Spring Boot 配置 SLF4J日志

深藏阁楼爱情的钟 2022-11-08 06:05 237阅读 0赞

## 1 SLF4J日志 ##

SLF4J，即简单日志门面（Simple Logging Facade for Java），不是具体的日志解决方案，它只服务于各种各样的日志系统。

SLF4J是为各种loging APIs提供一个简单统一的接口，从而使得最终用户能够在部署的时候配置自己希望的loging APIs实现。

Logging API实现既可以选择直接实现SLF4J接的loging APIs如： NLOG4J、SimpleLogger。也可以通过SLF4J提供的API实现来开发相应的适配器如Log4jLoggerAdapter、JDK14LoggerAdapter。

## 2 logback.xml（配置文件） ##

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>
        
        
    	
        
    	<property name="log.path" value="d:/logs" />
        
    	<property name="log.pattern" value="%d{HH:mm:ss.SSS} [%thread] %-5level %logger{20} - [%method,%line] - %msg%n" />
    
    	
    	<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
    		<encoder>
    			<pattern>${log.pattern}</pattern>
    		</encoder>
    	</appender>
    
    	
    	<appender name="file_info" class="ch.qos.logback.core.rolling.RollingFileAppender">
    	    <file>${log.path}/sys-info.log</file>
            
    		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
    			<fileNamePattern>${log.path}/sys-info.%d{yyyy-MM-dd}.log</fileNamePattern>
    			
    			<maxHistory>60</maxHistory>
    		</rollingPolicy>
    		<encoder>
    			<pattern>${log.pattern}</pattern>
    		</encoder>
    		<filter class="ch.qos.logback.classic.filter.LevelFilter">
                
                <level>INFO</level>
                
                <onMatch>ACCEPT</onMatch>
                
                <onMismatch>DENY</onMismatch>
            </filter>
    	</appender>
    
    	<appender name="file_error" class="ch.qos.logback.core.rolling.RollingFileAppender">
    	    <file>${log.path}/sys-error.log</file>
            
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>${log.path}/sys-error.%d{yyyy-MM-dd}.log</fileNamePattern>
    			
    			<maxHistory>60</maxHistory>
            </rollingPolicy>
            <encoder>
                <pattern>${log.pattern}</pattern>
            </encoder>
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                
                <level>ERROR</level>
    			
                <onMatch>ACCEPT</onMatch>
    			
                <onMismatch>DENY</onMismatch>
            </filter>
        </appender>
    
    	
        <appender name="sys-user" class="ch.qos.logback.core.rolling.RollingFileAppender">
    		<file>${log.path}/sys-user.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                
                <fileNamePattern>${log.path}/sys-user.%d{yyyy-MM-dd}.log</fileNamePattern>
                
                <maxHistory>60</maxHistory>
            </rollingPolicy>
            <encoder>
                <pattern>${log.pattern}</pattern>
            </encoder>
        </appender>
    
    	
    	<logger name="com" level="info" />
    	
    	<logger name="org.springframework" level="warn" />
    
    	<root level="info">
    		<appender-ref ref="console" />
    	</root>
    
    	
        <root level="info">
            <appender-ref ref="file_info" />
            <appender-ref ref="file_error" />
        </root>
    
    	
        <logger name="sys-user" level="info">
            <appender-ref ref="sys-user"/>
        </logger>
    </configuration>

## 3 application.properties ##

## 日志配置
    logging.config=src/main/resources/logback.xml
    logging.level.com=trace

## 4 打印日志 ##

package com;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class TestConfigApplication {
    	private static final Logger logger = LoggerFactory.getLogger(TestConfigApplication.class);
    	public static void main(String[] args) {
    		SpringApplication.run(TestConfigApplication.class, args);
    		logger.error("这是error信息");
    		logger.warn("这是warn信息");
    		logger.info("这是info信息");
    		logger.debug("这是debug信息");
    	}
    
    }

## 5 调试结果 ##

### 5.1 控制台打印结果  ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70][]

### 5.2 日志文件 ###

找到在logback.xml配置的日志文件路径，查看日志文件。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70 1][]

![20210313110842896.png][]

![20210313110850559.png][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70]: /images/20221023/f81d91949e2a48e2995f3eb1e83d49f9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4OTc0NjM4_size_16_color_FFFFFF_t_70 1]: /images/20221023/5d0646812cae4ef6847ab397c421eed0.png
[20210313110842896.png]: /images/20221023/69ff94641a5f40f0b5854642c598cde6.png
[20210313110850559.png]: /images/20221023/fb2481b0fe394fefab25fa3099044986.png