添加日志依赖，方便测试时进行日志输出。

src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java

@@ -2,21 +2,27 @@ package xyz.zhouxy.plusone.commons;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Test;
 
 import xyz.zhouxy.plusone.commons.util.Enumeration;
 
+import javax.annotation.Nonnull;
+import java.util.Collection;
+
+@Slf4j
 class EnumerationTests {
 
     @Test
     void testEnumeration() {
         assertEquals(EntityStatus.AVAILABLE, EntityStatus.of(0));
+        log.info(EntityStatus.constants().toString());
     }
 }
 
 final class EntityStatus extends Enumeration<EntityStatus> {
 
-    private EntityStatus(int value, String name) {
+    private EntityStatus(int value, @Nonnull String name) {
         super(value, name);
     }
 
@@ -24,16 +30,16 @@ final class EntityStatus extends Enumeration<EntityStatus> {
     public static final EntityStatus AVAILABLE = new EntityStatus(0, "正常");
     public static final EntityStatus DISABLED = new EntityStatus(1, "禁用");
 
-    private static final EnumerationValuesHolder<EntityStatus> ENUMERATION_VALUES = new EnumerationValuesHolder<>(
-            AVAILABLE,
-            DISABLED);
+    private static final ValueSet<EntityStatus> ENUMERATION_VALUES = new ValueSet<>(
+            AVAILABLE, DISABLED);
 
+    @Nonnull
     public static EntityStatus of(int value) {
         return ENUMERATION_VALUES.get(value);
     }
 
-    @Override
-    public String toString() {
-        return "EntityStatus" + super.toString();
+    @Nonnull
+    public static Collection<EntityStatus> constants() {
+        return ENUMERATION_VALUES.getValues();
     }
-}
+}