JSP复习整理JavaBean

Posted 2020-08-07

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一、创建一个JavaBean

UserBean.java

 1 package jsp.test;
 2 
 3 public class UserBean {
 4 
 5     private String userName;
 6     private String pwd;
 7     private String name;
 8     private String gender;
 9     private int age;
10     private String email;
11     private String tel;
12     private String mphone;
13     public String getUserName() {
14         return userName;
15     }
16     public void setUserName(String userName) {
17         this.userName = userName;
18     }
19     public String getPwd() {
20         return pwd;
21     }
22     public void setPwd(String pwd) {
23         this.pwd = pwd;
24     }
25     public String getName() {
26         return name;
27     }
28     public void setName(String name) {
29         this.name = name;
30     }
31     public String getGender() {
32         return gender;
33     }
34     public void setGender(String gender) {
35         this.gender = gender;
36     }
37     public int getAge() {
38         return age;
39     }
40     public void setAge(int age) {
41         this.age = age;
42     }
43     public String getEmail() {
44         return email;
45     }
46     public void setEmail(String email) {
47         this.email = email;
48     }
49     public String getTel() {
50         return tel;
51     }
52     public void setTel(String tel) {
53         this.tel = tel;
54     }
55     public String getMphone() {
56         return mphone;
57     }
58     public void setMphone(String mphone) {
59         this.mphone = mphone;
60     }
61     
62     
63     
64 }

View Code

二、JavaBean的生命周期---------1.page范围

Counter.java

 1 package bean;
 2 
 3 public class Counter {
 4      public Counter(){
 5      }
 6      private int count=0;
 7     public int getCount() {
 8         return count;
 9     }
10     public void setCount(int count) {
11         count = count;
12     }
13      
14 }

View Code

usingCounter.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>page 类型的生命周期</title>
 8 </head>
 9 <body>
10 <jsp:useBean id="count" scope="page" class="bean.Counter"/>
11 <font color="blue">Show:page</font><br><br>
12 <br>You are the 
13 <font color=green>
14      <jsp:getProperty name="count" property="counter"/></font>Viewer
15 </body>
16 </html>

View Code

使用page计数器的值永远保持为1，不更新。。

三、JavaBean的生命周期-----------2.request

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