objectMapper.canSerialize SpringMVC实体转JSON字符串

 

springMVC中将实体转换为json方法中，判断是否可以写入

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1	org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter#canWrite

其中第173行

this.objectMapper.canSerialize(clazz, causeRef)

，判断是否可以序列化指定类。

 

判断是否可以序列化指定实体类.

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/**  * Method that can be called to check whether mapper thinks  * it could serialize an instance of given Class.  * Check is done  * by checking whether a serializer can be found for the type.  *<p>  * NOTE: since this method does NOT throw exceptions, but internal  * processing may, caller usually has little information as to why  * serialization would fail. If you want access to internal {@link Exception},  * call {@link #canSerialize(Class, AtomicReference)} instead.  *  * @return True if mapper can find a serializer for instances of  *  given class (potentially serializable), false otherwise (not  *  serializable)  */ public boolean canSerialize(Class<?> type) {     return _serializerProvider(getSerializationConfig()).hasSerializerFor(type, null); }   /**  * Method similar to {@link #canSerialize(Class)} but that can return  * actual {@link Throwable} that was thrown when trying to construct  * serializer: this may be useful in figuring out what the actual problem is.  *  * @since 2.3  */ public boolean canSerialize(Class<?> type, AtomicReference<Throwable> cause) {     return _serializerProvider(getSerializationConfig()).hasSerializerFor(type, cause); }