A couple of recent Core Java Technologies Tech Tips were related to the Java Logging API, found in the java.util.logging package. You may have read the recent tip titled Logging Localized Messages or ...
When there is a search exception, it is logged as a warning, but java.util.logging.Logger.warning () can not handle how the error message is constructed.
大致流程：应用app =》日志记录器Logger =》日志处理器Handler =》完成日志输出。其中，Logger与Handler过程中，还穿插着日志过滤器Filter =》日志格式化组件Formatter =》日志输出级别Level等组件。
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