[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. 
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. 
11. 然后再运行Tomcat，比程序员A快了几秒，哈哈哈哈。