log4j动态创建日志文件

比如现在系统会给多个公司发送数据,现希望给每个公司的数据有单独的日志文件记录。由于公司名字是动态的没法在log4j配置文件中写死,这时就只能通过动态创建了。

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/**
* Created by Administrator on 2017/12/10.
*/
public final class Log4jUtil {
private final static ConcurrentHashMap<String,Logger> loggerMap = new ConcurrentHashMap<String, Logger>();
public static Logger getLogger(String name) {
Logger logger = loggerMap.get(name);
if (null != logger) {
return logger;
}
return createNewLogger(name);
}
private static Logger createNewLogger(String name) {
Logger logger = Logger.getLogger(name);
logger.removeAllAppenders();
logger.setLevel(Level.DEBUG);
logger.setAdditivity(false);
RollingFileAppender appender = new RollingFileAppender();
PatternLayout layout = new PatternLayout();
String conversionPatten = "[%d] %p %t %c - %m%n";
layout.setConversionPattern(conversionPatten);
appender.setLayout(layout);
String basePath = "/usr/logs/rb/";
appender.setFile(basePath + name + ".log");
appender.setEncoding("utf-8");
appender.setMaxBackupIndex(10);
appender.setMaxFileSize("50MB");
appender.setAppend(true);
appender.activateOptions();
logger.addAppender(appender);
loggerMap.put(name,logger);
return logger;
}
}

测试代码:

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/**
* 动态生成日志文件名。
* Created by Administrator on 2017/12/10.
*/
public class DynamicLogFileName {
public static void main(String[] args) {
LogTestThread ltt1 = new LogTestThread("test1");
LogTestThread ltt2 = new LogTestThread("test2");
ltt1.start();
ltt2.start();
}
}
class LogTestThread extends Thread {
private String name;
public LogTestThread(String name) {
this.name = name;
}
public void run() {
Logger logger = Log4jUtil.getLogger(this.name);
for (int i=0;i<10;i++) {
try {
Thread.sleep((long) (Math.random()*1500L+1000L));
} catch (InterruptedException e) {
e.printStackTrace();
}
logger.info(this.getName() + " msg." + i);
}
}
}

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