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struts2_day02_05-获取表单数据（使用ActionContext获取）

2017-12-01 15:36 375 查看

项目结构：

/struts2_day02/WebContent/form1.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>

<form action="${pageContext.request.contextPath }/form1.action" method="post">
username:<input type="text" name="username"><br>
password:<input type="text" name="password"><br>
address:<input type="text" name="address"><br>
<input type="submit" value="提交">
</form>

</body>
</html>

/struts2_day02/src/struts.xml

<?xml version="1.0" encoding="UTF-8"?>


<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">


<struts>

<package name="demo1" extends="struts-default" namespace="/">


<global-results>
<result name="success">/hello.jsp</result>
</global-results>

<action name="book" class="com.hlg.action.BookAction">
<result name="success" type="redirectAction">orders</result>
</action>
<action name="orders" class="com.hlg.action.OrdersAction">

</action>
</package>

<package name="from1action" extends="struts-default" namespace="/">
<action name="form1" class="com.hlg.form.Form1DemoAction">
</action>
</package>

</struts>

com.hlg.form.Form1DemoAction
package com.hlg.form;

import java.util.Arrays;
import java.util.Map;
import java.util.Set;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class Form1DemoAction extends ActionSupport {

public String execute(){

//第一种方式使用ActionContext类获取
//1 获取ActionContext对象
ActionContext context = ActionContext.getContext();
//2调用方法得到表单数据
//key是表单输入项name属性值，value是输入的值
Map<String, Object> map =context.getParameters();
Set<String> kes = map.keySet();

for (String key : kes) {
//根据key得到value
//数组形式：因为输入项里面可能有复选框的情况
Object[] obj = (Object[]) map.get(key);
System.out.println(Arrays.toString(obj));
}

return NONE;
}
}

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