Two methods of MD5 encryption

Catalog

One 、 Requirement specification

Two 、 be based on spring-core Tool encryption

1、 Import dependence

2、 Code

Two 、 be based on hutool Tools to encrypt

1、 Import dependence

2、 Code

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One 、 Requirement specification

• When storing passwords , It needs to be encrypted . So for safety , The password seen in the database must be encrypted , This is why the backstage staff, including the staff, can't see your true password , The reason why you can only change your password ; Here is a brief description of the use MD5 There are two ways to encrypt , One is based on spring-core Package tools MD5 encryption , One is based on hutool The encapsulated method in the tool class is encrypted ;
• In the business logic, the encryption string generated after the same password encryption is also the same , Just compare whether the generated encrypted string is the same , You can determine whether the same password has been entered .

Two 、 be based on spring-core Tool encryption

This encryption method is more flexible , You can customize the encryption method at multiple levels in the tool class ;

1、 Import dependence

      <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.1.7.RELEASE</version>
       </dependency>

2、 Code

• MD5Util.java

import org.springframework.util.DigestUtils;
// Must have Spring-core Support 
public class MD5Util {
	// There must be Spring-core Support 
	public static String getMd5Plus(String pwd){
		// First, encrypt the first layer 
		String md1 = DigestUtils.md5DigestAsHex(pwd.getBytes());
		// Intercept the first layer of encrypted ciphertext 6 position 
		String substring6 = md1.substring(0, 6);// Include before not include 
		// Then the ciphertext + front 6 Bit re encryption 
		String md5plus = DigestUtils.md5DigestAsHex((md1+substring6).getBytes());
		return md5plus;
	}
}

• test

String pwd="123456";
//033e997f49e0cff004e70b09303f670a
String md5Plus1 = MD5Util.getMd5Plus(pwd);
String login_pwd="123456";
//033e997f49e0cff004e70b09303f670a
String md5Plus2 = MD5Util.getMd5Plus(login_pwd);
//true
System.out.println(md5Plus1.equals(md5Plus2));

Two 、 be based on hutool Tools to encrypt

1、 Import dependence

       <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.7.16</version>
        </dependency>

2、 Code

String str_pwd="123456";
//e10adc3949ba59abbe56e057f20f883e
String md5Hex1 = DigestUtil.md5Hex(str_pwd);
String str_login_pwd="123456";
//e10adc3949ba59abbe56e057f20f883e
String md5Hex2 = DigestUtil.md5Hex(str_login_pwd);
//true
System.out.println(md5Hex1.equals(md5Hex2));