ajax交互Struts2的action(客户端/服务器端)_AJAX相关_

package com.action;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.xzy.UserDAO;
public class CheckUserAction extends ActionSupport{
private String user;
public String findUserByName(){
String info = null;
UserDAO userdao = new UserDAO();
if(userdao.findUserByName(user)){
//info="用户名已经被注册";
Map map = (Map)ActionContext.getContext().get("request");
map.put("info", "用户名已经被注册");
return "success";
}else{
//info="用户名可以注册";
Map map = (Map)ActionContext.getContext().get("request");
map.put("info", "用户名可以注册使用");
return "fail";
}
}

public String getUser() {
return user;
}

public void setUser(String user) {
this.user = user;
}
}

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%=request.getAttribute("info")%>