使用Log4j日志处理

傷城~ 2022-05-27 03:48 184阅读 0赞

Springboot日志默认使用的是logback，本文将介绍将springboot项目日志修改为log4j。

首先要将默认的日志依赖排除，然后引用log4j，pom文件代码如下：

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.dalaoyang</groupId>
        <artifactId>springboot_log4j</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>springboot_log4j</name>
        <description>springboot_log4j</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.9.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
                <exclusions>
                    <exclusion>
                        <groupId>org.springframework.boot</groupI>
                        <artifactId>spring-boot-starter-logging</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-log4j</artifactId>
                <version>1.3.2.RELEASE</version>
                <type>pom</type>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

引用log4j之后，在resources加入log4j配置即可，下面是本人之前项目的log4j.properties内容，代码如下：

log4j.rootLogger=debug,CONSOLE,FILE
    
    ##输出到控制台
    log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
    log4j.appender.CONSOLE.Threshold=DEBUG
    log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} -%-4r [%t] %-5p  %x - %m%n
    log4j.appender.CONSOLE.Target=System.out
    log4j.appender.CONSOLE.Encoding=gbk
    log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
    
    
    ##输出到日志文件 每10M分成一个日志文件
    log4j.appender.FILE=org.apache.log4j.DailyRollingFileAppender
    log4j.appender.FILE.File=/Users/dalaoyang/Downloads/log
    log4j.appender.FILE.DatePattern = '_'yyyy-MM-dd-HH-mm'.log'
    log4j.appender.FILE.MaxFileSize=10MB
    log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
    log4j.appender.FILE.layout.ConversionPattern=%d%n%m%n

简单讲解一下：  
CONSOLE里面是输出到控制台的日志  
FILE是输入到日志文件的日志，日志是按照大小分的，最大为10M，  
每小时一个日志文件。