Spring PlaceholderResolver

  • 类全路径: org.springframework.util.PropertyPlaceholderHelper.PlaceholderResolver

  • 类作用将占位符中的内容替换成属性值.

    • 假设现有属性表: user.dir = c:\home 传入参数 user.dir 会获得 c:\home
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	@FunctionalInterface
	public interface PlaceholderResolver {

		/**
		 * Resolve the supplied placeholder name to the replacement value.
		 * @param placeholderName the name of the placeholder to resolve
		 * @return the replacement value, or {@code null} if no replacement is to be made
		 */
		@Nullable
		String resolvePlaceholder(String placeholderName);
	}
  • 类图如下

PropertyPlaceholderConfigurerResolver