接口 HandlerMethodArgumentResolver
- 所有已知实现类:
AbstractCookieValueMethodArgumentResolver,AbstractMessageConverterMethodArgumentResolver,AbstractMessageConverterMethodProcessor,AbstractNamedValueMethodArgumentResolver,AbstractWebArgumentResolverAdapter,ErrorsMethodArgumentResolver,ExpressionValueMethodArgumentResolver,HandlerMethodArgumentResolverComposite,HttpEntityMethodProcessor,MapMethodProcessor,MatrixVariableMapMethodArgumentResolver,MatrixVariableMethodArgumentResolver,ModelAttributeMethodProcessor,ModelMethodProcessor,PathVariableMapMethodArgumentResolver,PathVariableMethodArgumentResolver,RedirectAttributesMethodArgumentResolver,RequestAttributeMethodArgumentResolver,RequestHeaderMapMethodArgumentResolver,RequestHeaderMethodArgumentResolver,RequestParamMapMethodArgumentResolver,RequestParamMethodArgumentResolver,RequestPartMethodArgumentResolver,RequestResponseBodyMethodProcessor,ServletCookieValueMethodArgumentResolver,ServletModelAttributeMethodProcessor,ServletRequestMethodArgumentResolver,ServletResponseMethodArgumentResolver,ServletWebArgumentResolverAdapter,SessionAttributeMethodArgumentResolver,SessionStatusMethodArgumentResolver,UriComponentsBuilderMethodArgumentResolver
public interface HandlerMethodArgumentResolver
Strategy interface for resolving method parameters into argument values in the context of a given request.- 从以下版本开始:
- 3.1
- 作者:
- Arjen Poutsma
- 另请参阅:
HandlerMethodReturnValueHandler
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 ObjectresolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory)Resolves a method parameter into an argument value from a given request.booleansupportsParameter(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:
trueif this resolver supports the supplied parameter;falseotherwise
resolveArgument
@Nullable Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer, NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception
Resolves a method parameter into an argument value from a given request. AModelAndViewContainerprovides access to the model for the request. AWebDataBinderFactoryprovides a way to create aWebDataBinderinstance when needed for data binding and type conversion purposes.- 参数:
parameter- the method parameter to resolve. This parameter must have previously been passed tosupportsParameter(org.springframework.core.MethodParameter)which must have returnedtrue.mavContainer- the ModelAndViewContainer for the current requestwebRequest- the current requestbinderFactory- a factory for creatingWebDataBinderinstances- 返回:
- the resolved argument value, or
nullif not resolvable - 抛出:
Exception- in case of errors with the preparation of argument values