java.lang.Object
- org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver
- - org.springframework.web.servlet.mvc.method.annotation.PathVariableMethodArgumentResolver

所有已实现的接口:
HandlerMethodArgumentResolver, UriComponentsContributor
```
public class PathVariableMethodArgumentResolver
extends AbstractNamedValueMethodArgumentResolver
implements UriComponentsContributor
```
Resolves method arguments annotated with an @PathVariable.
An @PathVariable is a named value that gets resolved from a URI template variable. It is always required and does not have a default value to fall back on. See the base class AbstractNamedValueMethodArgumentResolver for more information on how named values are processed.
If the method parameter type is Map, the name specified in the annotation is used to resolve the URI variable String value. The value is then converted to a Map via type conversion, assuming a suitable Converter or PropertyEditor has been registered.
A WebDataBinder is invoked to apply type conversion to resolved path variable values that don't yet match the method parameter type.
从以下版本开始:
3.1
作者:
Rossen Stoyanchev, Arjen Poutsma, Juergen Hoeller

嵌套类概要
- 从类继承的嵌套类/接口 org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver
  AbstractNamedValueMethodArgumentResolver.NamedValueInfo

构造器概要
构造器
构造器说明
PathVariableMethodArgumentResolver()

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
`void`	`contributeMethodArgument(MethodParameter parameter, Object value, UriComponentsBuilder builder, Map<String,Object> uriVariables, ConversionService conversionService)`	Process the given method argument and either update the `UriComponentsBuilder` or add to the map with URI variables to use to expand the URI after all arguments are processed.
`protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo`	`createNamedValueInfo(MethodParameter parameter)`	Create the `AbstractNamedValueMethodArgumentResolver.NamedValueInfo` object for the given method parameter.
`protected String`	`formatUriValue(ConversionService cs, TypeDescriptor sourceType, Object value)`
`protected void`	`handleMissingValue(String name, MethodParameter parameter)`	Invoked when a named value is required, but `AbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest)` returned `null` and there is no default value.
`protected void`	`handleResolvedValue(Object arg, String name, MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest request)`	Invoked after a value is resolved.
`protected Object`	`resolveName(String name, MethodParameter parameter, NativeWebRequest request)`	Resolve the given parameter type and value name into an argument value.
`boolean`	`supportsParameter(MethodParameter parameter)`	Whether this contributor supports the given method parameter.

从类继承的方法 org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver
handleMissingValue, resolveArgument

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - PathVariableMethodArgumentResolver
```
public PathVariableMethodArgumentResolver()
```
- 方法详细资料
  - supportsParameter
```
public boolean supportsParameter(MethodParameter parameter)
```
    从接口复制的说明: UriComponentsContributor
    Whether this contributor supports the given method parameter.
    指定者:
    supportsParameter 在接口中 HandlerMethodArgumentResolver
    指定者:
    supportsParameter 在接口中 UriComponentsContributor
    参数:
    parameter - the method parameter to check
    返回:
    true if this resolver supports the supplied parameter; false otherwise
  - createNamedValueInfo
```
protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo createNamedValueInfo(MethodParameter parameter)
```
    从类复制的说明: AbstractNamedValueMethodArgumentResolver
    Create the AbstractNamedValueMethodArgumentResolver.NamedValueInfo object for the given method parameter. Implementations typically retrieve the method annotation by means of MethodParameter.getParameterAnnotation(Class).
    指定者:
    createNamedValueInfo 在类中 AbstractNamedValueMethodArgumentResolver
    参数:
    parameter - the method parameter
    返回:
    the named value information
  - resolveName
```
protected Object resolveName(String name,
                             MethodParameter parameter,
                             NativeWebRequest request)
                      throws Exception
```
    从类复制的说明: AbstractNamedValueMethodArgumentResolver
    Resolve the given parameter type and value name into an argument value.
    指定者:
    resolveName 在类中 AbstractNamedValueMethodArgumentResolver
    参数:
    name - the name of the value being resolved
    parameter - the method parameter to resolve to an argument value (pre-nested in case of a Optional declaration)
    request - the current request
    返回:
    the resolved argument (may be null)
    抛出:
    Exception - in case of errors
  - handleMissingValue
```
protected void handleMissingValue(String name,
                                  MethodParameter parameter)
                           throws ServletRequestBindingException
```
    从类复制的说明: AbstractNamedValueMethodArgumentResolver
    Invoked when a named value is required, but AbstractNamedValueMethodArgumentResolver.resolveName(String, MethodParameter, NativeWebRequest) returned null and there is no default value. Subclasses typically throw an exception in this case.
    覆盖:
    handleMissingValue 在类中 AbstractNamedValueMethodArgumentResolver
    参数:
    name - the name for the value
    parameter - the method parameter
    抛出:
    ServletRequestBindingException
  - handleResolvedValue
```
protected void handleResolvedValue(Object arg,
                                   String name,
                                   MethodParameter parameter,
                                   ModelAndViewContainer mavContainer,
                                   NativeWebRequest request)
```
    从类复制的说明: AbstractNamedValueMethodArgumentResolver
    Invoked after a value is resolved.
    覆盖:
    handleResolvedValue 在类中 AbstractNamedValueMethodArgumentResolver
    参数:
    arg - the resolved argument value
    name - the argument name
    parameter - the argument parameter type
    mavContainer - the ModelAndViewContainer (may be null)
    request - the current request
  - contributeMethodArgument
```
public void contributeMethodArgument(MethodParameter parameter,
                                     Object value,
                                     UriComponentsBuilder builder,
                                     Map<String,Object> uriVariables,
                                     ConversionService conversionService)
```
    从接口复制的说明: UriComponentsContributor
    Process the given method argument and either update the UriComponentsBuilder or add to the map with URI variables to use to expand the URI after all arguments are processed.
    指定者:
    contributeMethodArgument 在接口中 UriComponentsContributor
    参数:
    parameter - the controller method parameter (never null)
    value - the argument value (possibly null)
    builder - the builder to update (never null)
    uriVariables - a map to add URI variables to (never null)
    conversionService - a ConversionService to format values as Strings
  - formatUriValue
```
protected String formatUriValue(ConversionService cs,
                                TypeDescriptor sourceType,
                                Object value)
```

类 PathVariableMethodArgumentResolver

嵌套类概要

从类继承的嵌套类/接口 org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver

构造器概要

方法概要

从类继承的方法 org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver

从类继承的方法 java.lang.Object

构造器详细资料

PathVariableMethodArgumentResolver

方法详细资料

supportsParameter

createNamedValueInfo

resolveName

handleMissingValue

handleResolvedValue

contributeMethodArgument

formatUriValue