类 SimpleMessageConverter
- java.lang.Object
- org.springframework.messaging.converter.SimpleMessageConverter
- 所有已实现的接口:
MessageConverter
- 直接已知子类:
GenericMessageConverter
public class SimpleMessageConverter extends Object implements MessageConverter
A simple converter that simply unwraps the message payload as long as it matches the expected target class. Or reversely, simply wraps the payload in a message.Note that this converter ignores any content type information that may be present in message headers and should not be used if payload conversion is actually required.
- 从以下版本开始:
- 4.0
- 作者:
- Rossen Stoyanchev
构造器概要
构造器 构造器 说明 SimpleMessageConverter()
方法概要
所有方法 实例方法 具体方法 修饰符和类型 方法 说明 Object
fromMessage(Message<?> message, Class<?> targetClass)
Convert the payload of aMessage
from a serialized form to a typed Object of the specified target class.Message<?>
toMessage(Object payload, MessageHeaders headers)
Create aMessage
whose payload is the result of converting the given payload Object to serialized form.
构造器详细资料
SimpleMessageConverter
public SimpleMessageConverter()
方法详细资料
fromMessage
@Nullable public Object fromMessage(Message<?> message, Class<?> targetClass)
从接口复制的说明:MessageConverter
Convert the payload of aMessage
from a serialized form to a typed Object of the specified target class. TheMessageHeaders.CONTENT_TYPE
header should indicate the MIME type to convert from.If the converter does not support the specified media type or cannot perform the conversion, it should return
null
.- 指定者:
fromMessage
在接口中MessageConverter
- 参数:
message
- the input messagetargetClass
- the target class for the conversion- 返回:
- the result of the conversion, or
null
if the converter cannot perform the conversion
toMessage
public Message<?> toMessage(Object payload, @Nullable MessageHeaders headers)
从接口复制的说明:MessageConverter
Create aMessage
whose payload is the result of converting the given payload Object to serialized form. The optionalMessageHeaders
parameter may contain aMessageHeaders.CONTENT_TYPE
header to specify the target media type for the conversion and it may contain additional headers to be added to the message.If the converter does not support the specified media type or cannot perform the conversion, it should return
null
.- 指定者:
toMessage
在接口中MessageConverter
- 参数:
payload
- the Object to convertheaders
- optional headers for the message (may benull
)- 返回:
- the new message, or
null
if the converter does not support the Object type or the target media type