jsp---EL存取器
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灯火互联
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 | 使用存取器读取javaBean中的数据 01 package com.javaweb.ch08; 02 import java.util.*; 03 //一个简单的javaBean示例 04 public class Person{ 05 //name属性 06 private String name; 07 //age属性 08 private int age; 09 //sex属性 10 private String sex; 11 //friends属性 12 private ArrayList friends; 13 //无参构造方法 14 public Person(){ 15 } 16 //自定义构造的方法 17 public Person(String name,int age,String sex){ 18 this.name = name; 19 this.age = age; 20 this.sex = sex; 21 } 22 //获取name的属性值 23 public String getName(){ 24 return name; 25 } 26 //获取age属性值 27 public int getAge(){ 28 return age; 29 } 30 //获取sex的属性值 31 public String getSex(){ 32 return sex; 33 } 34 //设置name的属性 35 public void setName(String name){ 36 this.name = name; 37 } 38 //设置age的属性值 39 public void setAge(int age){ 40 this.age = age; 41 } 42 //设置sex的属性值 43 public void setSex(String sex){ 44 this.sex = sex; 45 } 46 //设置friends的值 47 public void setFriends(ArrayList friends){ 48 this.friends = friends; 49 } 50 //获取friends的属性值 51 public ArrayList getFriends(){ 52 return friends; 53 } 54 } 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <%@page import="java.util.*,com.javaweb.ch08.*" %> 03 <!DOCTYPE html> 04 <html> 05 <head> 06 <title>设置javaBean中的属性</title> 07 </head> 08 <body> 09 <% 10 //实例化一个Person 11 Person person = new Person("zhangdapeng",24,"男"); 12 //创建一个friends实例 13 ArrayList friends = new ArrayList(); 14 //添加值 15 friends.add("wang wu"); 16 friends.add("li si"); 17 person.setFriends(friends); 18 //存储在session范围内 19 session.setAttribute("person",person); 20 21 %> 22 <a href="GetjavaBean.jsp">跳转到GetjavaBean.jsp</a> 23 </body> 24 </html> 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <!DOCTYPE html> 03 <html> 04 <head> 05 <title>取得javaBean中的属性值</title> 06 </head> 07 <body> 08 姓名：${sessionScope.person.name}<br /> 09 年龄：${sessionScope.person.age}<br /> 10 性别：${sessionScope.person.sex}<br /> 11 朋友：${sessionScope.person.friends[0]},${sessionScope.person.friends[1]}<br /> 12 </body> 13 </html> 使用存储器读取Map中的数据 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <%@page import="java.util.*,com.javaweb.ch08.*" %> 03 <!DOCTYPE html> 04 <html> 05 <head> 06 <title>设置Map页面</title> 07 </head> 08 <body> 09 <% 10 //新建一个HashMap 11 HashMap userInfo = new HashMap(); 12 //在HashMap中设置值 13 userInfo.put("username","zhangdapeng"); 14 userInfo.put("password","zhnagda123"); 15 //将值存储到session范围中 16 session.setAttribute("userInfo",userInfo); 17 18 %> 19 <a href="GetMapDemo.jsp">跳转到GetMapDemo.jsp</a> 20 </body> 21 </html> 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <!DOCTYPE html> 03 <html> 04 <head> 05 <title>使用存储器读取map中的数据</title> 06 </head> 07 <body> 08 用户名：${sessionScope.userInfo.username}<br /> 09 密码：${sessionScope.userInfo.password}<br /> 10 </body> 11 </html> 使用存储器读取数组中的数据 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <%@page import="java.util.*,com.javaweb.ch08.*" %> 03 <!DOCTYPE html> 04 <html> 05 <head> 06 <title>设置Array页面</title> 07 </head> 08 <body> 09 <% 10 String[] names = {"zhangda1","zhangda2","zhangda3"}; 11 //将值存储到session范围中 12 session.setAttribute("names",names); 13 14 %> 15 <a href="GetMapDemo.jsp">跳转到GetArrayDemo.jsp</a> 16 </body> 17 </html> 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <!DOCTYPE html> 03 <html> 04 <head> 05 <title>使用存储器读取map中的数据</title> 06 </head> 07 <body> 08 用户名1：${sessionScope.names[0]}<br /> 09 用户名2：${sessionScope.names[1]}<br /> 10 </body> 11 </html> 存储器的复杂应用 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <%@page import="java.util.*,com.javaweb.ch08.*" %> 03 <!DOCTYPE html> 04 <html> 05 <head> 06 <title>设置Array页面</title> 07 </head> 08 <body> 09 <% 10 ArrayList<Person> persons = new ArrayList<Person>(); 11 12 Person person1 = new Person("wang wu",24,"男"); 13 Person person2 = new Person("wang liu",24,"女"); 14 15 persons.add(person1); 16 persons.add(person2); 17 18 session.setAttribute("persons",persons); 19 20 %> 21 <a href="GetMapDemo.jsp">跳转到GetArrayDemo.jsp</a> 22 </body> 23 </html> 01 <%@page language="java" contentType="text/html;charset=gb2312"%> 02 <!DOCTYPE html> 03 <html> 04 <head> 05 <title>使用存储器读取map中的数据</title> 06 </head> 07 <body> 08 用户名1：${sessionScope.persons[0].name},${sessionScope.persons[0].age},${sessionScope.persons[0].sex}<br /> 09 用户名2：${sessionScope.persons[1].name},${sessionScope.persons[1].age},${sessionScope.persons[1].sex}<br /> 10 </body> 11 </html> | |
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