springboot系列五 logback 日志配置 颜色渲染控制台日志

最简单的日志配置

在application.yml中添加debug模式日志：

debug: true

启动项目后发现会打印不少日志。springboot默认是debug=false

默认日志配置是在org.springframework.boot.context.logging.LoggingApplicationListener类中的。

static {
        MultiValueMap<String, String> loggers = new LinkedMultiValueMap();
        loggers.add("web", "org.springframework.core.codec");
        loggers.add("web", "org.springframework.http");
        loggers.add("web", "org.springframework.web");
        loggers.add("sql", "org.springframework.jdbc.core");
        loggers.add("sql", "org.hibernate.SQL");
        DEFAULT_GROUP_LOGGERS = Collections.unmodifiableMap(loggers);
        loggers = new LinkedMultiValueMap();
        loggers.add(LogLevel.DEBUG, "sql");
        loggers.add(LogLevel.DEBUG, "web");
        loggers.add(LogLevel.DEBUG, "org.springframework.boot");
        loggers.add(LogLevel.TRACE, "org.springframework");
        loggers.add(LogLevel.TRACE, "org.apache.tomcat");
        loggers.add(LogLevel.TRACE, "org.apache.catalina");
        loggers.add(LogLevel.TRACE, "org.eclipse.jetty");
        loggers.add(LogLevel.TRACE, "org.hibernate.tool.hbm2ddl");
        LOG_LEVEL_LOGGERS = Collections.unmodifiableMap(loggers);
        EVENT_TYPES = new Class[]{ApplicationStartingEvent.class, ApplicationEnvironmentPreparedEvent.class, ApplicationPreparedEvent.class, ContextClosedEvent.class, ApplicationFailedEvent.class};
        SOURCE_TYPES = new Class[]{SpringApplication.class, ApplicationContext.class};
        shutdownHookRegistered = new AtomicBoolean(false);
    }

使用logback配置日志

在src/main/resources下新建文件 /logs/logback.xml，内容(控制台带颜色渲染)：

<?xml version="1.0" encoding="UTF-8"?>

<configuration scan="true" scanPeriod="60 seconds" debug="false">

    <contextName>logback</contextName>
    <!--日志文件的存储地址-->
    <property name="log.path" value="${user.home}/logs/springboot/log" />

    <!--输出到控制台 名字随便写-->
    <appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>INFO</level>
        </filter>
        <withJansi>true</withJansi>
        <encoder>
            <!--<pattern>%d %p (%file:%line\)- %m%n</pattern>-->
            <!--格式化输出：%d: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-->
            <pattern>--------------> %red(%d{yyyy-MM-dd HH:mm:ss}) %green([%thread]) %highlight(%-5level) %boldMagenta(%logger) - %cyan(%msg%n)</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <!--输出到文件-->
    <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${log.path}/main.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--按没分钟保存日志 修改格式能够按小时、按天、月来保存-->
            <fileNamePattern>${log.path}/main.log%d{yyyy-MM-dd HH:mm}.log</fileNamePattern>
            <maxHistory>30</maxHistory>
            <totalSizeCap>1GB</totalSizeCap>
        </rollingPolicy>
        <encoder>
            <!--格式化输出：%d: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-->
            <pattern>--------------> %d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <root level="info">
        <appender-ref ref="stdout" />
        <appender-ref ref="file" />
    </root>

</configuration>

application.yml中添加日志配置：

logging:
  config: classpath:log/logback.xml

写一个测试接口：

@SpringBootApplication
@RestController
@Slf4j
public class LogApp {
    public static void main(String[] args) {
        SpringApplication.run(LogApp.class, args);
    }

    @GetMapping("/")
    public String home(){
        log.info("访问了主页接口");
        return "hello world!";
    }
}

启动项目后，访问 localhost:8080 ,查看控制台和文件

源码地址

https://gitee.com/yimingkeji/springboot/tree/master/log