Maven/Gradle 在Spring Boot中配置log4j

需求：将info和error信息用日志输出，方便日后查看排错。

一、Maven项目

1、引入log4j的依赖（pom.xml)

<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>

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

2、添加log4j.properties配置文件（resources/log4j.properties）

#log4j.rootLogger=CONSOLE,info,error,DEBUG
#调试log4j的错误时打开
log4j.rootLogger=info,error,CONSOLE,DEBUG
#上线时打开，不需再打印错误
#log4j.rootLogger=error

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n

log4j.logger.info=info
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout
log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.info.datePattern='.'yyyy-MM-dd
log4j.appender.info.Threshold = info
log4j.appender.info.append=true
#log4j.appender.info.File=/usr/local/api/logs/info/info.log
#log4j.appender.info.File=/Users/yelongyang/Downloads/logs/info/info.log

log4j.logger.error=error
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.error.datePattern='.'yyyy-MM-dd
log4j.appender.error.Threshold = error
log4j.appender.error.append=true
#log4j.appender.error.File=/usr/local/api/logs/error/error.log
#log4j.appender.error.File=/Users/yelongyang/Downloads/logs/error/error.log

log4j.logger.DEBUG=DEBUG
log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout
log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n
log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd
log4j.appender.DEBUG.Threshold = DEBUG
log4j.appender.DEBUG.append=true
#log4j.appender.DEBUG.File=/usr/local/api/logs/debug/debug.log
#log4j.appender.DEBUG.File=/Users/yelongyang/Downloads/logs/debug/debug.log

### Debug
log4j.logger.com.mybatis=DEBUG
log4j.logger.com.mybatis.common.jdbc.SimpleDataSource=DEBUG
log4j.logger.com.mybatis.common.jdbc.ScriptRunner=DEBUG
log4j.logger.com.mybatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG

##本地环境
log4j.appender.info.File=E:/Mzj/logs/info/info.log
log4j.appender.error.File=E:/Mzj/logs/error/error.log
log4j.appender.DEBUG.File=E:/Mzj/logs/debug/debug.log

#生产环境
#log4j.appender.info.File=/usr/local/spring-boot-api/logs/info/info.log
#log4j.appender.error.File=/usr/local/spring-boot-api/logs/error/error.log
#log4j.appender.DEBUG.File=/usr/local/spring-boot-api/logs/debug/debug.log

二、Gradle项目

1、引入log4j的依赖（build.gradle)

一开始百度用的这个

configurations {
    compile.exclude group:'ch.qos.logback'
}

dependencies {
    
    compile ("org.springframework.boot:spring-boot-starter-web") {
        exclude module: 'org.springframework.boot:spring-boot-starter-logging'
    }
     compile ('org.springframework.boot:spring-boot-starter-log4j')
     
}

结果报错：Error:Cause: org.gradle.internal.component.external.model.DefaultModuleComponentSelector

百思不得其解，再后来输入gradlew build指令得到以下错误信息



后来看到网上说