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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                **1. 日志級別API** ```java import org.junit.jupiter.api.Test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.boot.test.context.SpringBootTest; @SpringBootTest class LoggingApplicationTests { private Logger logger = LoggerFactory.getLogger(this.getClass()); @Test void contextLoads() { //SpringBoot中的日志級別默認為info,大于等于該級別的日志可以進行輸出,小于該級別的日志不輸出。 //下面的方法對應的日志級別為從低——>高. logger.trace("trace日志..."); logger.debug("debug日志..."); logger.info("info日志..."); logger.warn("warn日志..."); logger.error("error日志..."); } } ``` 輸出如下,低于info級別的日志不輸出: ```java 2020-11-05 15:52:38.199 INFO 6804 --- [ main] c.e.logging.LoggingApplicationTests : info日志... 2020-11-05 15:52:38.199 WARN 6804 --- [ main] c.e.logging.LoggingApplicationTests : warn日志... 2020-11-05 15:52:38.199 ERROR 6804 --- [ main] c.e.logging.LoggingApplicationTests : error日志... ``` <br/> **2. 日志配置** *`resources/application.properties`* ```xml #將項目的com.example包及子包的日志級別設置為trace logging.level.com.example=trace #指定日志的輸出位置 #當沒有指定具體的盤符路徑,默認輸出的spring.log文件位于項目的根目錄下 #當指定具體的盤符路徑,如果e:/spring.log則輸出到e:/spring.log位置 logging.file.name=spring.log #指定日志的輸出位置 #當沒有指定具體的盤符路徑,則輸出為 項目的盤符路徑/logging/spring.log #沒有指定日志文件,SpringBoot默認提供spring.log文件 logging.file.path=/logging/ #如果logging.file.path 和 logging.file.name 都沒有設置,則就只是單單地輸出在IDEA的控制臺上 #如果logging.file.path 和 logging.file.name 同時配置,則以logging.file.name為準 #日志是用來記錄信息的,所以運行多次程序spring.log會將日志信息追加在已有日志的末尾,而不是覆蓋原有日志 #在控制臺輸出的日志的格式 1ogging.pattern.console= 日志格式輸出百度一下吧! #指定文件中日志輸出的格式 1ogging.pattern.file= 日志格式輸出百度一下吧! ``` 更改日志級別為`trace`后,再次運行,輸出如下: ```java 2020-11-05 16:06:32.207 TRACE 16968 --- [ main] c.e.logging.LoggingApplicationTests : trace日志... 2020-11-05 16:06:32.207 DEBUG 16968 --- [ main] c.e.logging.LoggingApplicationTests : debug日志... 2020-11-05 16:06:32.207 INFO 16968 --- [ main] c.e.logging.LoggingApplicationTests : info日志... 2020-11-05 16:06:32.207 WARN 16968 --- [ main] c.e.logging.LoggingApplicationTests : warn日志... 2020-11-05 16:06:32.207 ERROR 16968 --- [ main] c.e.logging.LoggingApplicationTests : error日志... ```
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