第08讲 struts2处理数目不定的JavaBean对象

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1，在HeadFirstStruts2chapter02-02中，导入addstudents.jsp文件，
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
head>
<body>
<form action="student" method="post">
    <table>
       <tr>
           <th>姓名th>
           <th>性别th>
           <th>年龄th>
       tr>
       <tr>
           <td><input type="text" name="students[0].name"/>td>
           <td><input type="text" name="students[0].sex"/>td>
           <td><input type="text" name="students[0].age"/>td>
       tr>
       <tr>
           <td><input type="text" name="students[1].name"/>td>
           <td><input type="text" name="students[1].sex"/>td>
           <td><input type="text" name="students[1].age"/>td>
       tr>
       <tr>
           <td colspan="3">
              <input type="submit" value="提交"/>
           td>
       tr>
    table>
form>
body>
html>
2，新建com.cruise.model包，然后导入Student.java实体bean，
package com.cruise.model;

public class Student {

    private String name;
    private String sex;
    private int age;

    public String getName() {
       return name;
    }
    public void setName(String name) {
       this.name = name;
    }
    public String getSex() {
       return sex;
    }
    public void setSex(String sex) {
       this.sex = sex;
    }
    public int getAge() {
       return age;
    }
    public void setAge(int age) {
       this.age = age;
    }
    @Override
    public String toString() {
       return "Student [name=" + name + ", sex=" + sex + ", age=" + age + "]";
    }
}
3，新建StudentAction.java 实现Action接口。增加的list集合，便利前台的数据。注意：这里的students集合一定要和addstudents.jsp中的students[0].name一直。
package com.cruise.action;

import java.util.List;

import com.cruise.model.Student;
import com.opensymphony.xwork2.Action;

public class StudentAction implements Action{

    private List<Student> students ;

    public List<Student> getStudents() {
       return students;
    }

    public void setStudents(List<Student> students) {
       this.students = students;
    }

    @Override
    public String execute() throws Exception {
       if (students!=null) {
           for(Student stu :students){
              System.out.println(stu);
           }
       }
       return "success";
    }
}

4，修改struts.xml中的action，
xml version="1.0" encoding="UTF-8" ?>
DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
<package name="suibiandingyi" extends="struts-default">
    <action name="hobby" class="com.cruise.action.HobbyAction">
       <result name="success">success.jspresult>
    action>
    <action name="student" class="com.cruise.action.StudentAction">
       <result name="success">success.jspresult>
    action>
package>
struts>

5，测试