Action 接收多选框的值

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在Action中接收多选框的值，有2中方式：

1.定义一个数组
2.定义一个List

checkox.jsp

<%@ 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 here</title></head><body><h3>1.使用数组接收多选框的值</h3><form action="user/common!register" method="post">爱好:<br/><input type="checkbox" name="habits" value="sports">运动<br/><input type="checkbox" name="habits" value="reading">读书<br/><input type="checkbox" name="habits" value="sleep">睡觉<br/><input type="submit" value="Register"></form><h3>2.使用List接收多选框的值</h3><form action="user/common!register2" method="post">爱好:<br/><input type="checkbox" name="habitList" value="sports">运动<br/><input type="checkbox" name="habitList" value="reading">读书<br/><input type="checkbox" name="habitList" value="sleep">睡觉<br/><input type="submit" value="Register"></form></body></html>

UserAction

package com.deppon.demo.struts;import java.util.List;import com.deppon.demo.entity.UserEntity;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.ModelDriven;public class UserAction extends ActionSupport {private static final long serialVersionUID = 7146977447328113550L;private String[] habits;private List<String> habitList;public List<String> getHabitList() {return habitList;}public void setHabitList(List<String> habitList) {this.habitList = habitList;}public String[] getHabits() {return habits;}public void setHabits(String[] habits) {this.habits = habits;}/** * 使用数组接收多选框的值 * @return */public String register() {//如果一个都没有选的话，habits会是nullif(habits != null) {for(String each : habits) {System.out.println("habits-->" + each);}}return "checkbox";}/** * 使用List接收多选框的值 * @return */public String register2() {System.out.println("habitList->" + habitList);return "checkbox";}}

struts.xml

<?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><constant name="struts.i18n.encoding" value="utf-8"></constant><constant name="struts.multipart.maxSize" value="20971520"/>    <constant name="struts.devMode" value="true" />        <package name="p_user" namespace="/user" extends="struts-default">    <action name="common" class="com.deppon.demo.struts.UserAction">    <result type="redirect">/index.jsp</result>        <result name="checkbox" type="redirect">/checkbox.jsp</result>    </action>        </package></struts>