昨天说的那个hibernate太简单了，所以就没发出来，今天教spring+springmvc
//LoginAction.java
package org.mo.spring;
import java.util.HashMap;
import java.util.Map;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
public class LoginAction extends SimpleFormController {
private String fail_view;
private String success_view;
private int login(LoginInfo info) {
if (!"".equals(info.getAccount()) && !"".equals(info.getPassword())) {
if (UserInfo.exitsUser(info.getAccount())) {
if (UserInfo.confirmPassword(info.getAccount(), info.getPassword())) {
return 1;//登录成功
} else {
return 2;//用户密码不正确
}
} else {
return 3;//用户不存在
}
} else {
return 0;//填写信息有误
}
}
@Override
protected ModelAndView onSubmit(Object command, BindException errors)
throws Exception {
LoginInfo loginInfo = (LoginInfo) command;
String message = null;
Map<String, String> map = new HashMap<String, String>();
if (login(loginInfo) == 0) {
message = "用户名或密码为空";
map.put("msg", message);
return new ModelAndView(this.fail_view, map);
} else if (login(loginInfo) == 3) {
message = "用户不存在";
map.put("msg", message);
return new ModelAndView(this.fail_view, map);
} else if (login(loginInfo) == 2) {
message = "用户密码不正确";
map.put("msg", message);
return new ModelAndView(this.fail_view, map);
} else {
message = "登录成功";
map.put("msg", message);
return new ModelAndView(this.success_view, map);
}
}
public String getFail_view() {
return fail_view;
}
public void setFail_view(String fail_view) {
this.fail_view = fail_view;
}
public String getSuccess_view() {
return success_view;
}
public void setSuccess_view(String success_view) {
this.success_view = success_view;
}
}
//LoginInfo.java
package org.mo.spring;
public class LoginInfo implements java.io.Serializable {
private String account;
private String password;
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
//UserInfo.java
package org.mo.spring;
import java.util.HashMap;
import java.util.Map;
public class UserInfo {
private static Map<String, String> userInfo = new HashMap<String, String>();
static {
String user_one = "admin";
String password_one = "123456";
String user_two = "neusoft";
String password_two = "neusoft";
userInfo.put(user_one, password_one);
userInfo.put(user_two, password_two);
}
public static boolean exitsUser(String username) {
return userInfo.containsKey(username);
}
public static boolean confirmPassword(String username, String password) {
return userInfo.get(username).endsWith(password);
}
}
//applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd"> <bean id="loginAction" class="org.mo.spring.LoginAction"> <property name="commandClass"> <value>org.mo.spring.UserInfo</value> </property> <property name="fail_view"> <value>/error.jsp</value> </property> <property name="success_view"> <value>/main.jsp</value> </property> </bean> <bean id="f" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="/login.do">loginAction</prop> </props> </property> </bean> </beans>
//login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP ‘login.jsp‘ starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form action="login.do" method="post"> 用户名：<input type="text" name="account"><br/> 密 码：<input type="password" name="password"><br/> <input type="submit" value="提交"> </form> </body> </html>
//error.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘error.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
很遗憾，登录失败，失败原因是<%=request.getAttribute("msg") %>
</body>
</html>
原文：http://my.oschina.net/moziqi/blog/359852