本次课上实验是完成数据库的增删改查。
包括增加用户信息、删除用户信息、多条件查找用户信息、修改用户信息（主要是复选框单选框等的相关操作。）
下面下看一下各个界面的样子。
总页面：显示全部页面：增加页面（可以控制复选框的选入个数）删除、修改、总修改、查找
在修改的时候相应的内容会出现在原来的框内，对于复选框和单选框也是如此：
下面是具体的代码：
Themain.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <style> a:link {color:blue;} a:visited {color:blue;}/*选择未访问、已访问、悬浮和活动链接，并设置它们的样式：*/ a:hover {color:red;} a{ font-size:22px; font-family:"楷体";/*设置字体*/ font-weight:2px; } h1 { color:red; font-size:44px;} </style> <body > <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); request.setAttribute("message", ""); </script> <%} %> <h1 align="center" >请选择下面其中一项</h1> <a href="UserServlet?method=allall"><h2 align="center">显示全部信息</h2></a> <a href="zc.jsp"><h2 align="center">增加相关数据</h2></a> <a href="delete.jsp"><h2 align="center">删除相关内容</h2></a> <a href="updatesome.jsp"><h2 align="center">修改相关内容</h2></a> <a href="selectmore.jsp"><h2 align="center">查找相关内容总的</h2></a> <a href="Examine.jsp"><h2 align="center">查找相关内容</h2></a> </body> </html>
checkall.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body >
<div align="center">
<h1 style="color: red;" align="center"> 所有成员信息列表</h1>
<table width="900">
<tr>
<td> <h3 style="color: yellow;">名字</h3></td>
<td><h3 style="color: yellow;">性别</h3></td>
<td><h3 style="color: yellow;">民族</h3></td>
<td><h3 style="color: yellow;">政治面目</h3></td>
</tr>
<c:forEach items="${allthing}" var="item" >
<tr>
<td> <a href="UserServlet?method=examine33&name=${item.name}">${item.name}</a></td>
<td>${item.sex}</td>
<td>${item.minzu}</td>
<td>${item.zhengzhi}</td>
</tr>
</c:forEach>
</table>
<a href="Themain.jsp"><h2 align="center">点击此处返回主页面</h2></a>
</div>
</body>
</html>
delete.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body text="yellow" style="background: url(images/wen7.jpg); background-size:100%" > <h2 align="center">请输入想要删除信息的用户名</h2> <form action="UserServlet?method=deletecheck" onsubmit="return chackall()" method="post" > <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <table align="center"> <tr><td>名字：</td><td><input type="text" id="name4" name="name4" style=" border-color:Lime;border-radius:6px;" maxlength="12" value="" placeholder="请输入账户名" /></td> <tr><td></td><td><input type="submit" value="删除此用户所有信息" style="background-color:CornflowerBlue;width:150px;height:25px;border-radius:4px;" ></td> <a href="Themain.jsp"><h3 align="center">点击此处回到主页面!!!!!!</h4></a> <script type="text/javascript"> //重置按钮处添加onclick调用formReset %> function checkZhanghao() { var zhanghao = document.getElementById("zhanghu4"); var zhanghao1=zhanghao.value; var reg = /^[a-z][a-z0-9A-Z]{6}/; var ref= /^[A-Z][a-z0-9A-Z]{6}/ if(reg.test(zhanghao1)||ref.test(zhanghao1)){ //符合规则 return true; }else{ //不符合规则 alert(‘账户格式错误,应以英文字母开头并且7位及以上‘); zhanghao.value = ""; zhanghao.focus(); return false; } } function chackall() { var zhanghu3=document.getElementById("zhanghu4"); if(zhanghu3.value=="") { alert("用户名不能为空"); zhanghu3.focus(); return false; } return true; } </script> </table> </form> </body> </html>
delete1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body text="yellow" style="background: url(images/wen5.jpg); background-size:100%"> <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <h2 align="center">恭喜您删除消息成功!!!!!</h2> <a href="Themain.jsp"><h2 align="center">点击此处返回到主页面</h2></a> </body> </html>
deletecheck2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <style> a:link {color:blue;} a:visited {color:blue;}/*选择未访问、已访问、悬浮和活动链接，并设置它们的样式：*/ a:hover {color:red;} a{ font-size:18px; font-family:"楷体";/*设置字体*/ font-weight:2px; } h1 { color:red; font-size:44px;} </style> <body text="red" > <div align="center"> <h1 style="color: red;" align="center"> 所有成员信息列表</h1> <table width="900"> <tr> <td> <h3 style="color: yellow;">名字</h3></td> <td><h3 style="color: yellow;">性别</h3></td> <td><h3 style="color: yellow;">民族</h3></td> <td><h3 style="color: yellow;">时间</h3></td> <td><h3 style="color: yellow;">年龄</h3></td> <td><h3 style="color: yellow;">政治面目</h3></td> <td><h3 style="color: yellow;">服务类别</h3></td> </tr> <c:forEach items="${Thething1}" var="item" > <tr> <td>${item.name}</td> <td>${item.sex}</td> <td>${item.minzu}</td> <td>${item.time}</td> <td>${item.age}</td> <td>${item.zhengzhi}</td> <td><c:if test="${fn:contains(item.fuwu,‘A‘)}">扶危济困 </c:if> <c:if test="${fn:contains(item.fuwu,‘B‘)}">敬老助残 </c:if> <c:if test="${fn:contains(item.fuwu,‘C‘)}">社区服务 </c:if> <c:if test="${fn:contains(item.fuwu,‘D‘)}">秩序维护 </c:if> <c:if test="${fn:contains(item.fuwu,‘E‘)}">文体服务 </c:if> <c:if test="${fn:contains(item.fuwu,‘F‘)}">环境保护</c:if> <c:if test="${fn:contains(item.fuwu,‘G‘)}">治安防范 </c:if> <c:if test="${fn:contains(item.fuwu,‘H‘)}">医疗救治 </c:if> <c:if test="${fn:contains(item.fuwu,‘I‘)}">法律援助</c:if> <c:if test="${fn:contains(item.fuwu,‘J‘)}">大型活动 </c:if> <c:if test="${fn:contains(item.fuwu,‘K‘)}">心理疏导 </c:if> <c:if test="${fn:contains(item.fuwu,‘L‘)}">精神抚慰 </c:if> <c:if test="${fn:contains(item.fuwu,‘M‘)}">支教支医 </c:if> <c:if test="${fn:contains(item.fuwu,‘N‘)}">科学普及 </c:if> <c:if test="${fn:contains(item.fuwu,‘O‘)}">应急救援 </c:if> <c:if test="${fn:contains(item.fuwu,‘P‘)}">便民服务 </c:if> <c:if test="${fn:contains(item.fuwu,‘Q‘)}">民事调解 </c:if> <c:if test="${fn:contains(item.fuwu,‘X‘)}">文明引导 </c:if> <c:if test="${fn:contains(item.fuwu,‘Y‘)}">安全生产 </c:if> <c:if test="${fn:contains(item.fuwu,‘Z‘)}">禁毒宣传 </c:if> </td> <td><a href="UserServlet?method=delete&name=${item.name}" onclick="return check()">删除</a> </tr> </c:forEach> </table> <script type="text/javascript"> function check() { if (confirm("真的要删除吗？")){ return true; }else{ return false; } } </script> <a href="Themain.jsp"><h2 align="center">点击此处返回主页面</h2></a> </html>
Examine.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body > <h2 align="center">请输入想要查询的消息的用户名</h2> <form action="UserServlet?method=examine" onsubmit="return chackall()" method="post" > <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> 名字：<input type="text" id="name3" name="name3" style=" border-color:Lime;border-radius:6px;" maxlength="12" /><br><br> 性别：<input type="radio" id="sex3" name="sex3" value="男" checked="checked" />男 <input type="radio" name="sex3" value="女" />女 <br><br> 民族：<input type="text" id="minzu3" style=" border-color:Lime;border-radius:6px;" name="minzu3" /><br><br> 时间：<input type="text" id="time3" style=" border-color:Lime;border-radius:6px;" name="time3" maxlength="8" /><br><br> 政治:<select name="zhengzhi3" id="zhengzhi3"> <option value="群众">群众</option> <option value="共青团员">共青团员</option> <option value="中共党员">中共党员</option> </select> <br><br> 服务类型: <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="A" />扶危济困 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="B" />敬老助残 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="C" />社区服务 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="D" />秩序维护 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="E" />文体服务 <br><br> <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="F" />环境保护 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="G" />治安防范 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="H" />医疗救治 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="I" />法律援助 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="J" />大型活动 <br><br> <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="K" />心理疏导 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="L" />精神抚慰 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="M" />支教支医 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="N " />科学普及 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="O "/>应急救援<br><br> <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="P" />便民服务 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="Q " />民事调解 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="X" />文明引导 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="Y" />安全生产 <input type="checkbox" name="fuwu3" onClick="doCheck(this)" value="Z " />禁毒宣传 <input type="submit" value="添加"> <input type="reset" value="重置"> <a href="Themain.jsp"><h3 align="left">点击此处回到主页面!!!!!!</h4></a> <br/> <br/> <input type="submit" value="进行查找" style="background-color:CornflowerBlue;width:150px;height:25px;border-radius:4px;" > <a href="Themain.jsp"><h3 align="center">点击此处回到主页面!!!!!!</h4></a> </form> </body> </html>
examine1.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<div align="center">
<h1 style="color: red;" align="center"> 所有成员信息列表</h1>
<table width="900">
<tr>
<td> <h3 style="color: yellow;">名字</h3></td>
<td><h3 style="color: yellow;">性别</h3></td>
<td><h3 style="color: yellow;">民族</h3></td>
<td><h3 style="color: yellow;">政治面目</h3></td>
</tr>
<c:forEach items="${Thething}" var="item" >
<tr>
<td> <a href="UserServlet?method=examine33&name=${item.name}">${item.name}</a></td>
<td>${item.sex}</td>
<td>${item.minzu}</td>
<td>${item.zhengzhi}</td>
</tr>
</c:forEach>
</table>
<a href="Themain.jsp"><h2 align="center">点击此处返回主页面</h2></a>
</html>
examine2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body > <div align="center"> <h1 style="color: red;" align="center"> 所有成员信息列表</h1> <table width="900"> <tr> <td> <h3 style="color: yellow;">名字</h3></td> <td><h3 style="color: yellow;">性别</h3></td> <td><h3 style="color: yellow;">民族</h3></td> <td><h3 style="color: yellow;">时间</h3></td> <td><h3 style="color: yellow;">年龄</h3></td> <td><h3 style="color: yellow;">政治面目</h3></td> <td><h3 style="color: yellow;">服务类别</h3></td> </tr> <c:forEach items="${Thething2}" var="item" > <tr> <td>${item.name}</td> <td>${item.sex}</td> <td>${item.minzu}</td> <td>${item.time}</td> <td>${item.age}</td> <td>${item.zhengzhi}</td> <td><c:if test="${fn:contains(item.fuwu,‘A‘)}">扶危济困 </c:if> <c:if test="${fn:contains(item.fuwu,‘B‘)}">敬老助残 </c:if> <c:if test="${fn:contains(item.fuwu,‘C‘)}">社区服务 </c:if> <c:if test="${fn:contains(item.fuwu,‘D‘)}">秩序维护 </c:if> <c:if test="${fn:contains(item.fuwu,‘E‘)}">文体服务 </c:if> <c:if test="${fn:contains(item.fuwu,‘F‘)}">环境保护</c:if> <c:if test="${fn:contains(item.fuwu,‘G‘)}">治安防范 </c:if> <c:if test="${fn:contains(item.fuwu,‘H‘)}">医疗救治 </c:if> <c:if test="${fn:contains(item.fuwu,‘I‘)}">法律援助</c:if> <c:if test="${fn:contains(item.fuwu,‘J‘)}">大型活动 </c:if> <c:if test="${fn:contains(item.fuwu,‘K‘)}">心理疏导 </c:if> <c:if test="${fn:contains(item.fuwu,‘L‘)}">精神抚慰 </c:if> <c:if test="${fn:contains(item.fuwu,‘M‘)}">支教支医 </c:if> <c:if test="${fn:contains(item.fuwu,‘N‘)}">科学普及 </c:if> <c:if test="${fn:contains(item.fuwu,‘O‘)}">应急救援 </c:if> <c:if test="${fn:contains(item.fuwu,‘P‘)}">便民服务 </c:if> <c:if test="${fn:contains(item.fuwu,‘Q‘)}">民事调解 </c:if> <c:if test="${fn:contains(item.fuwu,‘X‘)}">文明引导 </c:if> <c:if test="${fn:contains(item.fuwu,‘Y‘)}">安全生产 </c:if> <c:if test="${fn:contains(item.fuwu,‘Z‘)}">禁毒宣传 </c:if> </td> </tr> </c:forEach> </table> <a href="Themain.jsp"><h2 align="center">点击此处返回主页面</h2></a> </html>
image.jsp
<%@ page contentType="image/JPEG"
import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*"
pageEncoding="GBK"%>
<%!Color getRandColor(int fc, int bc) {//给定范围获得随机颜色
Random random = new Random();
if (fc > 255)
fc = 255;
if (bc > 255)
bc = 255;
int r = fc + random.nextInt(bc - fc);
int g = fc + random.nextInt(bc - fc);
int b = fc + random.nextInt(bc - fc);
return new Color(r, g, b);
}%>
<%
//设置页面不缓存
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
// 在内存中创建图象
int width = 60, height = 20;
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
//画边框
//g.setColor(new Color());
//g.drawRect(0,0,width-1,height-1);
// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160, 200));
for (int i = 0; i < 100; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
// 取随机产生的认证码(4位数字)
String sRand = "";
for (int i = 0; i < 4; i++) {
String rand = String.valueOf(random.nextInt(10));
sRand += rand;
// 将认证码显示到图象中
g.setColor(new Color(20 + random.nextInt(110), 20 + random
.nextInt(110), 20 + random.nextInt(110)));//调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
g.drawString(rand, 13 * i + 6, 16);
}
// 将认证码存入SESSION
session.setAttribute("code", sRand);
// 图象生效
g.dispose();
// 输出图象到页面
ImageIO.write(image, "JPEG", response.getOutputStream());
out.clear();
out=pageContext.pushBody();
%>
login.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Insert title here</title> </head> <body text="yellow" style="background: url(images/wen7.jpg); background-size:100%"> <form action="UserServlet?method=search" method="post" onsubmit="return check()"> <table> <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <tr><td>账户：</td><td><input type="text" name="zhanghu" id="zhanghu" style=" border-color:Lime;border-radius:6px;" placeholder="请输入账户" /><br><br> </td></tr> <tr><td>密码：</td><td><input type="password" name="psw" id="psw" style=" border-color:Lime;border-radius:6px;" placeholder="请输入密码" /><br><br> </td></tr> <td>验证码：</td> <td><input type="text" style=" border-color:Lime;border-radius:6px;" size=18 name="code" placeholder="请输入验证码" id="code" maxlength="4" value="" /> </td> <td> <img name="img" src="image.jsp" width="50" id="img" onclick="javascript:document.getElementById(‘img‘).setAttribute(‘src‘, ‘image.jsp?‘ + Math.random())"> </tr> <tr></tr> </table> <input type="submit" value="登录"> <input type="reset" value="重置"> <a href="Themain.jsp"><h3 align="left">点击此处回到主页面!!!!!!</h4></a> </form> <script type="text/javascript"> function check() { var zhanghu1=document.getElementById("zhanghu"); var mima1=document.getElementById("psw"); var yanzhang1=document.getElementById("code"); if(zhanghu1.value=="") { alert("用户名不能为空请填写"); zhanghu1.focus(); return false; } if(mima1.value=="") { alert("密码不能为空请填写"); mima1.focus(); return false; } if(yanzheng1.value=="") { alert("验证码不能为空请填写"); yanzheng1.focus(); return false; } } </script> </body> </html>
NewFile.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Insert title here</title> </head> <body text="red" style="background: url(images/wen5.jpg); background-size:100%"> <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <h2 align="center">恭喜您登录成功！！！</h2> <a href="Themain.jsp"><h3 align="center">点击此处回到主页面!!!!!!</h4></a> </body> </html>
selectmore_show.jsp
<%@ page language="java" contentType="text/html; charse=tUTF-8" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>信息显示页面</title> </head> <body> <a href="Themain.jsp">返回主界面</a> <% Object message=request.getAttribute("message"); if(message!=null&&!"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%}%> <table> <tr> <td>姓名</td> <td>性别</td> <td>民族</td> <td>注册日期</td> <td>年龄</td> <td>政治面貌</td> <td>服务类别</td> </tr> <c:forEach items="${course11}" var="course1"> <tr> <td>${course1.name}</td> <td>${course1.sex}</td> <td>${course1.minzu}</td> <td>${course1.time}</td> <td>${course1.age}</td> <td>${course1.zhengzhi}</td> <td>${course1.fuwu}</td> </tr> </c:forEach> </table> </body> </html>
selectmore.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>查询页面</title> <script> var i=1; var j=1; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; function demoDisplay(){ if(document.getElementById("p2").style.display=="none"){ i++; j++; document.getElementById("p2").style.display="inline"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; // alert(i); // alert(j); return; }else if(document.getElementById("p3").style.display=="none") { i++; j++; document.getElementById("p3").style.display="inline"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; // alert(i); // alert(j); return; }else if(document.getElementById("p4").style.display=="none") { i++; j++; document.getElementById("p4").style.display="inline"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; // alert(i); // alert(j); return; }else if(document.getElementById("p5").style.display=="none") { i++; j++; document.getElementById("p5").style.display="inline"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; // alert(i); // alert(j); return; } } function demoVisibility(){ if(document.getElementById("p5").style.display=="inline") { i--; j--; document.getElementById("p5").style.display="none"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; //System.out.println("i:"+i+"j"+j); return; }else if(document.getElementById("p4").style.display=="inline") { i--; j--; document.getElementById("p4").style.display="none"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; //System.out.println("i:"+i+"j"+j); return; }else if(document.getElementById("p3").style.display=="inline") { i--; j--; document.getElementById("p3").style.display="none"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; //System.out.println("i:"+i+"j"+j); return; }else if(document.getElementById("p2").style.display=="inline") { i--; j--; document.getElementById("p2").style.display="none"; document.getElementById(‘number1‘).value=i; document.getElementById(‘number2‘).value=j; //System.out.println("i:"+i+"j"+j); return; } } </script> </head> <body> <% Object message=request.getAttribute("message"); if(message!=null&&!"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%}%> <form action="Servlet" method="post"> <br> <button type="button" onclick="demoDisplay()" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon">+</i></button> <button type="button" onclick="demoVisibility()" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon">-</i></button><br> <div id="p1"> <select name="g22" style="visibility:hidden"> <option value="且">且</option> <option value="或">或</option> </select> <select name="s1" > <option>名字</option> <option>性别</option> <option>民族</option> <option>注册日期</option> <option>年龄</option> </select> <input type="text" name="shuru1" value="" /> <select name="c1"> <option>精确</option> <option>模糊</option> </select> <br> </div> <div id="p2" style="display:none"> <select name="g1" > <option value="且">且</option> <option value="或">或</option> </select> <select name="s2"> <option>名字</option> <option>性别</option> <option>民族</option> <option>注册日期</option> <option>年龄</option> </select> <input type="text" name="shuru2" value="" /> <select name="c2"> <option>精确</option> <option>模糊</option> </select> <br> </div> <div id="p3" style="display:none"> <select name="g2"> <option value="且">且</option> <option value="或">或</option> </select> <select name="s3"> <option>名字</option> <option>性别</option> <option>民族</option> <option>注册日期</option> <option>年龄</option> </select> <input type="text" name="shuru3" value="" /> <select name="c3"> <option>精确</option> <option>模糊</option> </select> <br> </div> <div id="p4" style="display:none"> <select name="g3"> <option value="且">且</option> <option value="或">或</option> </select> <select name="s4"> <option>名字</option> <option>性别</option> <option>民族</option> <option>注册日期</option> <option>年龄</option> </select> <input type="text" name="shuru4" value="" /> <select name="c4"> <option>精确</option> <option>模糊</option> </select> <br> </div> <div id="p5" style="display:none"> <select name="g4"> <option value="且">且</option> <option value="或">或</option> </select> <select name="s5"> <option>名字</option> <option>性别</option> <option>民族</option> <option>注册日期</option> <option>年龄</option> </select> <input type="text" name="shuru5" value="" /> <select name="c5"> <option>精确</option> <option>模糊</option> </select> </div> <p hidden> <input type="text" value="1" id="number1" name="number1"> <input type="text" value="1" id="number2" name="number2"> </p> <br> <input type="submit" name="submit" value="查询" > </form> <br> <h4 align="left"> <%-- 一共查询到了<span style="color:red"><%=list.size() %></span>条数据 --%> </h4> <table class="table table-striped"> <a href="Themain.jsp"><h3 align="left">点击此处回到主页面!!!!!!</h4></a> </table> </body> </html>
updatesome.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body > <h2 align="center">请输入想要修改信息的用户名</h2> <form action="UserServlet?method=look" onsubmit="return chackall()" method="post" > <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <table align="center"> <tr><td>名字：</td><td><input type="text" id="name5" style=" border-color:Lime;border-radius:6px;" name="name5" maxlength="12" value="" placeholder="请输入账户名" /></td> <tr><td></td><td><input type="submit" value="进行修改" style="background-color:CornflowerBlue;width:150px;height:25px;border-radius:4px;" ></td> <a href="Themain.jsp"><h3 align="center">点击此处回到主页面!!!!!!</h4></a> <script type="text/javascript"> //重置按钮处添加onclick调用formReset %> function checkZhanghao() { var zhanghao = document.getElementById("zhanghu3"); var zhanghao1=zhanghao.value; var reg = /^[a-z][a-z0-9A-Z]{6}/; var ref= /^[A-Z][a-z0-9A-Z]{6}/ if(reg.test(zhanghao1)||ref.test(zhanghao1)){ //符合规则 return true; }else{ //不符合规则 alert(‘账户格式错误,应以英文字母开头并且7位及以上‘); zhanghao.value = ""; zhanghao.focus(); return false; } } function chackall() { var zhanghu3=document.getElementById("zhanghu3"); if(zhanghu3.value=="") { alert("用户名不能为空"); zhanghu3.focus(); return false; } return true; } </script> </table> </form> </body> </html>
updatesome1,jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Insert title here</title> </head> <body > <form action="UserServlet?method=update" method="post" onsubmit="return chackall()" > <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> 名字：<input type="text" id="name6" name="name6" style=" border-color:Lime;border-radius:6px;" value="${user3.name}" maxlength="12" /><br><br> 性别： <input type="radio" name="sex6" id="sex6" value="男" <c:if test="${user3.sex==\"男\" }">checked</c:if>>男 <input type="radio" name="sex6" id="sex6" value="女" <c:if test="${user3.sex==\"女\" }">checked</c:if>>女 <br><br> 民族：<input type="text" id="minzu6" style=" border-color:Lime;border-radius:6px;" value="${user3.minzu}" name="minzu6" /><br><br> 时间：<input type="text" id="time6" style=" border-color:Lime;border-radius:6px;" name="time6" value="${user3.time}" maxlength="8" /><br><br> 年龄：<input type="text" id="age6" name="age6" value="${user3.age}" style=" border-color:Lime; border-radius:6px;" /><br><br> 政治:<select name="zhengzhi6" id="zhengzhi6"> <option value="群众" <c:if test="${user3.zhengzhi==\"群众\" }">selected</c:if> >群众</option> <option value="共青团员" <c:if test="${user3.zhengzhi==\"共青团员\" }">selected</c:if> >共青团员</option> <option value="中共党员" <c:if test="${user3.zhengzhi==\"中共党员\" }">selected</c:if> >中共党员</option> </select> <br><br> 服务类型: <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="A" <c:if test="${fn:contains(user3.fuwu,‘A‘)}">checked</c:if> />扶危济困 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="B" <c:if test="${fn:contains(user3.fuwu,‘B‘)}">checked</c:if> />敬老助残 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="C" <c:if test="${fn:contains(user3.fuwu,‘C‘)}">checked</c:if> />社区服务 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="D" <c:if test="${fn:contains(user3.fuwu,‘D‘)}">checked</c:if>/>秩序维护 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="E" <c:if test="${fn:contains(user3.fuwu,‘E‘)}">checked</c:if>/>文体服务 <br><br> <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="F" <c:if test="${fn:contains(user3.fuwu,‘F‘)}">checked</c:if>/>环境保护 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="G" <c:if test="${fn:contains(user3.fuwu,‘G‘)}">checked</c:if>/>治安防范 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="H" <c:if test="${fn:contains(user3.fuwu,‘H‘)}">checked</c:if>/>医疗救治 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="I" <c:if test="${fn:contains(user3.fuwu,‘I‘)}">checked</c:if>/>法律援助 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="J" <c:if test="${fn:contains(user3.fuwu,‘J‘)}">checked</c:if>/>大型活动 <br><br> <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="K" <c:if test="${fn:contains(user3.fuwu,‘K‘)}">checked</c:if>/>心理疏导 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="L" <c:if test="${fn:contains(user3.fuwu,‘L‘)}">checked</c:if>/>精神抚慰 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="M" <c:if test="${fn:contains(user3.fuwu,‘M‘)}">checked</c:if>/>支教支医 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="N" <c:if test="${fn:contains(user3.fuwu,‘N‘)}">checked</c:if>/>科学普及 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="O" <c:if test="${fn:contains(user3.fuwu,‘O‘)}">checked</c:if>/>应急救援<br><br> <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="P" <c:if test="${fn:contains(user3.fuwu,‘P‘)}">checked</c:if> />便民服务 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="Q"<c:if test="${fn:contains(user3.fuwu,‘Q‘)}">"checked"</c:if> />民事调解 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="X"<c:if test="${fn:contains(user3.fuwu,‘X‘)}">checked</c:if> />文明引导 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="Y" <c:if test="${fn:contains(user3.fuwu,‘Y‘)}">checked</c:if>/>安全生产 <input type="checkbox" name="fuwu6" onClick="doCheck(this)" value="Z" <c:if test="${fn:contains(user3.fuwu,‘Z‘)}">checked</c:if>/>禁毒宣传 <input type="submit" value="确认修改"> <br/> <br/> <script type="text/javascript"> //重置按钮处添加onclick调用formReset %> var num=0; function doCheck(ctrl) { if(ctrl.checked){ num++; //window.alert("iNumChecked++" + iNumChecked); } else { num--; //window.alert("iNumChecked--" + iNumChecked); } if (num> 4) { ctrl.checked = false; num--; window.alert(‘最多可以选择六组进行比较‘); } } function checkZhanghao() { var zhanghao = document.getElementById("zhanghu"); var zhanghao1=zhanghao.value; var reg = /^[a-z][a-z0-9A-Z]{6}/; var ref= /^[A-Z][a-z0-9A-Z]{6}/ if(reg.test(zhanghao1)||ref.test(zhanghao1)){ //符合规则 return true; }else{ //不符合规则 alert(‘账户格式错误,应以英文字母开头并且7位及以上‘); zhanghao.value = ""; zhanghao.focus(); return false; } } function checkPassword() { var password = document.getElementById("psw"); if((password.value).length<8) { alert(‘密码应为8位英文或数字‘); password.value=""; password.focus(); return false; } } function checkId() { var id1 = document.getElementById("xuehao") var id=id1.value; //学号的正确形式 // var reg = /^[0-9a-zA-Z]{6}/; if((id<"20180000")|| (id>"20189999")) { alert(‘学号格式不正确应以2018开头的八位数字，请重新填写！‘); id1.value=""; id1.focus(); return false; } else{ //不符合规则 return true; } } </script> <script type="text/javascript"> function chackall() { var sex=document.getElementById("sex"); var xueyuan=document.getElementById("xueyuan"); var name=document.getElementById("name"); var xi=document.getElementById("xi"); var class1=document.getElementById("class1"); var year=document.getElementById("year"); var sheng=document.getElementById("sheng"); var beizhu=document.getElementById("beizhu"); var mail=document.getElementById("mail"); if(sex.value=="") { alert("性别不能为空"); sex.focus(); return false; } if(name.value=="") { alert("名字不能为空"); name.focus(); return false; } if(mail.value=="") { alert("邮箱不能为空"); n.focus(); return false; } if(xueyuan.value=="") { alert("所在学院不能为空"); xueyuan.focus(); return false; } if(xi.value=="") { alert("所在系不能为空"); xi.focus(); return false; } if(class1.value=="") { alert("所在班级不能为空"); class1.focus(); return false; } if(year.value=="") { alert("入学年份不能为空"); year.focus(); return false; } if(sheng.value=="") { alert("生源地不能为空"); sheng.focus(); return false; } if(beizhu.value=="") { alert("备注不能为空"); beizhu.focus(); return false; } } </script> </form> </body> </html>
updatesome2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body style="background: url(images/wen7.jpg); background-size:100%" text="yellow"> <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> <h2 align="center">恭喜您修改信息成功！！！！！</h2> <h2 align="center"><a href="Themain.jsp">点击此处回到主页面</a></h2> </body> </html>
zc.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Insert title here</title> </head> <body > <%--onsubmit="return chackall()" --%> <form action="UserServlet?method=add" method="post" onsubmit="return chackall()" > <% Object message = request.getAttribute("message");//放置一个字符串，并取出 if(message!=null && !"".equals(message)){ %> <script type="text/javascript"> alert("<%=request.getAttribute("message")%>"); </script> <%} %> 名字：<input type="text" id="name" name="name" style=" border-color:Lime;border-radius:6px;" maxlength="12" required="required" /><br><br> 性别：<input type="radio" id="sex" name="sex" value="男" checked="checked" required="required" />男 <input type="radio" name="sex" value="女" />女 <br><br> 民族：<input type="text" id="minzu" style=" border-color:Lime;border-radius:6px;" name="minzu" required="required" /><br><br> 时间：<input type="date" id="time" style=" border-color:Lime;border-radius:6px;" name="time" maxlength="8" required="required" /><br><br> 年龄：<input type="text" id="age" name="age" style=" border-color:Lime;border-radius:6px;" required="required" /><br><br> 政治:<select name="zhengzhi" id="zhengzhi" required="required"> <option value="群众">群众</option> <option value="共青团员">共青团员</option> <option value="中共党员">中共党员</option> </select> <br><br> 服务类型: <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="A" />扶危济困 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="B" />敬老助残 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="C" />社区服务 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="D" />秩序维护 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="E" />文体服务 <br><br> <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="F" />环境保护 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="G" />治安防范 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="H" />医疗救治 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="I" />法律援助 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="J" />大型活动 <br><br> <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="K" />心理疏导 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="L" />精神抚慰 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="M" />支教支医 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="N " />科学普及 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="O "/>应急救援<br><br> <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="P" />便民服务 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="Q " />民事调解 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="X" />文明引导 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="Y" />安全生产 <input type="checkbox" name="fuwu" onClick="doCheck(this)" value="Z" />禁毒宣传 <input type="submit" value="添加"> <input type="reset" value="重置"> <a href="Themain.jsp"><h3 align="left">点击此处回到主页面!!!!!!</h4></a> <br/> <br/> <%-- <script type="text/javascript"> //重置按钮处添加onclick调用formReset %> function checkZhanghao() { var zhanghao = document.getElementById("zhanghu"); var zhanghao1=zhanghao.value; var reg = /^[a-z][a-z0-9A-Z]{6}/; var ref= /^[A-Z][a-z0-9A-Z]{6}/ if(reg.test(zhanghao1)||ref.test(zhanghao1)){ //符合规则 return true; }else{ //不符合规则 alert(‘账户格式错误,应以英文字母开头并且7位及以上‘); zhanghao.value = ""; zhanghao.focus(); return false; } } function checkPassword() { var password = document.getElementById("psw"); if((password.value).length<8) { alert(‘密码应为8位英文或数字‘); password.value=""; password.focus(); return false; } } function checkId() { var id1 = document.getElementById("xuehao") var id=id1.value; //学号的正确形式 // var reg = /^[0-9a-zA-Z]{6}/; if((id<"20180000")|| (id>"20189999")) { alert(‘学号格式不正确应以2018开头的八位数字，请重新填写！‘); id1.value=""; id1.focus(); return false; } else{ //不符合规则 return true; } } </script>--%> <script type="text/javascript"> var num=0; function doCheck(ctrl) { if(ctrl.checked) { num++; } else { num--; } if (num> 4) { ctrl.checked = false; num--; window.alert(‘最多可以选择4组进行比较‘); } } <%-- var name=document.getElementById("name"); var sex=document.getElementById("sex"); var minzu=document.getElementById("minzu"); var time=document.getElementById("time"); var age=document.getElementById("age"); var zhengzhi=document.getElementById("zhengzhi"); var fuwu=document.getElementById("fuwu"); if(name.value=="") { alert("名字不能为空"); name.focus(); return false; } if(sex.value=="") { alert("性别不能为空"); sex.focus(); return false; } if(minzu.value=="") { alert("民族不能为空"); minzu.focus(); return false; } if(time.value=="") { alert("时间不能为空"); time.focus(); return false; } if(age.value=="") { alert("年龄不能为空"); age.focus(); return false; } if(zhengzhi.value=="") { alert("政治面目不能为空"); zhengzhi.focus(); return false; } if(fuwu.value=="") { alert("服务不能为空"); fuwu.focus(); return false; } --%> function chackall() { var a=document.getElementsByName(‘fuwu‘); var b=0; //设定一个初始值 for(var i=0;i<a.length;i++) { if(a[i].checked==true) { return true; } else { if(a[i].checked==false) { b++; //如果方框没选中，该值会累加 } if(b==a.length) //如果该值和方框的个数相同，那么就会报错 { alert(‘服务类型最少选一个，最多选四个,请重新操作‘); return false; } } } } </script> </form> </body> </html>
zc2.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body style="background: url(images/wen7.jpg); background-size:100%" text="yellow">
<h2 align="center">恭喜您添加用户成功</h2>
<a href="Themain.jsp"><h3 align="center">点击此处回到主页面!!!!!!</h4></a>
</body>
</html>
User.java
package com.newjavaweb; public class User { private String name; private String sex; private String minzu; private String time; private String age; private String zhengzhi; private String fuwu; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getMinzu() { return minzu; } public void setMinzu(String minzu) { this.minzu = minzu; } public String getTime() { return time; } public void setTime(String time) { this.time = time; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } public String getZhengzhi() { return zhengzhi; } public void setZhengzhi(String zhengzhi) { this.zhengzhi = zhengzhi; } public String getFuwu() { return fuwu; } public void setFuwu(String fuwu) { this.fuwu = fuwu; } public User(String name, String sex, String minzu, String time, String age, String zhengzhi, String fuwu) { super(); this.name = name; this.sex = sex; this.minzu = minzu; this.time = time; this.age = age; this.zhengzhi = zhengzhi; this.fuwu = fuwu; } }
userdao.jsp
package Dao; import java.io.IOException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import util.DBUtil; import com.newjavaweb.User; public class userdao { public boolean add(User user) { String sql = "insert into text(name,sex,minzu,time,age,zhengzhi,fuwu)" + "values(‘" + user.getName() + "‘,‘" + user.getSex()+ "‘,‘" + user.getMinzu() + "‘,‘" + user.getTime()+ "‘,‘" + user.getAge()+ "‘,‘" + user.getZhengzhi()+ "‘,‘" + user.getFuwu()+ "‘)"; Connection conn = DBUtil.getConn();//调用方法连接数据库 Statement state = null;//创建一个Statement对象来执行静态的SQL语句 //Statement用于在已经建立数据库连接上发送静态的SQL语句 boolean f = false; int a = 0 ; try { //监视大括号内的代码 state = conn.createStatement();//上面的是详解 a = state.executeUpdate(sql); //执行指定的更新类的SQl语句，并返回操作结果的整型值 } catch (Exception e) { //捕获错误 e.printStackTrace(); } finally { //关闭z 连接 DBUtil.close(state, conn); } if (a > 0) { f = true; } return f; } public static List<User> loadview(String sql) { // TODO Auto-generated method stub String sql1="select * from text "+ sql; List<User> list =new ArrayList<User>(); Connection con=null; PreparedStatement psts=null; ResultSet rs=null; try { con=DBUtil.getConn(); //String sql="select * from course"; psts=con.prepareStatement(sql1); rs=psts.executeQuery();//记录返回的结果 while(rs.next()) { String name=rs.getString("name"); String sex=rs.getString("sex"); String nation=rs.getString("minzu"); String time=rs.getString("time"); String age=rs.getString("age"); String kind=rs.getString("zhengzhi"); String serve=rs.getString("fuwu"); User yi=new User(name,sex,nation,time,age,kind,serve); list.add(yi); } DBUtil.close(rs, psts, con); } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } return list; } //return null; public String find(String name) { String sql = "select * from text where "; if (name!= "") { sql += "name like ‘" + name +"‘"; } Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; String username2="@"; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { username2 = rs.getString("name"); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return username2; } public String search(String name) { String sql = "select * from text where "; if (name!= "") { sql += "name like ‘%" + name + "%‘"; } Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; String name2 = "@"; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { name2 = rs.getString("name"); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return name2; } public String search1(String name,String sex,String minzu,String time,String zhengzhi,String fuwu) { String sql = "select * from text where "; if (name!= "") { sql += "name like ‘%" + name + "%‘"; } else if(sex!="") { sql += "sex like ‘%" + sex + "%‘"; } else if(minzu!="") { sql += "minzu like ‘%" + minzu + "%‘"; } else if(time!="") { sql += "time like ‘%" + time + "%‘"; } else if(zhengzhi!="") { sql += "zhengzhi like ‘%" + zhengzhi + "%‘"; } else if(fuwu!="") { sql += "fuwu like ‘%" + fuwu + "%‘"; } Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; String name2 = "@"; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { name2 = rs.getString("name"); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return name2; } public List<User> examine(String name1) throws ServletException, IOException { String sql = "select * from text where "; if (name1!= "") { sql += "name like ‘%" + name1 + "%‘"; } List<User> list1 = new ArrayList<>(); Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs1 = null; try { state = conn.createStatement(); rs1 = state.executeQuery(sql); while (rs1.next()) { String name=rs1.getString("name"); String sex=rs1.getString("sex"); String minzu=rs1.getString("minzu"); String time=rs1.getString("time"); String age=rs1.getString("age"); String zhengzhi=rs1.getString("zhengzhi"); String fuwu=rs1.getString("fuwu"); User bean2 = new User(name,sex,minzu,time,age,zhengzhi,fuwu); list1.add(bean2); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs1, state, conn); } return list1; } public List<User> theall() { String sql = "select * from text";//全部 List<User> list = new ArrayList<>(); Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); User bean = null; while (rs.next()) { String name = rs.getString("name"); String sex = rs.getString("sex"); String minzu = rs.getString("minzu"); String time = rs.getString("time"); String age= rs.getString("age"); String zhengzhi = rs.getString("zhengzhi"); String fuwu = rs.getString("fuwu"); bean = new User(name,sex,minzu,time,age,zhengzhi,fuwu); list.add(bean); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return list; } public boolean delete (String name) { boolean f = false; String sql = "delete from text where name=‘" + name + "‘"; Connection conn = DBUtil.getConn(); Statement state = null; int a = 0; try { state = conn.createStatement(); a = state.executeUpdate(sql); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(state, conn); } if (a > 0) { f = true; } return f; } public User getUserbyzhanghu(String name5) { String sql = "select * from text where name =‘" + name5 + "‘"; Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; User user3 = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { String name = rs.getString("name"); String sex = rs.getString("sex"); String minzu = rs.getString("minzu"); String time = rs.getString("time"); String age= rs.getString("age"); String zhengzhi = rs.getString("zhengzhi"); String fuwu = rs.getString("fuwu"); user3= new User(name,sex,minzu,time,age,zhengzhi,fuwu); } } catch (Exception e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return user3; } public boolean update(User user,String zh) { String sql="update text set name=‘" + user.getName() + "‘,sex=‘" + user.getSex() + "‘,minzu=‘" + user.getMinzu() + "‘,time=‘" + user.getTime() + "‘,age=‘" + user.getAge() + "‘,zhengzhi=‘" + user.getZhengzhi() + "‘,fuwu=‘" + user.getFuwu() + "‘ where name=‘" + zh + "‘"; Connection conn = DBUtil.getConn(); Statement state = null; boolean f = false; int a = 0; try { state = conn.createStatement(); a = state.executeUpdate(sql); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(state, conn); } if (a > 0) { f = true; } return f; } }
Servlet.java
package servlet; import java.io.IOException; import java.util.ArrayList; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import Dao.userdao; import com.newjavaweb.User; /** * Servlet implementation class Servlet */ @WebServlet("/Servlet") public class Servlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public Servlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.setCharacterEncoding("utf-8"); response.setContentType("textml;charset=utf-8"); userdao dao=new userdao(); java.util.List<User> list= new ArrayList<User>(); String p[] = new String[5];//获得条件 String s[] = new String[5];//获得内容 String g[] = new String[5];//获得关系 String f[] = new String[5];//获得精确或者模糊 String number = null; //String number1 = null; number=request.getParameter("number1"); //number1=request.getParameter("number2"); int n = Integer.parseInt(number);//接收条件的个数 //int n1 = Integer.parseInt(number1);// ?? ? ? for(int i=1;i<=n;i++) { p[i]= (String) request.getParameter("s"+i); s[i]=(String)request.getParameter("shuru"+i); f[i]=(String)request.getParameter("c"+i); System.out.println("精确还是模糊 "+f[i]); System.out.println("条件 "+p[i]); System.out.println("输入 "+s[i]); if(p[i].equals("名字")) { p[i] = "name"; } else if(p[i].equals("性别")) { p[i] = "sex"; }else if(p[i].equals("民族")) { p[i] = "minzu"; }else if(p[i].equals("注册日期")) { p[i] = "time"; }else if(p[i].equals("年龄")) { p[i] = "age"; } } for(int i=1;i<n;i++) { g[i]=(String) request.getParameter("g"+i); if(g[i].equals("且")) { g[i]="and"; }else if(g[i].equals("或")) { g[i]="or"; } System.out.println("且或"+g[i]); } String sql="where "; for(int i=1;i<n;i++) { if(s[i].equals("")) { continue; } if(f[i].equals("精确")) { sql=sql+p[i]+"=‘"+s[i]+"‘"+" "+g[i]+" "; }else if(f[i].equals("模糊")) { sql=sql+p[i]+" "+"LIKE"+" "+"‘%"+s[i]+"%‘"+" "+g[i]+" "; } } if(f[n].equals("精确")) { sql = sql + p[n]+"="+"‘"+s[n]+"‘"; } else { sql = sql + p[n]+" "+"LIKE"+" "+"‘%"+s[n]+"%‘"; } // } if(n==1&&s[1].equals("")) { System.out.println("什么也没传！"); sql=""; } list = dao.loadview(sql); if(list.size()!=0) { request.setAttribute("course11",list); request.setAttribute("message", "查询成功"); request.getRequestDispatcher("selectmore_show.jsp").forward(request,response); } else { request.setAttribute("message", "查询失败"); request.getRequestDispatcher("selectmore.jsp").forward(request,response); } // HttpSession session = request.getSession(); // session.setAttribute("tiaojian", list); //// int servletid=1; //// request.setAttribute("list", list); //// request.setAttribute("servletid", servletid); // try { //// request.getRequestDispatcher("/admin/123.jsp").forward(request, response); // response.sendRedirect(request.getContextPath()+"ow.jsp"); // } catch (IOException e) { // // TODO ? ? catch // e.printStackTrace(); // } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
UserServlet.java
package servlet; import java.io.IOException; import java.sql.ResultSet; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.swing.JOptionPane; import com.mysql.jdbc.Connection; import com.mysql.jdbc.Statement; import com.newjavaweb.User; import Dao.userdao; import util.DBUtil; import java.util.List; /** * Servlet implementation class UserServlet */ @WebServlet("/UserServlet") public class UserServlet extends HttpServlet { static String wen; private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public UserServlet() { super(); // TODO Auto-generated constructor stub } userdao dao = new userdao(); protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.setCharacterEncoding("utf-8"); String method = req.getParameter("method"); if ("add".equals(method)) { add(req, resp); } else if("search".equals(method)) { search(req, resp); } else if("examine".equals(method)) { examine(req,resp); } else if("delete".equals(method)) { delete(req,resp); } else if("allall".equals(method)) { allall(req,resp); } else if("look".equals(method)) { look(req,resp); } else if("update".equals(method)) { update(req,resp); } else if("deletecheck".equals(method)) { deletecheck(req,resp); } else if("examine33".equals(method)) { examine33(req,resp); } } private void search(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { // TODO Auto-generated method stub req.setCharacterEncoding("utf-8"); String zhanghu = req.getParameter("zhanghu"); String psw = req.getParameter("psw"); String rpassword = dao.search(zhanghu); String yanzheng1=req.getParameter("code"); String yanzheng=(String)req.getSession().getAttribute("code"); if(!yanzheng1.equals(yanzheng)) { req.setAttribute("message", "验证码错误"); req.getRequestDispatcher("login.jsp").forward(req,resp); } if(psw.equals(rpassword)) { //JOptionPane.showMessageDialog(null,"登陆成功！"); req.setAttribute("message", "登陆成功！"); req.getRequestDispatcher("NewFile.jsp").forward(req,resp); } else { //JOptionPane.showMessageDialog(null,"账号不存在或密码错误！"); req.setAttribute("message", "账号不存在或密码错误！"); req.getRequestDispatcher("login.jsp").forward(req,resp); } } private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { // TODO Auto-generated method stub String name = req.getParameter("name"); String sex=req.getParameter("sex"); String minzu=req.getParameter("minzu"); String time=req.getParameter("time"); String age=req.getParameter("age"); String zhengzhi=req.getParameter("zhengzhi"); String [] fuwus = req.getParameterValues("fuwu");//复选框 StringBuffer buf = new StringBuffer(); for(String fuwu1 : fuwus){ buf.append(fuwu1); } String fuwu = buf.toString(); User user= new User(name,sex,minzu,time,age,zhengzhi,fuwu); String rusername = dao.find(name); if(!name.equals(rusername)) { dao.add(user); req.setAttribute("message", "添加成功!"); req.getRequestDispatcher("UserServlet?method=allall").forward(req, resp); }else { req.setAttribute("message", "账户重复，请重新输入!"); req.getRequestDispatcher("zc.jsp").forward(req, resp); } } private void deletecheck(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setCharacterEncoding("utf-8"); String name =req.getParameter("name4"); String rusername = dao.find(name); if(!name.equals(rusername)) { req.setAttribute("message", "用户不存在请重新输入"); req.getRequestDispatcher("delete.jsp").forward(req, resp); return; } List<User> Thething1 =dao.examine(name); req.setAttribute("Thething1", Thething1); req.getRequestDispatcher("deletecheck2.jsp").forward(req, resp); } private void delete(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{ req.setCharacterEncoding("utf-8"); String name =req.getParameter("name"); boolean wen=dao.delete(name); if(wen) { req.setAttribute("message", "删除成功！"); req.getRequestDispatcher("delete1.jsp").forward(req,resp); } else { req.setAttribute("message", "此用户不存在，删除失败"); req.getRequestDispatcher("delete.jsp").forward(req,resp); } } private void examine(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setCharacterEncoding("utf-8"); String name =req.getParameter("name3"); String sex =req.getParameter("sex3"); String minzu =req.getParameter("minzu3"); String time =req.getParameter("time3"); String zhengzhi =req.getParameter("zhengzhi3"); String fuwu =req.getParameter("fuwu3"); String rusername=dao.search1(name,sex,minzu,time,zhengzhi,fuwu); if(!name.equals(rusername)) { req.setAttribute("message", "用户不存在请重新输入"); req.getRequestDispatcher("Examine.jsp").forward(req, resp); return; } List<User> Thething =dao.examine(name); req.setAttribute("Thething", Thething); req.getRequestDispatcher("examine1.jsp").forward(req, resp); } private void examine33(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setCharacterEncoding("utf-8"); String name =req.getParameter("name"); List<User> Thething2 =dao.examine(name); req.setAttribute("Thething2", Thething2); req.getRequestDispatcher("examine2.jsp").forward(req, resp); } private void allall(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setCharacterEncoding("utf-8"); List<User> allthing = dao.theall(); req.setAttribute("allthing", allthing); req.getRequestDispatcher("checkall.jsp").forward(req,resp); } private void look(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setCharacterEncoding("utf-8"); String name5 = req.getParameter("name5"); wen=name5; String q1=dao.find(name5); if(q1.equals("@")) { req.setAttribute("message", "此用户不存在，不能进行修改"); req.getRequestDispatcher("updatesome.jsp").forward(req,resp); return; } User user3 = dao.getUserbyzhanghu(name5); req.setAttribute("user3", user3); req.getRequestDispatcher("updatesome1.jsp").forward(req,resp); } private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException { req.setCharacterEncoding("utf-8"); String name = req.getParameter("name6"); String sex=req.getParameter("sex6"); String minzu=req.getParameter("minzu6"); String time=req.getParameter("time6"); String age=req.getParameter("age6"); String zhengzhi=req.getParameter("zhengzhi6"); String [] fuwus = req.getParameterValues("fuwu6");//复选框 StringBuffer buf = new StringBuffer(); for(String fuwu1 : fuwus){ buf.append(fuwu1); } String fuwu = buf.toString(); User user= new User(name,sex,minzu,time,age,zhengzhi,fuwu); dao.update(user,name); req.setAttribute("message", "修改成功"); req.getRequestDispatcher("updatesome2.jsp").forward(req,resp); } }
DBUtile.java
package util; //数据库连接 import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; /** * 数据库连接工具 * @author Zheng * */ public class DBUtil { public static String db_url = "jdbc:mysql://localhost:3306/studentwen?useSSL=false"; public static String db_user = "root"; public static String db_pass = "511924"; public static Connection getConn () { Connection conn = null; try { Class.forName("com.mysql.jdbc.Driver");//加载驱动 conn = DriverManager.getConnection(db_url, db_user, db_pass);//通过输入的用户名还有密码来建立一个到数据库的连接主要是调用connect（）方法 } catch (Exception e) { e.printStackTrace(); } return conn; } /** * 关闭连接 * @param state * @param conn */ public static void close (Statement state, Connection conn) { if (state != null) { try { state.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } } public static void close (ResultSet rs, Statement state, Connection conn) { if (rs != null) { try { rs.close(); } catch (SQLException e) { e.printStackTrace(); } } if (state != null) { try { state.close(); } catch (SQLException e) { e.printStackTrace(); } } if (conn != null) { try { conn.close(); } catch (SQLException e) { e.printStackTrace(); } } } }
以上是这次数据库的增删改查的全部代码。基本上是比较全的了。包括的方面也比较多。
原文：https://www.cnblogs.com/dazhi151/p/11972813.html