SpringBoot使用Log4j收集日誌信息

Pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.7.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.yellow.etc</groupId>
	<artifactId>SpringBoot-logs</artifactId>
	<version>1.0.0-SNAPSHOT</version>
	<name>SpringBoot-logs</name>
	<description>SpringBoot日誌收集</description>

	<properties>
		<java.version>1.8</java.version>
		<!-- 防止pom.xml第一行報錯 -->
		<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
			<exclusions>
				<!-- 排除自帶的logback依賴 -->
				<exclusion>
					<groupId>org.springframework.boot</groupId>
					<artifactId>spring-boot-starter-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<!-- 日誌 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-log4j</artifactId>
			<version>1.3.8.RELEASE</version>
		</dependency>
	</dependencies>
	
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

Log4j.properties

log4j.rootLogger = info,stdout,error
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%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 = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
log4j.appender.info.Threshold = INFO
log4j.appender.info.append = true
log4j.appender.info.File = D:/app/info.log
log4j.appender.info.DatePattern = yyyy-MM-dd'.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 = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
log4j.appender.error.Threshold = ERROR
log4j.appender.error.append = true
log4j.appender.error.File = D:/app/error.log
log4j.appender.error.DatePattern = yyyy-MM-dd'.log'
log4j.appender.file.layout = org.apache.log4j.PatternLayout

測試

啓動項目，簡單的寫一個 controller 方法，打印 info、error 兩種級別的日誌信息。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {
	private static Logger logger = LoggerFactory.getLogger(HelloController.class);
	
	@GetMapping("log")
	public String log(String name) {
		logger.info("你好,{}", name);
		logger.error("你不好,{}", name);
		return "ok";
	}
}

查看本地日誌記錄