第一章万丈高楼，地基首要 - 3.10 实现用户登录 - 《Java 架构直通车》

在 foodie-dev-service 模块下的 UserService 类添加 queryUserForLogin 接口

package com.imooc.service;
import com.imooc.pojo.Users;
import com.imooc.pojo.bo.UserBO;
/**
 * @author 92578
 * @since 1.0
 */
public interface UserService {
    /**
     * 判断用户名是否存在
     *
     * @param username 用户名
     * @return 是否存在
     */
    public boolean queryUsernameIsExist(String username);
    /**
     * 创建用户
     *
     * @param userBO
     * @return
     */
    public Users createUser(UserBO userBO);
    // 检索用户名和密码是否匹配，用于登录
    public Users queryUserForLogin(String username, String password);
}

在 foodie-dev-service 模块下的 UserServiceImpl 类实现 queryUserForLogin 接口

package com.imooc.service.impl;

import com.imooc.enums.Sex;
import com.imooc.mapper.UsersMapper;
import com.imooc.pojo.Users;
import com.imooc.pojo.bo.UserBO;
import com.imooc.service.UserService;
import com.imooc.utils.DateUtil;
import com.imooc.utils.MD5Utils;
import org.n3r.idworker.Sid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import tk.mybatis.mapper.entity.Example;

import java.util.Date;

/**
 * @author 92578
 * @since 1.0
 */
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UsersMapper usersMapper;

    @Autowired
    private Sid sid;

    private static final String USER_FACE = "http://dp.gtimg.cn/discuzpic/0/discuz_x5_gamebbs_qq_com_forum_201306_19_1256219xc797y90heepdbh.jpg/0";

    /**
     * 判断用户名是否存在
     *
     * @param username 用户名
     * @return 是否存在
     */
    @Transactional(propagation = Propagation.SUPPORTS)
    @Override
    public boolean queryUsernameIsExist(String username) {
        Example userExample = new Example(Users.class);
        Example.Criteria userCriteria = userExample.createCriteria();

        userCriteria.andEqualTo("username", username);

        Users result = usersMapper.selectOneByExample(userExample);

        return result == null ? false : true;
    }

    /**
     * 创建用户
     *
     * @param userBO
     * @return
     */
    @Transactional(propagation = Propagation.REQUIRED)
    @Override
    public Users createUser(UserBO userBO) {
        String userId = sid.nextShort();
        Users user = new Users();
        user.setId(userId);
        user.setUsername(userBO.getUsername());
        try {
            user.setPassword(MD5Utils.getMD5Str(userBO.getPassword()));
        } catch (Exception e) {
            e.printStackTrace();
        }
        // 默认用户昵称同用户名
        user.setNickname(userBO.getUsername());
        // 默认头像
        user.setFace(USER_FACE);
        // 默认生日
        user.setBirthday(DateUtil.stringToDate("1900-01-01"));
        // 默认性别为 保密
        user.setSex(Sex.secret.type);
        user.setCreatedTime(new Date());
        user.setUpdatedTime(new Date());

        usersMapper.insert(user);

        return user;
    }

    @Transactional(propagation = Propagation.SUPPORTS)
    @Override
    public Users queryUserForLogin(String username, String password) {
        Example userExample = new Example(Users.class);
        Example.Criteria userCriteria = userExample.createCriteria();

        userCriteria.andEqualTo("username", username);
        userCriteria.andEqualTo("password", password);

        Users result = usersMapper.selectOneByExample(userExample);

        return result;
    }
}

在 foodie-dev-api 模块下的 PassportController 类实现 login 接口，因为登录的时候不需要传确认密码

package com.imooc.controller;

import com.imooc.pojo.Users;
import com.imooc.pojo.bo.UserBO;
import com.imooc.service.UserService;
import com.imooc.utils.IMOOCJSONResult;
import com.imooc.utils.MD5Utils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/**
 * @author 92578
 * @since 1.0
 */
@Api(value = "注册登录", tags = {"用于注册登录的相关接口"})
@RestController
@RequestMapping("passport")
public class PassportController {

    @Autowired
    private UserService userService;

    @ApiOperation(value = "用户名是否存在", notes = "用户名是否存在", httpMethod = "GET")
    @GetMapping("/usernameIsExist")
    public IMOOCJSONResult usernameIsExist(@RequestParam String username) {
        // 1. 判断用户名不能为空
        if (StringUtils.isBlank(username)) {
            return IMOOCJSONResult.errorMsg("用户名不能为空");
        }

        // 2. 查找注册的用户名是否存在
        boolean isExist = userService.queryUsernameIsExist(username);
        if (isExist) {
            return IMOOCJSONResult.errorMsg("用户名已经存在");
        }

        // 3. 请求成功，用户名没有重复
        return IMOOCJSONResult.ok();
    }

    @ApiOperation(value = "用户注册", notes = "用户注册", httpMethod = "POST")
    @PostMapping("/regist")
    public IMOOCJSONResult regist(@RequestBody UserBO userBO) {
        String username = userBO.getUsername();
        String password = userBO.getPassword();
        String confirmPwd = userBO.getConfirmPassword();

        // 0. 判断用户名和密码不为空
        if (StringUtils.isBlank(username) || StringUtils.isBlank(password) || StringUtils.isBlank(confirmPwd)) {
            return IMOOCJSONResult.errorMsg("用户名或密码不能为空");
        }

        // 1. 查询用户名是否存在
        boolean isExist = userService.queryUsernameIsExist(username);
        if (isExist) {
            return IMOOCJSONResult.errorMsg("用户名已经存在");
        }

        // 2. 密码长度不能少于 6 位
        if (password.length() < 6) {
            return IMOOCJSONResult.errorMsg("密码长度不能少于6");
        }

        // 3. 判断两次密码是否一致
        if (!password.equals(confirmPwd)) {
            return IMOOCJSONResult.errorMsg("两次密码输入不一致");
        }

        // 4. 实现注册
        userService.createUser(userBO);

        return IMOOCJSONResult.ok();
    }

    @ApiOperation(value = "用户登录", notes = "用户登录", httpMethod = "POST")
    @PostMapping("/login")
    public IMOOCJSONResult login(@RequestBody UserBO userBO) throws Exception {
        String username = userBO.getUsername();
        String password = userBO.getPassword();

        // 0. 判断用户名和密码不为空
        if (StringUtils.isBlank(username) || StringUtils.isBlank(password)) {
            return IMOOCJSONResult.errorMsg("用户名或密码不能为空");
        }

        // 1. 实现登录
        Users userResult = userService.queryUserForLogin(username, MD5Utils.getMD5Str(password));

        if (userResult == null){
            return IMOOCJSONResult.errorMsg("用户名或密码不正确");
        }

        return IMOOCJSONResult.ok(userResult);
    }
}

修改 foodie-dev-pojo 模块下的 UserBO 类，将 confirmPassword 设置为非必填

package com.imooc.pojo.bo;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

/**
 * Created by 92578 on 2020/8/16 13:57
 **/
@ApiModel(value = "用户对象BO", description = "从客户端，由用户传入的数据封装在此 entity 中")
public class UserBO {

    @ApiModelProperty(value = "用户名", name = "用户名", example = "imooc", required = true)
    private String username;
    @ApiModelProperty(value = "密码", name = "密码", example = "123456", required = true)
    private String password;
    @ApiModelProperty(value = "确认密码", name = "确认密码", example = "123456", required = false)
    private String confirmPassword;

    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 getConfirmPassword() {
        return confirmPassword;
    }

    public void setConfirmPassword(String confirmPassword) {
        this.confirmPassword = confirmPassword;
    }
}

启动项目，进入 http://localhost:8088/doc.html 多了一个用户登录接口

调试用户登录接口，用户名填“test”，密码填“123123”，点击“发送”，返回成功