在java mvc框架開發(fā)過程中，我們經(jīng)常的將代碼分為類似controller（控制層）、service（業(yè)務(wù)層）、rpc（遠程接口調(diào)用層）、dao（數(shù)據(jù)層）等層級，如果將所有層級的日志全部都打到一個文件，一個是導(dǎo)致單個日志文件過大，另外不方便查看，所以下面考慮用log4j2根據(jù)不同層級生成對應(yīng)的log文件：

1. maven配置

<dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId></dependency><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-1.2-api</artifactId><version>2.10.0</version></dependency>

2. log4j2配置文件

<?xml version="1.0" encoding="UTF-8"?> <Configuration status="WARN" monitorInterval="30"><Properties><!-- 文件輸出格式 --><Property name="pattern">%d{yyyy-MM-dd HH:mm:ss.SSS} |-%-5level [LOGID:%X{logId}] [%thread] %C#%M [%L] -| %msg%n</Property><Property name="filePath">/export/Logs/Domains/myapp</Property></Properties><Appenders><Console name="console" target="system_out"><PatternLayout pattern="${pattern}" /></Console><RollingRandomAccessFile name="rpcFile" fileName="${filePath}/rpc.log" filePattern="${filePath}/rpc-%d{yyyy-MM-dd}.log"><PatternLayout pattern="${pattern}"/><Policies><TimeBasedTriggeringPolicy modulate="true" interval="1"/></Policies></RollingRandomAccessFile><RollingRandomAccessFile name="serviceFile" fileName="${filePath}/service.log" filePattern="${filePath}/service-%d{yyyy-MM-dd}.log"><PatternLayout pattern="${pattern}"/><Policies><TimeBasedTriggeringPolicy modulate="true" interval="1"/></Policies></RollingRandomAccessFile><RollingRandomAccessFile name="controllerFile" fileName="${filePath}/controller.log" filePattern="${filePath}/controller-%d{yyyy-MM-dd}.log"><PatternLayout pattern="${pattern}"/><Policies><TimeBasedTriggeringPolicy modulate="true" interval="1"/></Policies></RollingRandomAccessFile></Appenders><Loggers><!--過濾信息--><logger name="org.springframework" level="WARN"></logger><logger name="RPC" level="INFO" ><AppenderRef ref="rpcFile" /></logger><logger name="SERVICE" level="INFO" ><AppenderRef ref="serviceFile" /></logger><logger name="CONTROLLER" level="INFO" ><AppenderRef ref="controllerFile" /></logger><Root level="INFO"><AppenderRef ref="console" /><AppenderRef ref="exceptionFile" /></Root></Loggers></Configuration>

3. 輸出日志工具類

import org.slf4j.Logger; import org.slf4j.LoggerFactory;public class LogUtil {/*** RPC層日志記錄*/public static final Logger RPC = LoggerFactory.getLogger("RPC");/*** Service業(yè)務(wù)層日志記錄*/public static final Logger SERVICE = LoggerFactory.getLogger("SERVICE");/*** Controller業(yè)務(wù)層日志記錄*/public static final Logger CONTROLLER = LoggerFactory.getLogger("CONTROLLER");}

4. 輸出日志

LogUtil.CONTROLLER.error("error message={}", e); LogUtil.SERVICE.warn("warn message={}", msg); ....

轉(zhuǎn)載于:https://www.cnblogs.com/aixw/p/10188957.html

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