【fix sonar】UUIDGenerator文件

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

@@ -10,6 +10,10 @@ import java.net.InetAddress;
  */
 public class UUIDGenerator {
 
+	private UUIDGenerator(){
+
+	}
+
 
 	/**
 	 * 产生一个32位的UUID
@@ -87,9 +91,8 @@ public class UUIDGenerator {
 	private final static int toInt(byte[] bytes) {
 		int result = 0;
 		for (int i = 0; i < 4; i++) {
-			result = (result << 8) - Byte.MIN_VALUE + (int) bytes[i];
+			result = (result << 8) - (Byte.MIN_VALUE & 0xff)  + bytes[i];
 		}
 		return result;
 	}
-
 }