package com.serverlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** Servlet implementation class login_servlet*/
@WebServlet("/login_servlet")
public class login_servlet extends HttpServlet {private static final long serialVersionUID = 1L;/*** @see HttpServlet#HttpServlet()*/public login_servlet() {super();// TODO Auto-generated constructor stub
    }/*** @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub
         Connection conn=null;Statement stmt = null;response.setContentType("text/html;charset=utf-8");try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");//驱动PrintWriter out =response.getWriter();conn=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databasename=Company","www","www");//连接数据库stmt =conn.createStatement();String un=request.getParameter("uname");String upwd = request.getParameter("upass");//out.println(upwd+"/n");String sql = "Select sex from t_ly where name ='"+un+"'";ResultSet rs = stmt.executeQuery(sql);//执行sql语句boolean isTrue = false;//  boolean isLoginIn = false;while(rs.next()){//遍历整个数据库String pswd = rs.getString("sex");//取出数据库数据//out.println(pswd.replace(" ", ""));if(pswd.replace(" ", "").equals(upwd)){isTrue=true;out.println("欢迎您："+un);break;}else{isTrue= true;out.println("密码错误，登陆失败");}}if(isTrue==false){out.println("用户名不存在");}rs.close();stmt.close();conn.close();} catch (Exception e) {// TODO: handle exception
            e.printStackTrace();}finally{try {if(stmt!=null){stmt.close();}} catch (Exception e) {// TODO: handle exception
                }try {if(conn!=null){conn.close();}} catch (Exception e) {// TODO: handle exception
                }}}/*** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub
            doGet(request, response);}public void  destroy(){}}