SpringBoot应用与原理之集成Log4j2

一 本章概述

SpringBoot应用替换默认的Logback日之框架，采用Log4j2实现

二 SpringBoot应用集成Log4j2

1 替换默认的logback

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

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2 加入基于SpringBoot的Log4j2 Starter

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

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3 配置log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--设置log4j2的自身log级别为warn -->
<configuration status="warn">
    <properties>

        <Property name="app_name">springboot-web</Property>
        <Property name="log_path">logs/${app_name}</Property>

    </properties>
    <appenders>
        <console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="[%d][%t][%p][%l] %m%n" />
        </console>

        <RollingFile name="RollingFileInfo" fileName="${log_path}/info.log"
                     filePattern="${log_path}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log.gz">
            <Filters>
                <ThresholdFilter level="INFO" />
                <ThresholdFilter level="WARN" onMatch="DENY"
                                 onMismatch="NEUTRAL" />
            </Filters>
            <PatternLayout pattern="[%d][%t][%p][%c:%L] %m%n" />
            <Policies>
                <!-- 归档每天的文件 -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true" />
                <!-- 限制单个文件大小 -->
                <SizeBasedTriggeringPolicy size="2 MB" />
            </Policies>
            <!-- 限制每天文件个数 -->
            <DefaultRolloverStrategy compressionLevel="0" max="10"/>
        </RollingFile>

        <RollingFile name="RollingFileWarn" fileName="${log_path}/warn.log"
                     filePattern="${log_path}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log.gz">
            <Filters>
                <ThresholdFilter level="WARN" />
                <ThresholdFilter level="ERROR" onMatch="DENY"
                                 onMismatch="NEUTRAL" />
            </Filters>
            <PatternLayout pattern="[%d][%t][%p][%c:%L] %m%n" />
            <Policies>
                <!-- 归档每天的文件 -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true" />
                <!-- 限制单个文件大小 -->
                <SizeBasedTriggeringPolicy size="2 MB" />
            </Policies>
            <!-- 限制每天文件个数 -->
            <DefaultRolloverStrategy compressionLevel="0" max="10"/>
        </RollingFile>

        <RollingFile name="RollingFileError" fileName="${log_path}/error.log"
                     filePattern="${log_path}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log.gz">
            <ThresholdFilter level="ERROR" />
            <PatternLayout pattern="[%d][%t][%p][%c:%L] %m%n" />
            <Policies>
                <!-- 归档每天的文件 -->
                <TimeBasedTriggeringPolicy interval="1" modulate="true" />
                <!-- 限制单个文件大小 -->
                <SizeBasedTriggeringPolicy size="2 MB" />
            </Policies>
            <!-- 限制每天文件个数 -->
            <DefaultRolloverStrategy compressionLevel="0" max="10"/>
        </RollingFile>

        <!-- 配置mongdb appender -->
    </appenders>

    <loggers>
        <!--过滤掉spring和hibernate的一些无用的debug信息 -->

        <root level="info">
            <appender-ref ref="Console" />
            <appender-ref ref="RollingFileInfo" />
            <appender-ref ref="RollingFileWarn" />
            <appender-ref ref="RollingFileError" />
            <!-- 输出日志到mongodb -->
        </root>

    </loggers>

</configuration>

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4 配置appliaction.properties

logging.config=classpath:log4j2.xml

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三 Log4j2的应用

package com.ekeyfund.framework.springboot.web.controller;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * IndexController
 *
 * @author tony [e-mail]
 * @create 2017-09-14-下午4:51
 * @see
 * @since JDK1.8u141
 */
@RestController
public class IndexController {


    private static final Logger logger = LogManager.getLogger(IndexController.class);

    @GetMapping("/index")
    public String index(){

        for(int i=0;i<10_0000;i++){
            logger.info("info execute index method");
            logger.warn("warn execute index method");
            logger.error("error execute index method");

        }


        return "My First SpringBoot Application";
    }
}

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