实体：
public class Product {
private String proName;
private String proType;
private float price;
private int number;
/**
* @return the proName
*/
public String getProName() {
return proName;
}
/**
* @param proName the proName to set
*/
public void setProName(String proName) {
this.proName = proName;
}
/**
* @return the proType
*/
public String getProType() {
return proType;
}
/**
* @param proType the proType to set
*/
public void setProType(String proType) {
this.proType = proType;
}
/**
* @return the price
*/
public float getPrice() {
return price;
}
/**
* @param price the price to set
*/
public void setPrice(float price) {
this.price = price;
}
/**
* @return the number
*/
public int getNumber() {
return number;
}
/**
* @param number the number to set
*/
public void setNumber(int number) {
this.number = number;
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Product [proName=" + proName + ", proType=" + proType
+ ", price=" + price + ", number=" + number + "]";
}
}
public class ProManager {
public void printProductMsg(Product pro) {
System.out.println(pro);
}
}
public class Test {
private String userName;
/**
* @return the userName
*/
public String getUserName() {
return userName;
}
/**
* @param userName the userName to set
*/
public void setUserName(String userName) {
this.userName = userName;
}
public void print() {
System.out.println("调用了方法");
}
}页面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
// 设置编码格式
request.setCharacterEncoding("UTF-8");
%>
<!-- 使用创建对象的动作 -->
<jsp:useBean id="pro" class="com.test.Product" scope="request" />
<!-- 通过setProperty动作设置值 -->
<%-- <jsp:setProperty property="proName" name="pro" value="电脑"/> --%>
<%-- <jsp:setProperty property="proName" name="pro" param="proName"/>
<jsp:setProperty property="proType" name="pro" param="proType"/>
<jsp:setProperty property="price" name="pro" param="price"/>
<jsp:setProperty property="number" name="pro" param="number"/> --%>
<!-- 通配符匹配属性【前提是表单元素的名称必须和属性名一致】-->
<jsp:setProperty property="*" name="pro"/>
<!-- 创建ProManager对象的实例 -->
<jsp:useBean id="proManager" class="com.test.ProManager" />
<%
proManager.printProductMsg(pro);
//request.getRequestDispatcher("show.jsp").forward(request, response);
%>
<!-- 跳转动作 [内部跳转动作]-->
<jsp:forward page="show.jsp" />
<!-- 保护动作 -->
<%-- <jsp:include page="" /> --%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<fieldset>
<legend>商品注册</legend>
<form action="doRegister.jsp" method="post">
<table>
<tr>
<th>商品名称:</th>
<td><input type="text" name="proName1" /></td>
</tr>
<tr>
<th>商品类型:</th>
<td>
<select name="proType">
<option value="-1">==请选择==</option>
<option value="生活品">生活用品</option>
<option value="日活品">日用品</option>
<option value="bu生活品">不日用品</option>
</select>
</td>
</tr>
<tr>
<th>价格:</th>
<td><input type="text" name="price" /></td>
</tr>
<tr>
<th>数量:</th>
<td><input type="text" name="number" /></td>
</tr>
<tr>
<td>
<input type="submit" value="注册" />
</td>
</tr>
</table>
</form>
</fieldset>
</body>
</html>
<%@page import="com.test.Product"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<!--
如果在同一个范围中存储相同key值对象，直接使用该对象，否则重新创建新对象
-->
<jsp:useBean id="pro" class="com.test.Product" scope="request" />
<body>
<h1>商品信息如下:</h1>
名称:<jsp:getProperty property="proName" name="pro"/><br/>
类型:<jsp:getProperty property="proType" name="pro"/><br/>
价格:<jsp:getProperty property="price" name="pro"/><br/>
数量:<jsp:getProperty property="number" name="pro"/><br/>
<%
request.setAttribute("name", "张撒");
request.setAttribute("name", "fdsfs");
%>
<%=request.getAttribute("name") %>
<jsp:include page="Test.jsp" />
<!--
<%--
<%@include file="" />
<jsp:include page="" />
1.使用指令会把包含页面内容放入当前页面在转译为java文件，而动作包含会把页面引用到当前页面
2.指令只会生成一个java源文件,而动作会生成引用jsp页面转译源文件
--%>
-->
</body>
</html>
<%@page import="com.test.Test"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!-- Test test = new Test(); 可以使用jsp动作代替 -->
<jsp:useBean id="test" class="com.test.Test" scope="page" /><!-- 创建对象动作 -->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
// 小脚本调用java类中的方法
//Test test = new Test();
test.print();
%>
<!-- 使用setproperty动作为对象的属性设置值 -->
<jsp:setProperty property="userName" name="test" value="张三"/>
<!-- 使用getProperty动作获取对象属性的值 -->
<jsp:getProperty property="userName" name="test"/>
</body>
</html>原文：http://lhmjava.blog.51cto.com/9668287/1623281