spring boot 读书笔记3-Spring Boot使用slf4j进行日志记录
创建logback.xml文件
<configuration> <!-- 格式化输出:%date表示日期,%thread表示线程名,%-5level:级别从左显示5个字符宽度 %msg:日志消息,%n是换行符--> <property name="LOG_PATTERN" value="%date{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n" /> <!-- 定义日志存储的路径,不要配置相对路径 --> <property name="FILE_PATH" value="D:/logs/course03/demo.%d{yyyy-MM-dd}.%i.log" /> <!-- 控制台输出日志 --> <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <!-- 按照上面配置的LOG_PATTERN来打印日志 --> <pattern>${LOG_PATTERN}</pattern> </encoder> </appender> <!--每天生成一个日志文件,保存15天的日志文件。rollingFile是用来切分文件的 --> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>${FILE_PATH}</fileNamePattern> <!-- keep 15 days' worth of history --> <maxHistory>15</maxHistory> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <!-- 日志文件的最大大小 --> <maxFileSize>10MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> </rollingPolicy> <encoder> <pattern>${LOG_PATTERN}</pattern> </encoder> </appender> <!-- project default level --> <logger name="com.itcodai.course03" level="INFO" /> <!-- 日志输出级别 --> <root level="INFO"> <appender-ref ref="CONSOLE" /> <appender-ref ref="FILE" /> </root> </configuration>
配置application.yml
logging: config: logback.xml level: com.itcodai.course03.dao: trace
创建controller调用
package com.example.spring3.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class LogTest { private final static Logger logger = LoggerFactory.getLogger(LogTest.class); @RequestMapping("/log") public String testLog() { logger.debug("=====测试日志debug级别打印===="); logger.info("======测试日志info级别打印====="); logger.error("=====测试日志error级别打印===="); logger.warn("======测试日志warn级别打印====="); // 可以使用占位符打印出一些参数信息 String str1 = "www.baidu.com"; String str2 = "blog.csdn.net"; logger.info("======测试1:{};测试2:{}", str1, str2); return "success"; } }