• javaBean


    javaBean

    规范类的操作由set和get来

    先实现一个这样的Peaple(我这里写错了)类

    package kooing;
    
    public class Peaple {
        private String name;
        private int age;
        private String sex;
        private boolean secret;
        public int getAge(){
            return age;
        }
        public String getName(){
            return name;
        }
        public String getSex(){
            return sex;
        }
        public boolean getSecret(){
            return secret;
        }
        public void setAge(int a){
            age=a;
        }
        public void setName(String a){
            name=a;
        }
        public void setSex(String a){
            sex=a;
        }
        public void setSecret(boolean a){
            secret=a;
        }
    }
    View Code

    然后又html提交数据

    <!DOCTYPE html>
    <html>
        <head>
            <meta charset="UTF-8">
            <title></title>
        </head>
        <body>
            <div align ="center">
                <form action="useBean.jsp" method="post">
                    <fieldset style='width=300'>
                        <legend>请填写 Person信息</legend>
                        <table align="center" width="400">
                            <tr>
                                <td align="right" style="font-weight:bold;">姓名:</td>
                                <td><input type="text" name="name" value="" style="200px;"/></td>
                            </tr>
                            <tr>
                                <td align="right" style="font-weight:bold;">年龄:</td>
                                <td><input type="text" name="age" value="" style="200px;"/></td>
                            </tr>
                            <tr>
                                <td align="right" style="font-weight:bold;">性别:</td>
                                <td>
                                    <input type="radio" name="sex" value="male冯绍峰" >male121
                                    <input type="radio" name="sex" value="female" >female
                                </td>
                            </tr>
                            <tr>
                                <td align="right" style="font-weight:bold;"></td>
                                <td>
                                    <input type="submit" name="search" value="提交" class="button">
                                </td>
                            </tr>
                        </table>
                    </fieldset>
                </form>
            </div>
        </body>
    </html>
    View Code

    用的时候要声明

    <jsp:useBean id="person1" class="kooing.Peaple" scope="page"/>

    传送数据给类

    <jsp:setProperty name="person1" property="*"/>
    或者
    <!--<jsp:setProperty name="person1" property="name" param="name"></jsp:setProperty>
    <jsp:setProperty name="person1" property="name" value="age"></jsp:setProperty>
    <jsp:setProperty name="person1" property="name" value="sex"></jsp:setProperty>

    接收数据

          姓名: <%=person1.getName()%><br>
          年龄: <%=person1.getAge()%><br>
          性别: <%=person1.getSex()%><br>
          <hr>
          使用getProperty<br>
       姓名:<jsp:getProperty name="person1" property="name"/><br>
         年龄:  <jsp:getProperty name="person1" property="age"/><br>
          性别:  <jsp:getProperty name="person1" property="sex"/>

     在同一个页面的时候貌似不用传输过去,直接声明后使用

    其实还有一个scope属性,来区分app和session的作用域(既是全站和个人的域(可以用来统计访问数

    <%@page contentType="text/html"%>
    <%@page pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <jsp:useBean id="session1" class="kooing.Counter" scope="session"></jsp:useBean>
    <jsp:useBean id="app" class="kooing.Counter" scope="application"/>
    <jsp:useBean id="page1" class="kooing.Counter" scope="page"/>
    <jsp:useBean id="request1" class="kooing.Counter" scope="request" />
    
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <title>JSP Page</title>
        </head>
        <body>
            个人:<jsp:getProperty name="session1" property="counter"/>
            <hr/>
            一共:<jsp:getProperty name="app" property="counter"/>
            <hr />
            一共:<jsp:getProperty name="page1" property="counter"/>
            <hr />
            一共:<jsp:getProperty name="request1" property="counter"/>
            <hr />
         </body>
    </html>
    View Code
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  • 原文地址:https://www.cnblogs.com/vhyc/p/6425312.html
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