Merge message digest util classes

dpt/src/main/java/com/luoye/dpt/util/MessageDigestUtils.java

@@ -8,6 +8,8 @@
  * @author luoyesiqiu
  */
 public class MessageDigestUtils {
+    private static final String ALGORITHM_MD5 = "md5";
+    private static final String ALGORITHM_SHA256 = "sha-256";
     public static String hash(String algorithm,byte[] input){
         StringBuilder ret = new StringBuilder();
         try {
@@ -26,4 +28,24 @@ public static String hash(String algorithm,byte[] input){
         }
         return ret.toString();
     }
+
+    public static String md5(byte[] input){
+        return hash(ALGORITHM_MD5,input);
+    }
+
+    public static String shortMd5(byte[] input){
+        return md5(input).substring(8,24);
+    }
+
+    public static String sha256(byte[] input){
+        return hash(ALGORITHM_SHA256,input);
+    }
+
+    public static String shortSha256Left(byte[] input) {
+        return sha256(input).substring(0,32);
+    }
+
+    public static String shortSha256Right(byte[] input) {
+        return sha256(input).substring(32,64);
+    }
 }