使用SpringBoot进行MD5加密登录注册功能的实现

一、项目架构

pom.xml配置
注意添加MD5的依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springboot_test</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot_test</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>

        <dependency>
            <groupId>com.jna</groupId>
            <artifactId>jna-sdk</artifactId>
            <version>4.0.0</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.60</version>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0</version>
        </dependency>

        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>me.zzp</groupId>
            <artifactId>district</artifactId>
            <version>1.2.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>

        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.12</version>
        </dependency>
        <!--MD5加密-->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.14</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

数据库设计：

实体类：Admin.java

package com.example.springboot_test.entity;

import lombok.Data;

@Data
public class Admin {
    private Integer id;

    private String userName;

    private String pwd;

}

MD5工具类：
注：这里采用的是工具类，也可以使用spring boot自带的MD5加密

package com.example.springboot_test.utils;

import java.security.MessageDigest;

public class MD5Utils {
    public static String string2MD5(String inStr) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++) {
            byteArray[i] = (byte) charArray[i];
        }
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16){
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();

    }

    /**
     * 加密解密算法 执行一次加密，两次解密
     */
    public static String convertMD5(String inStr) {

        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++) {
            a[i] = (char) (a[i] ^ 't');
        }
        String s = new String(a);
        return s;

    }

    // 测试主函数
    public static void main(String args[]) {
        String s = "Kodak";
        System.out.println("原始：" + s);
        System.out.println("MD5后：" + string2MD5(s));
        System.out.println("加密的：" + convertMD5(s));
        System.out.println("解密的：" + convertMD5(convertMD5(s)));
    }

}

xml文件

<?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.example.springboot_test.mapper.AdminMapper">
    <resultMap id="BaseResultMap" type="com.example.springboot_test.entity.Admin">
        <id column="id" jdbcType="INTEGER" property="id" />
        <result column="user_name" jdbcType="VARCHAR" property="userName" />
        <result column="pwd" property="pwd"></result>
    </resultMap>
<!--登录-->
    <select id="login" resultType="com.example.springboot_test.entity.Admin" resultMap="BaseResultMap">
        select id,user_name,pwd
        from admin
        where id=#{id} and user_name=#{userName}and pwd=#{pwd}
    </select>
    <!--注册--->
    <insert id="register" parameterType="com.example.springboot_test.entity.Admin">
        insert into admin
        (id,user_name,pwd)
        values
        (#{id},#{userName},#{pwd})
    </insert>
    <!---根据id找数据库里的内容进行注册判断-->
    <select id="getAdminById" resultMap="BaseResultMap">
        select id,user_name,pwd from admin
        where id=#{id}
    </select>
      <!---根据userName找数据库里的内容进行登录判断-->
    <select id="getAdminByUserName" resultMap="BaseResultMap">
        select * from
        admin
        where user_name=#{userName}
    </select>
</mapper>

AdminMapper

package com.example.springboot_test.mapper;

import com.example.springboot_test.entity.Admin;
import org.springframework.stereotype.Repository;

@Repository
public interface AdminMapper {
    //登录
    Admin login(Admin admin);
   //注册
    int register(Admin admin);

    Admin getAdminById(Integer id);

   Admin getAdminByUserName(String userName);
}

业务层接口：AdminSevice

package com.example.springboot_test.mapper;

import com.example.springboot_test.entity.Admin;
import org.springframework.stereotype.Repository;

@Repository
public interface AdminMapper {
    //登录
    Admin login(Admin admin);
   //注册
    int register(Admin admin);

    Admin getAdminById(Integer id);

   Admin getAdminByUserName(String userName);
}

业务层接口实现类：AdminServiceImpl
注意这里的对于注册和登录进行的判断
1.已经注册了怎么办
2.密码或登录名不正确怎么办

package com.example.springboot_test.service.impl;

import com.example.springboot_test.entity.Admin;
import com.example.springboot_test.mapper.AdminMapper;
import com.example.springboot_test.service.AdminService;
import com.example.springboot_test.utils.MD5Utils;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class AdminServiceImpl implements AdminService {
    @Resource
    AdminMapper adminMapper;


    @Override
    public String login(Admin admin) {
        //1、查询登录账号的登录信息（查到/未查到）
        String userName=admin.getUserName();
        Admin result = adminMapper.getAdminByUserName(userName);
        if (result == null) {
            return "登录失败";
        } else {
            //2、判断登录密码和库里面密码是否一致
            String pwd1 = MD5Utils.string2MD5(admin.getPwd());
            if (pwd1.equals(result.getPwd())) {
                return "登录成功";
            } else {
                return "登录失败";
            }
        }

    }

    @Override
    public String register(Admin admin) {
        //1、判断用户账号是否已注册（已注册/未注册）
        Integer id = admin.getId();
        // String pwd=admin.getPwd();
//        admin.setUserName(userName);
        //admin.setPwd(pwd);
        Admin result = adminMapper.getAdminById(id);
        if (result != null) {
            return "账号已注册";
        } else {
            String pwd = MD5Utils.string2MD5(admin.getPwd());
            admin.setPwd(pwd);
            //2、未注册，则密码加密存库
            adminMapper.register(admin);
            return "注册成功";


        }
    }
}

控制层：AdminController

package com.example.springboot_test.controller;

import com.example.springboot_test.entity.Admin;
import com.example.springboot_test.service.AdminService;
import com.example.springboot_test.utils.MD5Utils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
@ResponseBody
public class AdminController {
    @Autowired
    AdminService adminService;


    /**
     * 注册
     *
     * @param admin
     * @return
     */
    @GetMapping("/register")
    public String register(@Validated Admin admin) {
//        String pwd = MD5Utils.string2MD5(admin.getPwd());
//        admin.setPwd(pwd);

        return adminService.register(admin);

    }

    /**
     * 登录
     */
    @GetMapping("/login")
    public String login(Admin admin) {

//        String pwd1 = MD5Utils.convertMD5(MD5Utils.convertMD5(admin.getPwd()));
//        admin.setPwd(pwd1);

            return adminService.login(admin);


    }
}

本文地址：https://blog.csdn.net/sfz1234567890/article/details/112565879