【fix sonar】MD5Util文件

jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/util/MD5Util.java

@@ -4,8 +4,12 @@ import java.security.MessageDigest;
 
 public class MD5Util {
 
+	private MD5Util(){
+
+	}
+
 	public static String byteArrayToHexString(byte b[]) {
-		StringBuffer resultSb = new StringBuffer();
+		StringBuilder resultSb = new StringBuilder();
 		for (int i = 0; i < b.length; i++){
 			resultSb.append(byteToHexString(b[i]));
 		}
@@ -25,14 +29,15 @@ public class MD5Util {
 	public static String MD5Encode(String origin, String charsetname) {
 		String resultString = null;
 		try {
-			resultString = new String(origin);
+			resultString = origin;
 			MessageDigest md = MessageDigest.getInstance("MD5");
 			if (charsetname == null || "".equals(charsetname)) {
 				resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
 			} else {
 				resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
 			}
-		} catch (Exception exception) {
+		} catch (Exception e) {
+			e.printStackTrace();
 		}
 		return resultString;
 	}