org.springframework.util

## 接口 StringValueResolver

- 函数接口:
    这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。

      @FunctionalInterface
      public interface StringValueResolver

  Simple strategy interface for resolving a String value. Used by `org.springframework.beans.factory.config.ConfigurableBeanFactory`.
  从以下版本开始:
    2.5
  作者:
    Juergen Hoeller
  另请参阅:
    `org.springframework.beans.factory.config.ConfigurableBeanFactory#resolveAliases`, `org.springframework.beans.factory.config.BeanDefinitionVisitor#BeanDefinitionVisitor(StringValueResolver)`, `org.springframework.beans.factory.config.PropertyPlaceholderConfigurer`

- - ### 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` | `resolveStringValue(String strVal)` Resolve the given String value, for example parsing placeholders.

- - ### 方法详细资料

    - #### resolveStringValue

          @Nullable
          String resolveStringValue(String strVal)

      Resolve the given String value, for example parsing placeholders.
      参数:
        `strVal` - the original String value (never `null`)
      返回:
        the resolved String value (may be `null` when resolved to a null value), possibly the original String value itself (in case of no placeholders to resolve or when ignoring unresolvable placeholders)
      抛出:
        `IllegalArgumentException` - in case of an unresolvable String value