WebQQ（myeclipse+sql server+web）

package com.shyhao.qq.action;

import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;


import com.opensymphony.xwork2.ActionSupport;
import com.shyhao.qq.service.LoginService;

public class CheckAction extends ActionSupport implements ServletRequestAware ServletResponseAware{
	private HttpServletRequest request; 
	private HttpServletResponse response; 

	public void setServletRequest（HttpServletRequest request） {
		this.request = request;
	}
	public void setServletResponse（HttpServletResponse response） {
		this.response = response;
	}



	public String execute（） {	
		String userName=request.getParameter（“userName“）;
		LoginService lse=new LoginService（）;
		boolean exist=lse.checkUser（userName）;
		System.out.println（“dddddddddddddddddddddddd“）;
		response.setCharacterEncoding（“UTF-8“）;
		try {
			if（exist）{
				response.getWriter（）.write（“false“）;
			}else{
				response.getWriter（）.write（“true“）;
			}
			
		} catch （IOException e） {
			e.printStackTrace（）;
		}
		return null;
	}
}