struts2的ajax支持
浏览数:20 /
时间:2015年06月09日
struts2支持一种stream类型的Result,这种类型的Result可以直接向客户端浏览器响应二进制,文本等,
我们可以再action里面生成文本响应,然后在客户端页面动态加载该响应即可。
直接看例子:
public class LoginAction {
private String user;
private String pass;
private InputStream inputStream;
public InputStream getInput(){
return inputStream;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPass() {
return pass;
}
public void setPass(String pass) {
this.pass = pass;
}
public String login() throws UnsupportedEncodingException{
inputStream = user.equals("zhangsan")&&pass.equals("123")?
new ByteArrayInputStream("恭喜你,登录成功".getBytes("utf-8")):
new ByteArrayInputStream("登录失败".getBytes("utf-8"));
return "success";
}
}
这个Action的核心主要是getInput方法,它返回的二进制流将直接输出给浏览者,这将使用stream类型的result来完成,注意:这个getInput方法名可以随便换,但必须是这种类型get+"XXX"(应该是反射机制所用吧),这个“XXX”必须跟param为inputName的值对应!!!!
接下来看struts.xml的配置:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<package name="user" extends="struts-default">
<action name="loginAction" class="com.sinosoft.epicc.action.LoginAction" >
<result name="success" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">input</param>
</result>
</action>
</package>
</struts>
然后使用jquery封装的ajax调用:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%
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 ‘login.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="js/jquery-1.7.1.js"></script>
<script type="text/javascript">
function login(){
var userName = $("#user").val();
var password = $("#pwd").val();
$.ajax({
url : ‘loginAction!login‘,
data : {
user:userName,
pass:password
},
type : ‘post‘,
success : function(data){
$("#label").html(data);
},
error : function(){}
});
}
</script>
</head>
<body>
<div>用户名:<input type="text" name