技術標籤：log4jslf4j

1.新增依賴
把spring-boot-starter-logging的依賴排除掉，只使用slf4j-log4j12

	
	<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
			<exclusions>
				<exclusion>
					<groupId>org.springframework.boot</
 
groupId>
					<artifactId>spring-boot-starter-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<!--引入日誌依賴 抽象層 與 實現層-->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version
 
>1.7.21</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.7.21</version>
		</dependency>

2.在需要的類中新增宣告並輸出logger

 final static Logger logger = LoggerFactory.getLogger(HelloController.class);

    @GetMapping("/hello")
    public Object hello() {

        logger.debug("debug: hello~");
        logger.info("info: hello~");
        logger.warn("warn: hello~");
        logger.error("error: hello~");

        return "Hello World~";
    }

 

3.新增配置檔案log4j.properties

log4j.rootLogger=DEBUG,stdout,file
log4j.additivity.org.apache=true
#控制檯設定
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.threshold=INFO
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%-5p %c{1}:%L - %m%n
#輸出檔案設定,DailyRollingFileAppender按照每天日期生成
#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n 這個為日誌行前面的格式
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.DatePattern='.'yyyy-MM-dd-HH-mm
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
log4j.appender.file.Threshold=INFO
log4j.appender.file.append=true
log4j.appender.file.File=/workspaces/logs/foodie-api/imooc.log

日誌行

2020-12-29 18:05:51 INFO  MapperCacheDisabler:83 - Clear EntityHelper entityTableMap cache.

日誌檔案