JSP中useBean动作

  第1个例子

 

useBean1.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"%>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<form action="useBean2.jsp" method="post">
<jsp:useBean id="stu1" scope="session" class="com.Student"/>
 <jsp:setProperty name="stu1" property="age" value="10000"/>
 <jsp:getProperty name="stu1" property="age"/>
 <%-- jsp:getProperty 表示获取属性值并显示出来--%>
<input type="submit" value="提交">
</form>
</body>
</html>

 

useBean2.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"%>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
传递过来的值为:
<%--jsp:getProperty 表示获取属性值并显示出来--%>
<jsp:useBean id="stu1" scope="session" class="com.Student"/>
 <jsp:getProperty name="stu1" property="age"/>
</body>
</html>

 

com.Student

package com;

public class Student {
 private int sid;
 private String name;
 private int age;
 public int getSid() {
  return sid;
 }
 public void setSid(int sid) {
  this.sid = sid;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 } 
}

 

 

第2个例子

 

useBean3.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"%>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
 <form action="useBean4.jsp" method="post">
 <center>添加信息<br>
 学生学号<input type="text" name="sid"><br>
 学生姓名<input type="text" name="name"><br>
 学生年龄<input type="text" name="age"><br>
 <input type="submit" value="确定">
 </center>
 </form>
</body>
</html>

 

useBean4.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"%>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="stu2" scope="page" class="com.Student"></jsp:useBean>
<%--还有就是如果想一次设定所有参数,可以这样写 --%>
<jsp:setProperty name="stu2" property="*"/>

添加的学号是:<jsp:getProperty name="stu2" property="sid"/><br>
添加的姓名是:<jsp:getProperty name="stu2" property="name"/><br>
添加的年龄是:<jsp:getProperty name="stu2" property="age"/><br>
</body>
</html>

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