diff --git a/hutool-core/src/main/java/cn/hutool/core/map/BiMap.java b/hutool-core/src/main/java/cn/hutool/core/map/BiMap.java
index 1659b0d6e..ff37ca706 100644
--- a/hutool-core/src/main/java/cn/hutool/core/map/BiMap.java
+++ b/hutool-core/src/main/java/cn/hutool/core/map/BiMap.java
@@ -1,6 +1,8 @@
 package cn.hutool.core.map;
 
 import java.util.Map;
+import java.util.function.BiFunction;
+import java.util.function.Function;
 
 /**
  * 双向Map<br>
@@ -83,4 +85,49 @@ public class BiMap<K, V> extends MapWrapper<K, V> {
 	public K getKey(final V value) {
 		return getInverse().get(value);
 	}
+
+	@Override
+	public V putIfAbsent(final K key, final V value) {
+		if (null != this.inverse) {
+			this.inverse.putIfAbsent(value, key);
+		}
+		return super.putIfAbsent(key, value);
+	}
+
+	@Override
+	public V computeIfAbsent(final K key, final Function<? super K, ? extends V> mappingFunction) {
+		final V result = super.computeIfAbsent(key, mappingFunction);
+		resetInverseMap();
+		return result;
+	}
+
+	@Override
+	public V computeIfPresent(final K key, final BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+		final V result = super.computeIfPresent(key, remappingFunction);
+		resetInverseMap();
+		return result;
+	}
+
+	@Override
+	public V compute(final K key, final BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+		final V result = super.compute(key, remappingFunction);
+		resetInverseMap();
+		return result;
+	}
+
+	@Override
+	public V merge(final K key, final V value, final BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
+		final V result = super.merge(key, value, remappingFunction);
+		resetInverseMap();
+		return result;
+	}
+
+	/**
+	 * 重置反转的Map，如果反转map为空，则不操作。
+	 */
+	private void resetInverseMap() {
+		if (null != this.inverse) {
+			inverse = null;
+		}
+	}
 }
diff --git a/hutool-core/src/main/java/cn/hutool/core/thread/SyncFinisher.java b/hutool-core/src/main/java/cn/hutool/core/thread/SyncFinisher.java
index ebdee040a..b8cbec6dd 100644
--- a/hutool-core/src/main/java/cn/hutool/core/thread/SyncFinisher.java
+++ b/hutool-core/src/main/java/cn/hutool/core/thread/SyncFinisher.java
@@ -174,8 +174,8 @@ public class SyncFinisher implements Closeable {
 			} else {
 				this.executorService.shutdown();
 			}
+			this.executorService = null;
 		}
-		this.executorService = null;
 
 		clearWorker();
 	}
diff --git a/hutool-core/src/test/java/cn/hutool/core/map/BiMapTest.java b/hutool-core/src/test/java/cn/hutool/core/map/BiMapTest.java
index 7dc91e5f0..a26816b64 100644
--- a/hutool-core/src/test/java/cn/hutool/core/map/BiMapTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/map/BiMapTest.java
@@ -19,4 +19,26 @@ public class BiMapTest {
 		Assert.assertEquals("aaa", biMap.getKey(111));
 		Assert.assertEquals("bbb", biMap.getKey(222));
 	}
+
+	@Test
+	public void computeIfAbsentTest(){
+		final BiMap<String, Integer> biMap = new BiMap<>(new HashMap<>());
+		biMap.put("aaa", 111);
+		biMap.put("bbb", 222);
+
+		biMap.computeIfAbsent("ccc", s -> 333);
+		Assert.assertEquals(new Integer(333), biMap.get("ccc"));
+		Assert.assertEquals("ccc", biMap.getKey(333));
+	}
+
+	@Test
+	public void putIfAbsentTest(){
+		final BiMap<String, Integer> biMap = new BiMap<>(new HashMap<>());
+		biMap.put("aaa", 111);
+		biMap.put("bbb", 222);
+
+		biMap.putIfAbsent("ccc", 333);
+		Assert.assertEquals(new Integer(333), biMap.get("ccc"));
+		Assert.assertEquals("ccc", biMap.getKey(333));
+	}
 }