java.lang.Object
- org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver
- - org.springframework.web.method.annotation.ExpressionValueMethodArgumentResolver

所有已实现的接口:
HandlerMethodArgumentResolver
```
public class ExpressionValueMethodArgumentResolver
extends AbstractNamedValueMethodArgumentResolver
```
Resolves method arguments annotated with @Value.
An @Value does not have a name but gets resolved from the default value string, which may contain ${...} placeholder or Spring Expression Language #{...} expressions.
A WebDataBinder may be invoked to apply type conversion to resolved argument value.
从以下版本开始:
3.1
作者:
Rossen Stoyanchev

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
ExpressionValueMethodArgumentResolver(ConfigurableBeanFactory beanFactory)

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
`protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo`	`createNamedValueInfo(MethodParameter parameter)`	Create the `AbstractNamedValueMethodArgumentResolver.NamedValueInfo` object for the given method parameter.
`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 Object`	`resolveName(String name, MethodParameter parameter, NativeWebRequest webRequest)`	Resolve the given parameter type and value name into an argument value.
`boolean`	`supportsParameter(MethodParameter parameter)`	Whether the given method parameter is supported by this resolver.

从类继承的方法 org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver
handleMissingValue, handleResolvedValue, 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
  - ExpressionValueMethodArgumentResolver
```
public ExpressionValueMethodArgumentResolver(ConfigurableBeanFactory beanFactory)
```
    参数:
    beanFactory - a bean factory to use for resolving ${...} placeholder and #{...} SpEL expressions in default values; or null if default values are not expected to contain expressions
- 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.
    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 webRequest)
                      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)
    webRequest - 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 ServletException
```
    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:
    ServletException

类 ExpressionValueMethodArgumentResolver

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

ExpressionValueMethodArgumentResolver

方法详细资料

supportsParameter

createNamedValueInfo

resolveName

handleMissingValue