md5工具类

docs/秒杀.md

+# 秒杀方案
+
+## 1.登录功能
+
+### 1.1 两次MD5加密
+
+* 客户端:passwd=MD5(明文+固定slat)
+
+* 服务端: passwd=MD5(用户输入+随机slat)
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src/main/java/dev/lpf/seckilldemo/controller/UserController.java

+package dev.lpf.seckilldemo.controller;
+
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+import org.springframework.stereotype.Controller;
+
+/**
+ * 秒杀项目
+ * <p>
+ *  前端控制器
+ * </p>
+ *
+ * @author RunAtWorld
+ * @since 2021-01-07
+ */
+@Controller
+@RequestMapping("/user")
+@Slf4j
+public class UserController {
+
+}

src/main/java/dev/lpf/seckilldemo/mapper/UserMapper.java

+package dev.lpf.seckilldemo.mapper;
+
+import dev.lpf.seckilldemo.pojo.User;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+
+/**
+ * 秒杀项目
+ * <p>
+ *  Mapper 接口
+ * </p>
+ *
+ * @author RunAtWorld
+ * @since 2021-01-08
+ */
+public interface UserMapper extends BaseMapper<User> {
+
+}

src/main/java/dev/lpf/seckilldemo/pojo/User.java

+package dev.lpf.seckilldemo.pojo;
+
+import com.baomidou.mybatisplus.annotation.TableName;
+import java.time.LocalDateTime;
+import java.io.Serializable;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+/**
+ * 秒杀项目
+ * <p>
+ * 
+ * </p>
+ *
+ * @author RunAtWorld
+ * @since 2021-01-08
+ */
+@Data
+@EqualsAndHashCode(callSuper = false)
+@TableName("t_user")
+public class User implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 用户id,默认为手机号码
+     */
+    private Long id;
+
+    private String nickname;
+
+    /**
+     * MD5(MD5(pass明文+固定salt),salt)
+     */
+    private String passwd;
+
+    /**
+     * 盐值
+     */
+    private String salt;
+
+    /**
+     * 头像
+     */
+    private String head;
+
+    /**
+     * 注册时间
+     */
+    private LocalDateTime registerAt;
+
+    /**
+     * 最后一次登录时间
+     */
+    private LocalDateTime lastLoginDate;
+
+    /**
+     * 登录次数
+     */
+    private Integer loginCount;
+
+
+}

src/main/java/dev/lpf/seckilldemo/service/IUserService.java

+package dev.lpf.seckilldemo.service;
+
+import dev.lpf.seckilldemo.pojo.User;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+/**
+ * 秒杀项目
+ * <p>
+ *  服务类
+ * </p>
+ *
+ * @author RunAtWorld
+ * @since 2021-01-08
+ */
+public interface IUserService extends IService<User> {
+
+}

src/main/java/dev/lpf/seckilldemo/service/impl/UserServiceImpl.java

+package dev.lpf.seckilldemo.service.impl;
+
+import dev.lpf.seckilldemo.pojo.User;
+import dev.lpf.seckilldemo.mapper.UserMapper;
+import dev.lpf.seckilldemo.service.IUserService;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import org.springframework.stereotype.Service;
+
+/**
+ * 秒杀项目
+ * <p>
+ *  服务实现类
+ * </p>
+ *
+ * @author RunAtWorld
+ * @since 2021-01-08
+ */
+@Service
+public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
+
+}

src/main/java/dev/lpf/seckilldemo/utils/Md5Util.java

+package dev.lpf.seckilldemo.utils;
+
+import org.apache.commons.codec.digest.DigestUtils;
+import org.springframework.stereotype.Component;
+
+/**
+ * Md5 工具类
+ * Author:   RunAtWorld
+ * Date:     2021/1/7 23:51
+ */
+@Component
+public class Md5Util {
+    private static final String FINAL_SLAT = "1a2b3c4d";
+
+    public static String md5(String src) {
+        return DigestUtils.md5Hex(src);
+    }
+
+    /**
+     * 原始明文转成输入到数据库中的MD5
+     *
+     * @return
+     */
+    public static String oriPass2InputPass(String ori) {
+        String str = FINAL_SLAT.charAt(0) + FINAL_SLAT.charAt(2) + ori + FINAL_SLAT.charAt(5) + FINAL_SLAT.charAt(6);
+        return md5(str);
+    }
+
+    /**
+     * 加密的密码转成md5存入数据库
+     *
+     * @param inPass
+     * @param salt
+     * @return
+     */
+    public static String inputPass2DbPass(String inPass, String salt) {
+        String str = salt.charAt(5) + salt.charAt(3) + inPass + salt.charAt(1) + salt.charAt(4);
+        return md5(str);
+    }
+
+    /**
+     * 原始明文转成md5存入数据库
+     * @param ori
+     * @param salt
+     * @return
+     */
+    public static String oriPass2DbPass(String ori, String salt) {
+        return inputPass2DbPass(oriPass2InputPass(ori), salt);
+    }
+
+}

src/main/resources/mapper/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="dev.lpf.seckilldemo.mapper.UserMapper">
+
+</mapper>

src/test/java/dev/lpf/seckilldemo/utils/Md5UtilTest.java

+package dev.lpf.seckilldemo.utils;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Author:   RunAtWorld
+ * Date:     2021/1/8 0:08
+ */
+public class Md5UtilTest {
+
+    private static final Logger logger = LoggerFactory.getLogger(Md5UtilTest.class);
+
+    @Test
+    void oriPass2InputPass() {
+
+    }
+
+    @Test
+    void inputPass2DbPass() {
+    }
+
+    @Test
+    void oriPass2DbPass() {
+        logger.info("res:{}", Md5Util.oriPass2DbPass("demo12", "78332io"));
+    }
+}
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