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【SpringBoot】实战-开发接口-用户-注册

news 2025/7/19 23:51:24

注册

界面

接口文档

总体思路

代码编写

1.实体类

通过查看接口文档，我们可以看出响应数据都有都包含code，message，data三个属性，所以建立result实体类

package com.zwh.bojo;import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;//统一响应结果
@NoArgsConstructor//创建没有参数的构造函数
@AllArgsConstructor//创建全参数的构造函数
public class Result<T> {private Integer code;//业务状态码  0-成功  1-失败private String message;//提示信息private T data;//响应数据 泛型//快速返回操作成功响应结果(带响应数据)public static <E> Result<E> success(E data) {return new Result<>(0, "操作成功", data);}//快速返回操作成功响应结果public static Result success() {return new Result(0, "操作成功", null);}public static Result error(String message) {return new Result(1, message, null);}
}

2.Controller（控制器）类

package com.zwh.controller;import com.zwh.bojo.Result;
import com.zwh.bojo.User;
import com.zwh.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;@PostMapping("/register")public Result register(String username, String password) {//查询用户User user = userService.findByUsername(username);//注册if (user == null) {userService.register(username, password);return Result.success();}else {return Result.error("注册失败：用户名已经被占用");}}
}

3.Service接口类

package com.zwh.service;import com.zwh.bojo.User;public interface UserService {public User findByUsername(String username);public void register(String username, String password);
}

4.Impl接口实现

package com.zwh.service.impl;import com.zwh.bojo.User;
import com.zwh.mapper.UserMapper;
import com.zwh.service.UserService;
import com.zwh.utils.Md5Util;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UserMapper userMapper;//根据用户名查询对象@Overridepublic User findByUsername(String username) {User user = userMapper.findByUsername(username);return user;}@Overridepublic void register(String username, String password) {//加密String passwordMd5 = Md5Util.getMD5String(password);//添加userMapper.register(username,passwordMd5);}
}

5.Mapper类

package com.zwh.mapper;import com.zwh.bojo.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;@Mapper
public interface UserMapper {@Select("select * from public.user where username = #{username}")User findByUsername(String username);@Insert("insert into public.user(username,password,create_time,update_time) values(#{username},#{password},now(),now())" )void register(String username, String password);
}

6.工具类

package com.zwh.utils;import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;public class Md5Util {/*** 默认的密码字符串组合，用来将字节转换成 16 进制表示的字符,apache校验下载的文件的正确性用的就是默认的这个组合*/protected static char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};protected static MessageDigest messagedigest = null;static {try {messagedigest = MessageDigest.getInstance("MD5");} catch (NoSuchAlgorithmException nsaex) {System.err.println(Md5Util.class.getName() + "初始化失败，MessageDigest不支持MD5Util。");nsaex.printStackTrace();}}/*** 生成字符串的md5校验值** @param s* @return*/public static String getMD5String(String s) {return getMD5String(s.getBytes());}/*** 判断字符串的md5校验码是否与一个已知的md5码相匹配** @param password  要校验的字符串* @param md5PwdStr 已知的md5校验码* @return*/public static boolean checkPassword(String password, String md5PwdStr) {String s = getMD5String(password);return s.equals(md5PwdStr);}public static String getMD5String(byte[] bytes) {messagedigest.update(bytes);return bufferToHex(messagedigest.digest());}private static String bufferToHex(byte bytes[]) {return bufferToHex(bytes, 0, bytes.length);}private static String bufferToHex(byte bytes[], int m, int n) {StringBuffer stringbuffer = new StringBuffer(2 * n);int k = m + n;for (int l = m; l < k; l++) {appendHexPair(bytes[l], stringbuffer);}return stringbuffer.toString();}private static void appendHexPair(byte bt, StringBuffer stringbuffer) {char c0 = hexDigits[(bt & 0xf0) >> 4];// 取字节中高 4 位的数字转换, >>>// 为逻辑右移，将符号位一起右移,此处未发现两种符号有何不同char c1 = hexDigits[bt & 0xf];// 取字节中低 4 位的数字转换stringbuffer.append(c0);stringbuffer.append(c1);}}