fix:Utility classes should not have public constructors (#10019)

common/src/main/java/com/alibaba/nacos/common/utils/AbstractAssert.java

@@ -58,6 +58,9 @@
  */
 public abstract class AbstractAssert {
 
+    private AbstractAssert() {
+    }
+
     /**
      * Assert a boolean expression, throwing an {@code IllegalStateException}
      * if the expression evaluates to {@code false}.

common/src/main/java/com/alibaba/nacos/common/utils/AbstractObjectUtils.java

@@ -41,6 +41,9 @@
  */
 public abstract class AbstractObjectUtils {
 
+    private AbstractObjectUtils() {
+    }
+
     private static final int INITIAL_HASH = 7;
 
     private static final int MULTIPLIER = 31;

common/src/main/java/com/alibaba/nacos/common/utils/ArrayUtils.java

@@ -24,6 +24,9 @@
  * @author zzq
  */
 public class ArrayUtils {
+
+    private ArrayUtils() {
+    }
 
     /**
      * <p>Checks if an array of Objects is empty or {@code null}.</p>

common/src/main/java/com/alibaba/nacos/common/utils/ByteUtils.java

@@ -24,6 +24,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class ByteUtils {
+
+    private ByteUtils() {
+    }
 
     public static final byte[] EMPTY = new byte[0];
 

common/src/main/java/com/alibaba/nacos/common/utils/ClassUtils.java

@@ -43,6 +43,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class ClassUtils {
+
+    private ClassUtils() {
+    }
 
     public static final String ARRAY_SUFFIX = "[]";
 

common/src/main/java/com/alibaba/nacos/common/utils/CollectionUtils.java

@@ -35,6 +35,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class CollectionUtils {
+
+    private CollectionUtils() {
+    }
 
     /**
      * Returns the <code>index</code>-th value in <code>object</code>, throwing

common/src/main/java/com/alibaba/nacos/common/utils/ConvertUtils.java

@@ -24,6 +24,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class ConvertUtils {
+
+    private ConvertUtils() {
+    }
 
     private static final String NULL_STR = "null";
 

common/src/main/java/com/alibaba/nacos/common/utils/DateFormatUtils.java

@@ -24,6 +24,9 @@
  * @author zzq
  */
 public class DateFormatUtils {
+
+    private DateFormatUtils() {
+    }
 
     public static final String YYYYMMDD = "yyyyMMdd";
 

common/src/main/java/com/alibaba/nacos/common/utils/ExceptionUtil.java

@@ -27,6 +27,9 @@
  * @since 1.2.0
  */
 public class ExceptionUtil {
+
+    private ExceptionUtil() {
+    }
 
     /**
      * Represents an empty exception, that is, no exception occurs, only a constant.

common/src/main/java/com/alibaba/nacos/common/utils/HttpMethod.java

@@ -23,6 +23,9 @@
  * @since 0.8.0
  */
 public class HttpMethod {
+
+    private HttpMethod() {
+    }
 
     public static final String GET = "GET";
 

common/src/main/java/com/alibaba/nacos/common/utils/InetAddressValidator.java

@@ -22,6 +22,9 @@
  */
 @SuppressWarnings({"checkstyle:AbbreviationAsWordInName", "PMD.ClassNamingShouldBeCamelRule"})
 public class InetAddressValidator {
+
+    private InetAddressValidator() {
+    }
 
     private static final String PERCENT = "%";
 

common/src/main/java/com/alibaba/nacos/common/utils/InternetAddressUtil.java

@@ -27,7 +27,10 @@
  */
 @SuppressWarnings({"checkstyle:AbbreviationAsWordInName", "PMD.ClassNamingShouldBeCamelRule"})
 public class InternetAddressUtil {
-
+
+    private InternetAddressUtil() {
+    }
+
     public static final boolean PREFER_IPV6_ADDRESSES = Boolean.parseBoolean(System.getProperty("java.net.preferIPv6Addresses"));
 
     public static final String IPV6_START_MARK = "[";

common/src/main/java/com/alibaba/nacos/common/utils/IoUtils.java

@@ -46,6 +46,9 @@
  * @author nacos
  */
 public class IoUtils {
+
+    private IoUtils() {
+    }
 
     /**
      * Try decompress by GZIP from stream.

common/src/main/java/com/alibaba/nacos/common/utils/JacksonUtils.java

@@ -39,6 +39,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class JacksonUtils {
+
+    private JacksonUtils() {
+    }
 
     static ObjectMapper mapper = new ObjectMapper();
 

common/src/main/java/com/alibaba/nacos/common/utils/LoggerUtils.java

@@ -24,6 +24,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class LoggerUtils {
+
+    private LoggerUtils() {
+    }
 
     public static final String TRACE = "TRACE";
 

common/src/main/java/com/alibaba/nacos/common/utils/MD5Utils.java

@@ -26,6 +26,9 @@
  */
 @SuppressWarnings("PMD.ClassNamingShouldBeCamelRule")
 public class MD5Utils {
+
+    private MD5Utils() {
+    }
 
     private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
             'e', 'f'};

common/src/main/java/com/alibaba/nacos/common/utils/MapUtil.java

@@ -31,6 +31,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public class MapUtil {
+
+    private MapUtil() {
+    }
 
     /**
      * Null-safe check if the specified Dictionary is empty.

common/src/main/java/com/alibaba/nacos/common/utils/NamespaceUtil.java

@@ -24,6 +24,9 @@
  * @date 2020/10/12 17:56
  */
 public class NamespaceUtil {
+
+    private NamespaceUtil() {
+    }
 
     private static final String NAMESPACE_PUBLIC_KEY = "public";
 

common/src/main/java/com/alibaba/nacos/common/utils/NumberUtils.java

@@ -21,6 +21,9 @@
  * @author zzq
  */
 public class NumberUtils {
+
+    private NumberUtils() {
+    }
 
     /**
      * Convert a <code>String</code> to an <code>int</code>, returning

common/src/main/java/com/alibaba/nacos/common/utils/Preconditions.java

@@ -24,7 +24,10 @@
  * @date 2021/7/29
  */
 public class Preconditions {
-
+
+    private Preconditions() {
+    }
+
     /**
      * check precondition.
      * @param expression a boolean expression

common/src/main/java/com/alibaba/nacos/common/utils/PropertyUtils.java

@@ -22,6 +22,9 @@
  * @author Pixy Yuan on 2022/3/24
  */
 public class PropertyUtils {
+
+    private PropertyUtils() {
+    }
 
     private static final String PROCESSORS_ENV_NAME = "NACOS_COMMON_PROCESSORS";
 

common/src/main/java/com/alibaba/nacos/common/utils/RandomUtils.java

@@ -24,6 +24,9 @@
  * @author zzq
  */
 public class RandomUtils {
+
+    private RandomUtils() {
+    }
 
     /**
      * Random Object for random method.

common/src/main/java/com/alibaba/nacos/common/utils/ReflectUtils.java

@@ -28,6 +28,9 @@
  * @version $Id: ReflectUtils.java, v 0.1 2020年08月20日 12:57 PM liuzunfei Exp $
  */
 public class ReflectUtils {
+
+    private ReflectUtils() {
+    }
 
     /**
      * get filed value of  obj.

common/src/main/java/com/alibaba/nacos/common/utils/ResourceUtils.java

@@ -32,6 +32,9 @@
  * @author boyan
  */
 public class ResourceUtils {
+
+    private ResourceUtils() {
+    }
 
     private static final String CLASSPATH_PREFIX = "classpath:";
 

common/src/main/java/com/alibaba/nacos/common/utils/StringUtils.java

@@ -36,6 +36,9 @@
  * @author zzq
  */
 public class StringUtils {
+
+    private StringUtils() {
+    }
 
     public static final String DOT = ".";
 

common/src/main/java/com/alibaba/nacos/common/utils/ThreadUtils.java

@@ -29,6 +29,9 @@
  * @author <a href="mailto:[email protected]">liaochuntao</a>
  */
 public final class ThreadUtils {
+
+    private ThreadUtils() {
+    }
 
     private static final int THREAD_MULTIPLER = 2;
 

common/src/main/java/com/alibaba/nacos/common/utils/TypeUtils.java

@@ -25,6 +25,9 @@
  * @author zzq
  */
 public class TypeUtils {
+
+    private TypeUtils() {
+    }
 
     /**
      * Create a parameterized type instance.

common/src/main/java/com/alibaba/nacos/common/utils/UuidUtils.java

@@ -24,6 +24,9 @@
  * @author nkorange
  */
 public class UuidUtils {
+
+    private UuidUtils() {
+    }
 
     public static String generateUuid() {
         return UUID.randomUUID().toString();

common/src/main/java/com/alibaba/nacos/common/utils/VersionUtils.java

@@ -27,6 +27,9 @@
  * @author xingxuechao on:2019/2/27 12:32 PM
  */
 public class VersionUtils {
+
+    private VersionUtils() {
+    }
 
     public static String version;