在Java中MD5、SHA、SHA256、SHA512加密的实现[工具类]

àì夳堔傛蜴生んèń 2023-02-14 10:40 18阅读 0赞

话不多说 直接上Utils：

import java.security.MessageDigest;
    
    /**
     * @author Piconjo
     * @date 2020/6/1  18:45
     */
    public class EncryptionDecryptionUtil {
        
        private enum DigestType{
        
            MD5("MD5")
            ,SHA("SHA")
            ,SHA256("SHA-256")
            ,SHA512("SHA-512");
    
            private String digestDesc;
    
            private DigestType(String digestDesc){
        
                this.digestDesc = digestDesc;
            }
    
            public String getDigestDesc() {
        
                return digestDesc;
            }
        }
    
        private final static String digest(String sourceStr,DigestType type) {
        
            char hexDigits[]={
        '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
            try {
        
                byte[] btInput = sourceStr.getBytes();
                // 获得MD5摘要算法的MessageDigest对象
                MessageDigest mdInst = MessageDigest.getInstance(type.digestDesc);
                // 使用指定的字节更新摘要
                mdInst.update(btInput);
                // 获得密文
                byte[] md = mdInst.digest();
                // 将密文转换成十六进制的字符串形式
                int j = md.length;
                char str[] = new char[j * 2];
                int k = 0;
                for (int i = 0; i < j; i++) {
        
                    byte byte0 = md[i];
                    str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                    str[k++] = hexDigits[byte0 & 0xf];
                }
                return new String(str);
            } catch (Exception e) {
        
                e.printStackTrace();
                return null;
            }
        }
    
        public final static String MD5(String s) {
        
            return digest(s, DigestType.MD5);
        }
    
        public final static String SHA(String s) {
        
            return digest(s, DigestType.SHA);
        }
    
        public final static String SHA256(String s){
        
            return digest(s, DigestType.SHA256);
        }
    
        public final static String SHA512(String s){
        
            return digest(s, DigestType.SHA512);
        }
    
    	// 单测
        public static void main(String[] args) {
        
            String sourceStr1 = "piconjo";
            String sourceStr2 = "zjitc";
    
            System.out.println(EncryptionDecryptionUtil.MD5(sourceStr1));
            System.out.println(EncryptionDecryptionUtil.MD5(sourceStr2));
    
            System.out.println(EncryptionDecryptionUtil.SHA(sourceStr1));
            System.out.println(EncryptionDecryptionUtil.SHA(sourceStr2));
    
            System.out.println(EncryptionDecryptionUtil.SHA256(sourceStr1));
            System.out.println(EncryptionDecryptionUtil.SHA256(sourceStr2));
    
            System.out.println(EncryptionDecryptionUtil.SHA512(sourceStr1));
            System.out.println(EncryptionDecryptionUtil.SHA512(sourceStr2));
    
        }
    }

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