cache repair

ibzuaa-util/src/main/java/cn/ibizlab/util/cache/cache/LayeringCache.java

@@ -94,9 +94,11 @@ public class LayeringCache extends AbstractValueAdaptingCache {
 
     @Override
     public void put(Object key, Object value) {
+        if(value!=null) {
             caffeineCache.put(key, value);
             redisCache.put(key, value);
         }
+    }
 
     @Override
     public ValueWrapper putIfAbsent(Object key, Object value) {