类 ErrorsMethodArgumentResolver
- java.lang.Object
- org.springframework.web.method.annotation.ErrorsMethodArgumentResolver
- 所有已实现的接口:
HandlerMethodArgumentResolver
public class ErrorsMethodArgumentResolver extends Object implements HandlerMethodArgumentResolver
ResolvesErrors
method arguments.An
Errors
method argument is expected to appear immediately after the model attribute in the method signature. It is resolved by expecting the last two attributes added to the model to be the model attribute and itsBindingResult
.- 从以下版本开始:
- 3.1
- 作者:
- Rossen Stoyanchev, Juergen Hoeller
构造器概要
构造器 构造器 说明 ErrorsMethodArgumentResolver()
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
resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory)
Resolves a method parameter into an argument value from a given request.boolean
supportsParameter(MethodParameter parameter)
Whether the given method parameter is supported by this resolver.
构造器详细资料
ErrorsMethodArgumentResolver
public ErrorsMethodArgumentResolver()
方法详细资料
supportsParameter
public boolean supportsParameter(MethodParameter parameter)
从接口复制的说明:HandlerMethodArgumentResolver
Whether the given method parameter is supported by this resolver.- 指定者:
supportsParameter
在接口中HandlerMethodArgumentResolver
- 参数:
parameter
- the method parameter to check- 返回:
true
if this resolver supports the supplied parameter;false
otherwise
resolveArgument
@Nullable public Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer, NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception
从接口复制的说明:HandlerMethodArgumentResolver
Resolves a method parameter into an argument value from a given request. AModelAndViewContainer
provides access to the model for the request. AWebDataBinderFactory
provides a way to create aWebDataBinder
instance when needed for data binding and type conversion purposes.- 指定者:
resolveArgument
在接口中HandlerMethodArgumentResolver
- 参数:
parameter
- the method parameter to resolve. This parameter must have previously been passed toHandlerMethodArgumentResolver.supportsParameter(org.springframework.core.MethodParameter)
which must have returnedtrue
.mavContainer
- the ModelAndViewContainer for the current requestwebRequest
- the current requestbinderFactory
- a factory for creatingWebDataBinder
instances- 返回:
- the resolved argument value, or
null
if not resolvable - 抛出:
Exception
- in case of errors with the preparation of argument values