2019独角兽企业重金招聘Python工程师标准>>> 
使用存取器读取JavaBean中的数据
package com.javaweb.ch08;
import java.util.*;
//一个简单的JavaBean示例
public class Person{
//name属性
private String name;
//age属性
private int age;
//sex属性
private String sex;
//friends属性
private ArrayList friends;
//无参构造方法
public Person(){
}
//自定义构造的方法
public Person(String name,int age,String sex){
this.name = name;
this.age = age;
this.sex = sex;
}
//获取name的属性值
public String getName(){
return name;
}
//获取age属性值
public int getAge(){
return age;
}
//获取sex的属性值
public String getSex(){
return sex;
}
//设置name的属性
public void setName(String name){
this.name = name;
}
//设置age的属性值
public void setAge(int age){
this.age = age;
}
//设置sex的属性值
public void setSex(String sex){
this.sex = sex;
}
//设置friends的值
public void setFriends(ArrayList friends){
this.friends = friends;
}
//获取friends的属性值
public ArrayList getFriends(){
return friends;
}
}
<%@page language="java" contentType="text/html;charset=gb2312"%>
<%@page import="java.util.*,com.javaweb.ch08.*" %>
<!DOCTYPE html>
<html>
<head>
<title>设置JavaBean中的属性</title>
</head>
<body>
<%
//实例化一个Person
Person person = new Person("zhangdapeng",24,"男");
//创建一个friends实例
ArrayList friends = new ArrayList();
//添加值
friends.add("wang wu");
friends.add("li si");
person.setFriends(friends);
//存储在session范围内
session.setAttribute("person",person);
%>
<a href="GetJavaBean.jsp">跳转到GetJavaBean.jsp</a>
</body>
</html>
<%@page language="java" contentType="text/html;charset=gb2312"%>
<!DOCTYPE html>
<html>
<head>
<title>取得JavaBean中的属性值</title>
</head>
<body>
姓名：${sessionScope.person.name}<br />
年龄：${sessionScope.person.age}<br />
性别：${sessionScope.person.sex}<br />
朋友：${sessionScope.person.friends[0]},${sessionScope.person.friends[1]}<br />
</body>
</html>使用存储器读取Map中的数据
<%@page language="java" contentType="text/html;charset=gb2312"%>
<%@page import="java.util.*,com.javaweb.ch08.*" %>
<!DOCTYPE html>
<html>
<head>
<title>设置Map页面</title>
</head>
<body>
<%
//新建一个HashMap
HashMap userInfo = new HashMap();
//在HashMap中设置值
userInfo.put("username","zhangdapeng");
userInfo.put("password","zhnagda123");
//将值存储到session范围中
session.setAttribute("userInfo",userInfo);
%>
<a href="GetMapDemo.jsp">跳转到GetMapDemo.jsp</a>
</body>
</html>
<%@page language="java" contentType="text/html;charset=gb2312"%>
<!DOCTYPE html>
<html>
<head>
<title>使用存储器读取map中的数据</title>
</head>
<body>
用户名：${sessionScope.userInfo.username}<br />
密码：${sessionScope.userInfo.password}<br />
</body>
</html>使用存储器读取数组中的数据
<%@page language="java" contentType="text/html;charset=gb2312"%>
<%@page import="java.util.*,com.javaweb.ch08.*" %>
<!DOCTYPE html>
<html>
<head>
<title>设置Array页面</title>
</head>
<body>
<%
String[] names = {"zhangda1","zhangda2","zhangda3"};
//将值存储到session范围中
session.setAttribute("names",names);
%>
<a href="GetMapDemo.jsp">跳转到GetArrayDemo.jsp</a>
</body>
</html>
<%@page language="java" contentType="text/html;charset=gb2312"%>
<!DOCTYPE html>
<html>
<head>
<title>使用存储器读取map中的数据</title>
</head>
<body>
用户名1：${sessionScope.names[0]}<br />
用户名2：${sessionScope.names[1]}<br />
</body>
</html>存储器的复杂应用
<%@page language="java" contentType="text/html;charset=gb2312"%>
<%@page import="java.util.*,com.javaweb.ch08.*" %>
<!DOCTYPE html>
<html>
<head>
<title>设置Array页面</title>
</head>
<body>
<%
ArrayList<Person> persons = new ArrayList<Person>();
Person person1 = new Person("wang wu",24,"男");
Person person2 = new Person("wang liu",24,"女");
persons.add(person1);
persons.add(person2);
session.setAttribute("persons",persons);
%>
<a href="GetMapDemo.jsp">跳转到GetArrayDemo.jsp</a>
</body>
</html>
<%@page language="java" contentType="text/html;charset=gb2312"%>
<!DOCTYPE html>
<html>
<head>
<title>使用存储器读取map中的数据</title>
</head>
<body>
用户名1：${sessionScope.persons[0].name},${sessionScope.persons[0].age},${sessionScope.persons[0].sex}<br />
用户名2：${sessionScope.persons[1].name},${sessionScope.persons[1].age},${sessionScope.persons[1].sex}<br />
</body>
</html>