springboot(三)配置日志

github代码：https://github.com/showkawa/springBoot_2017/tree/master/spb-demo/spb-brian-query-service

SLF4J参考文档 https://www.slf4j.org/manual.html

springboot默认日志是slf4j + logback，pom里面配置spring-boot-starter-logging即可，此处我将配置日志修改为log4j2,步骤入下

1.添加pom.xml依赖

    <!-- log4j. -->
        <dependency> 
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>

2.application.properties配置加载日志的配置文件

#日志设置
logging.config=classpath:log4j2-dev.xml

3.添加日志文件 log4j2-dev.xml

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

    <!-- 文件输出格式 -->
    <property name="PATTERN" value="%-12(%d{yyyy-MM-dd HH:mm:ss.SSS}) |-%-5level [%thread] %c [%L] -| %msg%n" />
    <!-- test文件路径 -->
    <property name="TEST_FILE_PATH" value="c:/opt/roncoo/logs" />
    <!-- pro文件路径 -->
    <property name="PRO_FILE_PATH" value="/opt/roncoo/logs" />

    <!-- 开发环境 -->
    <springProfile name="dev">
        <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>${PATTERN}</pattern>
            </encoder>
        </appender>
        <!-- 输出debug信息的目录 -->
        <logger name="com.kawa" level="debug"/>

        <root level="info">
            <appender-ref ref="CONSOLE" />
        </root>
    </springProfile>

    <!-- 测试环境 -->
    <springProfile name="test">
        <!-- 每天产生一个文件 -->
        <appender name="TEST-FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <!-- 文件路径 -->
            <file>${TEST_FILE_PATH}</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <!-- 文件名称 -->
                <fileNamePattern>${TEST_FILE_PATH}/info.%d{yyyy-MM-dd}.log</fileNamePattern>
                <!-- 文件最大保存历史数量 -->
                <MaxHistory>100</MaxHistory>
            </rollingPolicy>
            
            <layout class="ch.qos.logback.classic.PatternLayout">
                <pattern>${PATTERN}</pattern>
            </layout>
        </appender>
        
        <root level="info">
            <appender-ref ref="TEST-FILE" />
        </root>
    </springProfile>

    <!-- 生产环境 -->
    <springProfile name="prod">
        <appender name="PROD_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>${PRO_FILE_PATH}</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${PRO_FILE_PATH}/warn.%d{yyyy-MM-dd}.log</fileNamePattern>
                <MaxHistory>100</MaxHistory>
            </rollingPolicy>
            <layout class="ch.qos.logback.classic.PatternLayout">
                <pattern>${PATTERN}</pattern>
            </layout>
        </appender>
        
        <root level="warn">
            <appender-ref ref="PROD_FILE" />
        </root>
    </springProfile>
</configuration>