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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ## JUL是什么? JUL是jdk自帶的一個日志實現,使用簡單,控制靈活,如果是小型系統或者測試程序,顯然JUL會是比log4j等更好的選擇 ## 流程 ![](https://img.kancloud.cn/ba/aa/baaac1ead3d0d3c128ff02e8d9d124df_1133x409.png) ![](https://img.kancloud.cn/01/95/0195eeaf87b0818cf70625d8762b83f2_1182x589.png) ## JUL基本使用 ### 1.使用java.util.logging.Logger的靜態方法getLogger(loggerName)來獲取或創建一個日志logger ~~~ Logger logger=Logger.getLogger("cn.maicaii.Application"); ~~~ ### 2.記錄日志 ~~~ // 輸出info級別的日志 logger.info("測試Jul"); //或者 logger.log(Level.INFO,"測試"); ~~~ ![](https://img.kancloud.cn/90/09/9009094b5b4277dd0fc6e6956d0011f8_842x116.png) ## 3.占位符輸出日志 ``` String name="Logger"; String sex="男生"; logger.log(Level.INFO,"我是{0},性別是{1}",new Object[]{name,sex}); ``` ## 4。日志級別 ### 1.SEVERE 嚴重 ### 2. WARNING 警告 ### 3. INFO 信息 ### 4. CONFIG 配置 ### 5. FINE 詳情 ### 6. FINER 較詳情 ### 7. FINEST 非常詳情
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