jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘index.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="jquery/jquery1.8.3.js" ></script>
<script>
function testAjax(){
var username=$("#ajax_username").val();
$.post(
"Test_ajax2.action",
{username:username},
function(date){
alert(date);
}
);
}
</script>
</head>
<body>
<input type="text" id="ajax_username"><button onclick="testAjax()" >提交</button>
</body>
</html>
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>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<constant name="struts.i18n.encoding" value="utf-8"/>
<package name="example" namespace="/">
<action name="*_*" class="com.web.action.{1}Action" method="{2}">
</action>
</package>
<package name="example1" namespace="/" extends="json-default">
<action name="Test_ajax2" class="com.web.action.TestAction" method="ajax2">
</action>
</package>
</struts>
TestAction.java:
package com.web.action;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class TestAction extends ActionSupport {
private String username;
public void setUsername(String username) {
this.username = username;
}
public void ajax() throws IOException{
HttpServletResponse response=ServletActionContext.getResponse();
response.setContentType("text/html; charset=utf-8");
PrintWriter writer=response.getWriter();
//只有这样才可以获取到值，不写下面这行代码username的值为null
this.username=ServletActionContext.getRequest().getParameter("username");
writer.print("hello,"+username);
writer.flush();
writer.close();
}
public void ajax2() throws IOException{
System.out.println(1);
HttpServletResponse response=ServletActionContext.getResponse();
response.setContentType("text/html; charset=utf-8");
PrintWriter writer=response.getWriter();
writer.print("hello,"+username);
writer.flush();
writer.close();
}
}
第一种方式使用的方法是我的方法ajax()，但是使用这种方式的时候：ajax和request耦合，使用Action无法自动为username属性注入值。我暂时不知道为什么，有知道原因的告诉下，谢谢！
第二种方式使用的是方法ajax2(),这种方式的的前提是使用插件：
也就是struts中需要导入jar：
然后你的package必须继承json-default
这样你的Action就可以为ajax参数自动赋值了。
时间： 2024-10-11 03:20:09