org.springframework.core

## 接口 ParameterNameDiscoverer

- 所有已知实现类:
    DefaultParameterNameDiscoverer, KotlinReflectionParameterNameDiscoverer, LocalVariableTableParameterNameDiscoverer, PrioritizedParameterNameDiscoverer, StandardReflectionParameterNameDiscoverer

      public interface ParameterNameDiscoverer

  Interface to discover parameter names for methods and constructors.

  Parameter name discovery is not always possible, but various strategies are available to try, such as looking for debug information that may have been emitted at compile time, and looking for argname annotation values optionally accompanying AspectJ annotated methods.

  从以下版本开始:
    2.0
  作者:
    Rod Johnson, Adrian Colyer

- - ### 方法概要

    所有方法 实例方法 抽象方法
    限定符和类型 | 方法和说明
    --- | ---
    `String[]` | `getParameterNames(Constructor<?> ctor)` Return parameter names for a constructor, or `null` if they cannot be determined.
    `String[]` | `getParameterNames(Method method)` Return parameter names for a method, or `null` if they cannot be determined.

- - ### 方法详细资料

    - #### getParameterNames

          @Nullable
          String[] getParameterNames(Method method)

      Return parameter names for a method, or `null` if they cannot be determined.

      Individual entries in the array may be `null` if parameter names are only available for some parameters of the given method but not for others. However, it is recommended to use stub parameter names instead wherever feasible.

      参数:
        `method` - the method to find parameter names for
      返回:
        an array of parameter names if the names can be resolved, or `null` if they cannot

    - #### getParameterNames

          @Nullable
          String[] getParameterNames(Constructor<?> ctor)

      Return parameter names for a constructor, or `null` if they cannot be determined.

      Individual entries in the array may be `null` if parameter names are only available for some parameters of the given constructor but not for others. However, it is recommended to use stub parameter names instead wherever feasible.

      参数:
        `ctor` - the constructor to find parameter names for
      返回:
        an array of parameter names if the names can be resolved, or `null` if they cannot