云音乐实现注册功能

news2025/5/18 3:46:16

1. 新建web项目 Shop_SM

2. 复制Shop资源和相关代码，实现注册功能

回顾当前配置下的加载顺序

1.MyBatis的主配置文件mybatis-config.xml （在根目录下）和工具类MyBatisUtil（注意总配置文件的路径）

2.实体类（User）

3.dao层（UserMapper.xml，UserDao接口）

3.1 Mapper文件

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.nz.dao.UserDao">
<!--启用缓存-->
    <cache></cache>
    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.nz.entity.User">
        <id column="uid" property="uid" />
        <result column="username" property="username" />
        <result column="password" property="password" />
        <result column="nickname" property="nickName" />
        <result column="create_time" property="createTime" />
    </resultMap>

    <!-- 查询list -->
    <select id="selectList" resultMap="BaseResultMap">
        select * from user
    </select>

    <!--添加-->
    <insert id="insertUser">
        insert into user(username,password,nickname)
                         values(#{username},#{password},#{nickName})
    </insert>
</mapper>

3.2 dao接口

UserDao

package com.nz.dao;

import com.nz.entity.User;

import java.util.List;

public interface UserDao {

    //查询
    public List<User> selectList();
    //添加
    public int insertUser(User user);
}

4.service层（UserService，UserServiceImpl）

4.1 Service接口

UserService

package com.nz.service;

import com.nz.entity.User;

import java.util.List;

public interface UserService {

    //查询
    public List<User> queryList();
    //注册
    public boolean addUser(User user);
}

4.2 Service实现

UserServiceImpl

package com.nz.service.impl;

import com.nz.dao.UserDao;
import com.nz.entity.User;
import com.nz.service.UserService;
import com.nz.util.MyBatisUtil;
import org.apache.ibatis.session.SqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserServiceImpl implements UserService {

    //查询
    @Override
    public List<User> queryList() {
        SqlSession sqlSession = MyBatisUtil.getSqlSession();
        UserDao userDao = sqlSession.getMapper(UserDao.class);
        List<User> list = userDao.selectList();
        System.out.print("userDao:"+userDao);
        return list;
    }

    //增加
    @Override
    public boolean addUser(User user) {
        SqlSession sqlSession = MyBatisUtil.getSqlSession();
        UserDao userDao = sqlSession.getMapper(UserDao.class);
        int i = userDao.insertUser(user);
        sqlSession.commit();
        return true;
    }

}

5.测试端（TestJunit）

package com.nz.test;

import com.nz.entity.User;
import com.nz.service.UserService;
import com.nz.service.impl.UserServiceImpl;
import org.junit.Test;

import java.util.List;

/**
 * Created by 86185 on 2023/2/1.
 */
public class TestJunit {

    @Test
    public void method(){
        UserService userService = new UserServiceImpl();
        List<User> list = userService.queryList();
        User user = list.get(1);
        boolean b1 = userService.addUser(user);
        System.out.print(b1);
    }
}

实现注册

注册跳转的页面是

uri是 /user/register

2. servlet内建UserRegisterServlet，实现跳转

@WebServlet("/user/register")需要与userRegister内的 /user/register 保持一致（如上方图）若不一致，则跳转失败

UserRegisterServlet代码如下：

package com.nz.servlet;

import com.nz.entity.User;
import com.nz.service.UserService;
import com.nz.service.impl.UserServiceImpl;
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;

/**
 * Created by 86185 on 2023/2/1.
 */
@WebServlet("/user/register")
public class UserRegisterServlet extends HttpServlet {

        public void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            System.out.print("this is user register");
            //处理请求乱码
            req.setCharacterEncoding("utf-8");
            //处理响应乱码
            resp.setContentType("text/html;charset=utf-8");
            //获得前台参数
            String username = req.getParameter("cliName");
            String nickName = req.getParameter("cliRealname");
            String password = req.getParameter("cliPassword1");
            User user = new User();
            user.setUsername(username);
            user.setNickName(nickName);
            user.setPassword(password);
            //逻辑
            UserService userService = new UserServiceImpl();
            boolean b1 = userService.addUser(user);
            //携带User参数
            req.setAttribute("user",user);
            //转发到registerOk页面
            req.getRequestDispatcher("/user/registerOk.jsp").forward(req,resp);
        }
    }

3.在实现跳转的UserRegisterServlet内打一个断点，可以看到注册的账号密码等