SpringBoot使用自定义的日志框架,日志的存储方式为json日志格式

首先SpringBoot实现了它自己的日志框架即默认日志Logback,可以直接在SpringBoot配置文件配置 比如logging.path=xx,logging.level.root=xx等等,启动项目会自动生成对应的日志文件并记录,但是不能实现json格式的日志存储,所以为了满足需要,我们可以选择自定义的的日志并配置,

SpringBoot自1.4以上的版本开始,不支持log4日志转而开始使用log4j2日志,要使用自定义的日志框架的话,必须把SpringBoot默认使用的日志排除,提示log4j2支持json日志格式

 log4j 2.x版本不再支持像1.x中的.properties后缀的文件配置方式,2.x版本配置文件后缀名只能为”.xml”,”.json”或者”.jsn”.

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
   <exclusions>
      <exclusion>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-logging</artifactId>
      </exclusion>
   </exclusions>
</dependency>

在引入log4j2 依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-log4j2</artifactId>
   <version>1.5.8.RELEASE</version>
</dependency>


      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <java.version>1.8</java.version>
      <log4j2.level>debug</log4j2.level>
      <log4j2.root.path>/data/springcloud/logs/xx/config/config</log4j2.root.path>
      <log4j2.error.path>/data/springcloud/logs/xx/config/config</log4j2.error.path>

    <!-- 使用jsonLayout必须依赖jackson -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>

    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>

    </dependency>
 <sourceDirectory>src/main/java</sourceDirectory>
    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <filtering>true</filtering>
        <includes>
          <include>**/*</include>
        </includes>
      </resource>
    </resources>

添加必须的插件

 <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <configuration>
            <encoding>utf-8</encoding>
            <useDefaultDelimiters>true</useDefaultDelimiters>
          </configuration>
        </plugin>

  <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
  </plugin>

SpringBoot配置文件指定log4j.xml

logging.config=classpath:log4j2.xml

log4j2.xml的配置:
log4j2有很多的布局方式,其中 JosnLayout 表示记录方式是json方式

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

    <!--全局参数-->
    <Properties>
        <Property name="pattern">%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%l - %m%n</Property>
    </Properties>


    <Loggers>
        <Root level="DEBUG">
            <AppenderRef ref="console"></AppenderRef>
            <AppenderRef ref="rolling_file"></AppenderRef>
        </Root>
        <!--只将com.kk.springboot.demo写到文件-->
       <!-- <Logger name="com.yiche.controller.Test" level="${log4j2.level}">
            <AppenderRef ref="file"></AppenderRef>
        </Logger>-->
    </Loggers>

    <Appenders>
        <Console name="console" target="SYSTEM_OUT" follow="true">
            <!--控制台只输出level及以上级别的信息-->
            <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY"/>


             <!--<JsonLayout locationInfo="true" pattern="{pattern}">
                 <KeyValuePair key="timeMillis" value="$${date:yyyy-MM-dd'T'HH:mm:ss,SSS}" />
             </JsonLayout>-->
<!--
            <JsonLayout complete="false" compact="true">
                <KeyValuePair key="timestame" value="$${date:yyyy-MM-dd'T'HH:mm:ss.SSSZ}" />
            </JsonLayout>-->

            <!--<PatternLayout>


                <Pattern>${pattern}</Pattern>


            </PatternLayout>-->



        </Console>
        <!-- 这个会打印出所有的信息,每次大小超过size,则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩,作为存档-->
        <RollingFile name="rolling_file"
                     fileName="${log4j2.root.path}.log"
                     filePattern="${log4j2.root.path}_%d{yyyy-MM-dd}.log">
            <JsonLayout/>
            <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>

           <!-- <PatternLayout>
                <Pattern>${pattern}</Pattern>
            </PatternLayout>-->
<!--

            <PatternLayout pattern="%d{yyyy.MM.dd 'at' HH:mm:ss z} %-5level %class{36} %M() @%L - %msg%n"/>

-->

            <Policies>
                <TimeBasedTriggeringPolicy/>
                <SizeBasedTriggeringPolicy size="100 MB"/>
            </Policies>


        </RollingFile>

        <File name="file" fileName="${log4j2.package.path}.log">
            <!--&lt;!&ndash;控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch)&ndash;&gt;-->
            <ThresholdFilter level="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/>
           <!-- <PatternLayout>
                <Pattern>${pattern}</Pattern>
            </PatternLayout>-->
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
        </File>

    </Appenders>

</configuration>

参考:
https://www.cnblogs.com/baizhanshi/p/7503417.html

https://blog.csdn.net/rogger_chen/article/details/50587920

https://blog.csdn.net/zhou_kapenter/article/details/64123933

https://blog.csdn.net/yangzhuangqiu/article/details/49636661

http://book.51cto.com/art/201512/499576.htm

https://blog.csdn.net/wendingzhulu/article/details/52423522

SpringBoot自定义log4j2 日志
https://www.cnblogs.com/advancing/p/7922463.html

log4j2日志的布局和API
http://logging.apache.org/log4j/log4j-2.2/manual/layouts.html
http://logging.apache.org/log4j/2.x/manual/layouts.html#JSONLayout

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