SpringBoot日志输出

1、application.yml中设置路径和日志输出级别：

# 日志输出路径
log:
  path: /Users/sorin/Desktop/log
  level: INFO

2、resources目录下创建logback-spring.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true" scan="true" scanPeriod="30 seconds">

    <springProperty scope="context" name="logLevel" source="log.level"/>
    <springProperty scope="context" name="logPath" source="log.path"/>


    <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
    <conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
    <conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" />
    <!-- 彩色日志格式 -->
    <property name="CONSOLE_LOG_PATTERN"
              value="${CONSOLE_LOG_PATTERN:-%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}" />

    <!-- 控制台输出 -->
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${CONSOLE_LOG_PATTERN}</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <!-- 系统INFO日志文件 -->
    <appender name="INFO_FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 过滤器，只打印ERROR级别的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--日志文件输出的文件名-->
            <FileNamePattern>${logPath}/info.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <!--日志文件保留天数-->
            <!--<MaxHistory>15</MaxHistory>-->
            <!--日志文件最大的大小-->
            <MaxFileSize>10MB</MaxFileSize>
        </rollingPolicy>

        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--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.SSS}] [%thread] [%-5level] %logger{50} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <logger name="info_error" additivity="true">
        <appender-ref ref="INFO_FILE"/>
    </logger>

    <!-- 系统错误日志文件 -->
    <appender name="SYSTEM_FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 过滤器，只打印ERROR级别的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--日志文件输出的文件名-->
            <FileNamePattern>${logPath}/error.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <!--日志文件保留天数-->
            <MaxHistory>15</MaxHistory>
            <!--日志文件最大的大小-->
            <MaxFileSize>10MB</MaxFileSize>
        </rollingPolicy>

        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--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.SSS}] [%thread] [%-5level] %logger{50} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <logger name="system_error" additivity="true">
        <appender-ref ref="SYSTEM_FILE"/>
    </logger>


    <!-- 自己打印的日志文件，用于记录特殊信息 -->
    <appender name="PUSH_ERROR_FILE"  class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!-- 过滤器，只打印ERROR级别的日志 -->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--日志文件输出的文件名-->
            <FileNamePattern>${LOG_HOME}/push_error.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <!--日志文件保留天数-->
            <MaxHistory>15</MaxHistory>
            <!--日志文件最大的大小-->
            <MaxFileSize>10MB</MaxFileSize>
        </rollingPolicy>

        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--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.SSS}] [%thread] [%-5level] %logger{50} - %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>
    <logger name="push_error" additivity="true">
        <appender-ref ref="PUSH_ERROR_FILE"/>
    </logger>

    <!-- 开发环境下的日志配置 -->
    <springProfile name="dev">
        <root level="${logLevel}">
            <appender-ref ref="CONSOLE" />
            <appender-ref ref="SYSTEM_FILE" />
            <appender-ref ref="INFO_FILE" />
        </root>
    </springProfile>

    <!-- 生产环境下的日志配置 -->
    <springProfile name="pro">
        <root level="${logLevel}">
            <appender-ref ref="CONSOLE" />
            <appender-ref ref="SYSTEM_FILE" />
            <appender-ref ref="INFO_FILE" />
        </root>
    </springProfile>

    <!-- 仿真环境下的日志配置 -->
    <springProfile name="test">
        <root level="${logLevel}">
            <appender-ref ref="CONSOLE" />
            <appender-ref ref="SYSTEM_FILE" />
            <appender-ref ref="INFO_FILE" />
        </root>
    </springProfile>
</configuration>

3、创建LogUtil类，添加输出方法

public static void printPushErrorLog(String message){
        Logger logger  =  LoggerFactory.getLogger("push_error");
        StringBuffer logOut = new StringBuffer();
        logOut.append(message);
        logger.info(logOut.toString());
    }