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[烧脑时刻]EL表达式1分钟完事

  1. 一天，程序员A问我，我们比比谁的知识点多，反应快。我回答：那就看谁最快用EL表达式的显示在页面上吧。
  2. 话不多说，计时开始。
  3. 2017-03-22_175555
  4. 项目的结构如上，大概就是一个Family的JavaBean，一个jsp页面，再加上Tomcat的包
  5. Family.java 
  6.  1 package com.chan.basic.domain;
 2 
 3 /**
 4  * Created by Chan on 2017/3/21.
 5  */
 6 public class Family {
 7     private String wife;
 8     private String cat;
 9     private String children;
10     private String dog;
11 
12     public String getWife() {
13         return wife;
14     }
15 
16     public void setWife(String wife) {
17         this.wife = wife;
18     }
19 
20     public String getCat() {
21         return cat;
22     }
23 
24     public void setCat(String cat) {
25         this.cat = cat;
26     }
27 
28     public String getChildren() {
29         return children;
30     }
31 
32     public void setChildren(String children) {
33         this.children = children;
34     }
35 
36     public String getDog() {
37         return dog;
38     }
39 
40     public void setDog(String dog) {
41         this.dog = dog;
42     }
43 }
  7. 值得一提的是IDEA，快速getter和setter的快捷键是Alt + Insert .
  8. index.jsp 
  9.  1 <%@ page import="com.chan.basic.domain.Family" %>
 2 <%--
 3   Created by IntelliJ IDEA.
 4   User: Administrator
 5   Date: 2017/3/22
 6   Time: 17:49
 7   To change this template use File | Settings | File Templates.
 8 --%>
 9 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
10 <html>
11 <head>
12     <title></title>
13 </head>
14 <body>
15 <%
16     //NEW
17     Family me =new Family();
18     //SET
19     me.setDog("Tom");
20     me.setWife("Jack");
21     me.setChildren("James");
22     me.setCat("Tomcat");
23     //REQUEST
24     request.setAttribute("myFamily",me);
25 %>
26 <h1>使用EL表达式，秒杀你</h1>
27 <%--request应为requestScope--%>
28 ${requestScope.myFamily.cat}
29 </body>
30 </html>

     

  10. 2017-03-22_175746
  11. 然后再运行Tomcat，比程序员A快了几秒，哈哈哈哈。Rolling on the floor laughing
posted @ 2017-03-22 19:51  chan_炽烽  阅读(217)  评论(0)  编辑  收藏  举报