org.springframework.cache.support

类 NullValue

java.lang.Object

org.springframework.cache.support.NullValue

所有已实现的接口:

Serializable

public final class NullValue
extends Object
implements Serializable

Simple serializable class that serves as a null replacement for cache stores which otherwise do not support null values.

从以下版本开始:

4.2.2

作者:

Juergen Hoeller

另请参阅:

AbstractValueAdaptingCache, 序列化表格

字段概要

字段

限定符和类型	字段和说明
static Object	INSTANCE The canonical representation of a null replacement, as used by the default implementation of AbstractValueAdaptingCache.toStoreValue(java.lang.Object)/ AbstractValueAdaptingCache.fromStoreValue(java.lang.Object).

方法概要

限定符和类型	方法和说明
boolean	equals(Object obj)
int	hashCode()
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

字段详细资料

INSTANCE

public static final Object INSTANCE

The canonical representation of a null replacement, as used by the default implementation of AbstractValueAdaptingCache.toStoreValue(java.lang.Object)/ AbstractValueAdaptingCache.fromStoreValue(java.lang.Object).

从以下版本开始:

4.3.10

方法详细资料

equals

public boolean equals(@Nullable
                      Object obj)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object