2021-11-04

package conm.java.pojo;

public class Lmp {
    private int id;
    private  String name;
    private  String pwd;

    @Override
    public String toString() {
        return "Lmp{" +
                "id=" + id +
                ", name='" + name + ''' +
                ", pwd='" + pwd + ''' +
                '}';
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public Lmp() {
    }

    public Lmp(int id, String name, String pwd) {
        this.id = id;
        this.name = name;
        this.pwd = pwd;
    }
}

package conm.java.ul;

import com.mchange.v2.c3p0.ComboPooledDataSource;

import javax.sql.DataSource;

public class Db {
    public static DataSource getDatll(){
        ComboPooledDataSource cs = new ComboPooledDataSource();
        return cs;

    }
}

package conm.java.dao;

import conm.java.pojo.Lmp;

public interface DaoLmp {
    Lmp getLmpNmae(String name);
}

package conm.java.dao.imp;

import conm.java.dao.DaoLmp;
import conm.java.pojo.Lmp;
import conm.java.ul.Db;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.List;

public class DaoLmpimp implements DaoLmp {
   private QueryRunner qr=new QueryRunner(Db.getDatll());
    @Override
    public Lmp getLmpNmae(String name) {
         Lmp lmp=null;
        String sql="select * from cc where name=?";
        try {
            lmp = qr.query(sql, new BeanHandler<>(Lmp.class), name);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }

        return lmp;
    }
}

package conm.java.serlet;

import conm.java.pojo.Lmp;

public interface SerletLmp {
boolean longin(String name, String pwd);
}

package conm.java.serlet.imp;

import conm.java.dao.DaoLmp;
import conm.java.dao.imp.DaoLmpimp;
import conm.java.pojo.Lmp;
import conm.java.serlet.SerletLmp;

public class SerletLmpimp implements SerletLmp {
    private DaoLmp daoLmp=new DaoLmpimp();
    @Override
    public boolean longin(String name, String pwd) {
        Lmp lmpNmae = daoLmp.getLmpNmae(name);
        if (lmpNmae!=null&&lmpNmae.getPwd().equals(pwd)){
            return true;
        }
        return false;
    }
}

package conm.java.test;

import conm.java.serlet.SerletLmp;
import conm.java.serlet.imp.SerletLmpimp;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/login")
public class Servlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
   request.setCharacterEncoding("UTF-8");
   response.setContentType("text/html;charset=utf-8");
        String name = request.getParameter("name");
        String pwd = request.getParameter("pwd");
        SerletLmp serletLmp =new SerletLmpimp();
        HttpSession session = request.getSession();
       session.setAttribute("name",name);
        boolean lo = serletLmp.longin(name,pwd);
        if(lo){
            response.sendRedirect(request.getContextPath()+"/kk.jsp");
        }else {
            response.getWriter().print("你重写，写错了");
        }


    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 doPost(request, response);
    }
}

package conm.java.test;

import conm.java.serlet.SerletLmp;
import conm.java.serlet.imp.SerletLmpimp;
import org.junit.Test;

public class LemTest {
    private SerletLmp serletLmp =new SerletLmpimp();
    @Test
    public void test(){
        boolean longin = serletLmp.longin("admin","123");
        if (longin){
            System.out.println("登录成功");
        }else {
            System.out.println("用户名或密码错误");
        }
    }
}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>



    
    
    
    
    



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