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标题: loginTest [打印本页]

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作者: 刘邦m    时间: 2019-4-25 13:46
标题: loginTest
package cn.lbm.login.web;

import cn.lbm.login.dao.userDao;
import cn.lbm.login.domain.User;
import org.apache.commons.beanutils.BeanUtils;


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 java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;

@WebServlet("/login")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");

        /*String username = req.getParameter("username");
        String password = req.getParameter("password");
        User LoginUser = new User();
        LoginUser.setUsername(username);
        LoginUser.setPassword(password);*/
        User loginuser = new User();
        Map<String, String[]> loginMap = req.getParameterMap();

        try {
            BeanUtils.populate(loginuser, loginMap);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        userDao userDao = new userDao();
        User user = userDao.login(loginuser);

        if(user != null){
            req.setAttribute("user", user);
            req.getRequestDispatcher("/success").forward(req, resp);
        }else{
            req.getRequestDispatcher("/fail").forward(req, resp);
        }
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
}




package cn.lbm.login.web;

import cn.lbm.login.domain.User;

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 java.io.IOException;

@WebServlet("/success")
public class SuccessServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        User user =(User) req.getAttribute("user");
        resp.setContentType("text/html;charset=utf-8");
        resp.getWriter().write("恭喜您，"+user.getUsername()+"登录成功！");
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
}




package cn.lbm.login.web;

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 java.io.IOException;

@WebServlet("/fail")
public class FailServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        resp.getWriter().write("登录失败，用户名或密码错误!");
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
}





package cn.lbm.login.dao;

import cn.lbm.login.domain.User;
import cn.lbm.login.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

public class userDao {

    public User login(User lu){
        User user = null;
        JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDs());
        try{
            String sql = "select * from user where username=? and password=?";
            user = template.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class), lu.getUsername(), lu.getPassword());
        }catch (Exception e){
            System.out.println(e);
            return user;
        }

        return user;
    }

}




package cn.lbm.login.util;

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;

public class JDBCUtils {
    private static DataSource ds;

    static{
        try {
            Properties pro = new Properties();
            pro.load(JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
            ds = new DruidDataSourceFactory().createDataSource(pro);

        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static Connection getConn() throws SQLException {
        return ds.getConnection();
    }

    public static DataSource getDs(){
        return ds;
    }

    public static void close(PreparedStatement pstmt, Connection conn){
        close(null, pstmt, conn);
    }

    public static void close(ResultSet rs, PreparedStatement pstmt, Connection conn){
        if(rs != null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if(pstmt != null){
            try {
                pstmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if(conn != null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}





package cn.lbm.login.domain;

import java.util.Date;

public class User {
    private Integer id;
    private String username;
    private String password;
    private String sex;
    private Integer age;
    private String hobby;
    private Date update_time;
    private Boolean state;

    public User(){}

    public User(Integer id, String username, String password, String sex, Integer age, String hobby, Date update_time, Boolean state) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.sex = sex;
        this.age = age;
        this.hobby = hobby;
        this.update_time = update_time;
        this.state = state;
    }

    public Integer getId() {
        return id;
    }

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

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getHobby() {
        return hobby;
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }

    public Date getUpdate_time() {
        return update_time;
    }

    public void setUpdate_time(Date update_time) {
        this.update_time = update_time;
    }

    public Boolean getState() {
        return state;
    }

    public void setState(Boolean state) {
        this.state = state;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", sex='" + sex + '\'' +
                ", age=" + age +
                ", hobby='" + hobby + '\'' +
                ", update_time=" + update_time +
                ", state=" + state +
                '}';
    }
}

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