springboot+md5实现加密解密登录注册

 MD5：

在我们日常开发中，有一些表字段，不适合明文存储，比如各个系统登录所使用的密码，这样做可以防止，一旦数据库遭遇黑客攻击，不至于导致密码等重要数据的外泄。由于现存的Md5字典中可以查询出一些常见的Md5密文，为了防止Md5密文被破解，在加密过程中，还需要对Md5密文进行加“盐”操作，从而使Md5密文无法被轻易破解。
 

代码实现：

1 采用springboot +mybiats +md5实现简单登录注册

首先pom文件

 
        
            org.springframework.boot
            spring-boot-starter
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        

        
            org.apache.commons
            commons-lang3
            3.6
        

        
            mysql
            mysql-connector-java
            5.1.47
        
        
        
            org.projectlombok
            lombok
            1.18.6
        

        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        

        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            1.3.0
        
    

2  application.properties

#mysql连接
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver



#编码格式
spring.http.encoding.force=true
spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true



spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html
spring.thymeleaf.mode=HTML5
spring.webflux.static-path-pattern=classpath:/templates/index.html
spring.resources.static-locations=classpath:/resources/,classpath:/static/,classpath:/templates/,classpath:/config/
mybaits.type-aliases-package=com.kd.springboot_md5
mybaits.mapper-locations=classpath:com.kd.springboot_md5.dao
spirng.mvc:default-servlet-handler
#将themilef的默认缓存禁用，热加载生效
spring.thymeleaf.cache=false

#开启驼峰命名
mybatis.configuration.mapUnderscoreToCamelCase=true
#引入配置文件
mybatis.configuration.map-underscore-to-camel-case=true
#打印sql
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

3 MD5工具类

 

package com.kd.springboot_md5.common;

import org.springframework.util.DigestUtils;

import java.security.MessageDigest;

/**
 * @author Kodak
 * @version 1.0
 * @create 2019/08/04/10:30
 */
public class MD5Util {
	/***
	 * MD5加码 生成32位md5码
	 */
	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)));
	}



}

4 controller

package com.kd.springboot_md5.controller;

import com.kd.springboot_md5.common.MD5Util;
import com.kd.springboot_md5.dao.UserInfoDao;
import com.kd.springboot_md5.entity.UserInfo;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.annotation.Resource;

/**
 * @author Kodak
 * @version 1.0
 * @create 2019/08/04/10:37
 */
@Controller
public class LoginController {
	@Resource
	private UserInfoDao userInfoDao;

	@RequestMapping("register")
	public String register(UserInfo userInfo){
	String pwd=	MD5Util.string2MD5(userInfo.getPassword());
	userInfo.setPassword(pwd);
	userInfoDao.insertUser(userInfo);
		return "login";
	}
	@GetMapping("toregister")
	public String toregister(){
		return "register.html";
	}

	@RequestMapping("login")
	public String login(UserInfo userInfo){
		String pwd=MD5Util.convertMD5(MD5Util.convertMD5(userInfo.getPassword()));
		userInfo.setPassword(pwd);
		userInfoDao.queryUser(userInfo);
		return "index";
	}
}

5  entity实体bean  使用了lombok插件生成get/set方法

package com.kd.springboot_md5.entity;

import lombok.Data;

/**
 * @author Kodak
 * @version 1.0
 * @create 2019/08/04/11:27
 */
@Data
public class UserInfo {
	private int id;
	private String username;
	private String password;
}

6   dao 层

package com.kd.springboot_md5.dao;

import com.kd.springboot_md5.entity.UserInfo;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/**
 * @author Kodak
 * @version 1.0
 * @create 2019/08/04/11:29
 */
public interface UserInfoDao {
	@Select("select * from user_info where username=#{username} and password=#{password}")
	public List queryUser(UserInfo userInfo);

	@Insert("insert into user_info values(null,#{username},#{password})")
	public boolean insertUser(UserInfo userInfo);
}

 

 

结果

数据库保存的密码