接口 HandlerMethodArgumentResolver
- 所有已知实现类:
AbstractNamedValueMethodArgumentResolver
,DestinationVariableMethodArgumentResolver
,HandlerMethodArgumentResolverComposite
,HeaderMethodArgumentResolver
,HeadersMethodArgumentResolver
,MessageMethodArgumentResolver
,PayloadArgumentResolver
,PrincipalMethodArgumentResolver
public interface HandlerMethodArgumentResolver
Strategy interface for resolving method parameters into argument values in the context of a givenMessage
.- 从以下版本开始:
- 4.0
- 作者:
- Rossen Stoyanchev
方法概要
所有方法 实例方法 抽象方法 修饰符和类型 方法 说明 Object
resolveArgument(MethodParameter parameter, Message<?> message)
Resolves a method parameter into an argument value from a given message.boolean
supportsParameter(MethodParameter parameter)
Whether the given method parameter is supported by this resolver.
方法详细资料
supportsParameter
boolean supportsParameter(MethodParameter parameter)
Whether the given method parameter is supported by this resolver.- 参数:
parameter
- the method parameter to check- 返回:
true
if this resolver supports the supplied parameter;false
otherwise
resolveArgument
Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception
Resolves a method parameter into an argument value from a given message.- 参数:
parameter
- the method parameter to resolve. This parameter must have previously been passed tosupportsParameter(org.springframework.core.MethodParameter)
which must have returnedtrue
.message
- the currently processed message- 返回:
- the resolved argument value, or
null
- 抛出:
Exception
- in case of errors with the preparation of argument values