java异步方式实现登录

本文实例为大家分享了java异步登录的具体代码，供大家参考，具体内容如下

1.LoginServletAjax.java  

package com.scce.servlet;
 
import java.io.IOException;
import java.io.PrintWriter;
 
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import net.sf.json.JSONObject;
 
import com.scce.dao.AdminUserDao;
import com.scce.pojo.AdminUser;
 
public class LoginServletAjax extends HttpServlet {
 
  @Override
  protected void service(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    request.setCharacterEncoding("utf-8");
    response.setContentType("text/html;charset=utf-8");
    String method = request.getMethod();
    if (method.equals("POST")) {
      doLoginAjax(request, response);
    } else if (method.equals("GET")) {
 
    }
 
  }
 
  public void doLoginAjax(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
     PrintWriter out = response.getWriter();
   
    // 用户名
    String username = request.getParameter("username");
    // 密码
    String password = request.getParameter("password");   
    String msg = "";
    AdminUserDao adminUserDao = new AdminUserDao();
    AdminUser adminUser = adminUserDao.queryUser(username, password);
    if (adminUser != null) {

 msg="登录成功！";
      String jsonObj=   JSONObject.fromObject(adminUser).toString();
      out.print("{"Msg":""+msg+"","rows":"+jsonObj+"}");
      System.out.println("{"Msg":""+msg+"","rows":"+jsonObj+"}");
     
    } else {
      msg="用户名或者密码不正确！";
      out.print("{"Msg":""+msg+""}");
    }
     
     
    out.flush();
    out.close();
 
  }
 
}

2.test2.html

  
    
 
    
    
    
 
 
 
    
 
    
 
    
    
    
 
    
 
    
  
 
  
 
 
    
      
    
    
      用户信息加载中......
    
 
    
 
 
  

以上就是本文的全部内容，希望对大家学习java程序设计有所帮助。