loginaction.java

ajax jsp 实现注册严整和信息自动提示

package com.ajxa.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.ajxa.struts.form.LoginForm;

public class LoginAction extends Action {

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		//LoginForm loginForm = (LoginForm) form;
		try{
			request.setCharacterEncoding("gb2312");
		}catch(Exception e){
			System.out.print(e);
		}
		  try{	//ActionErrors errors=new ActionErrors();
			     String msgStr="";
			     response.setContentType("text/xml;charset=GB2312");
			     response.setHeader("Cache-Control","no-cache");
			     String name=(String)request.getParameter("name");
			     System.out.println("name = "+name);
			     if("gong".equals(name)){ //找查数据库中有无该用户名
			     msgStr ="对不起,此用户名已经存在,请更换用户名注册!";
			    	 //errors.add("msg", new ActionError("same")) ;
			     }else{
			     msgStr ="用户未被注册,可以使用!";
			     //errors.add("msg", new ActionError("notsame")) ;
			     }
			     
			     
			 // request.setAttribute("msg", msgStr);
			    
			    response.getWriter().println("<?xml version='1.0' encoding='GB2312' ?>");
			    response.getWriter().println("<root>");
			    response.getWriter().println("<content>");
			     response.getWriter().print(msgStr);
			   response.getWriter().println("</content>");
			 response.getWriter().println("</root>");
			  response.getWriter().close();
			     }catch(Exception ex){

			     }  

		return null;
	}
}