[JAVA]MyLogger

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.*;/*** 可以自已定义日志打印格式，这样看起来比较方便些**/
class MyFormatter extends Formatter
{@Overridepublic String format(LogRecord arg0){//创建StringBuilder对象来存放后续需要打印的日志内容StringBuilder builder = new StringBuilder();//获取时间SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS");Date now = new Date();String dateStr = simpleDateFormat.format(now);builder.append("[");builder.append(dateStr);builder.append(" ");//拼接日志级别builder.append(arg0.getLevel()).append(" ");builder.append(arg0.getSourceClassName()).append(" ");//拼接方法名//builder.append(arg0.getSourceMethodName()).append(" ");StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();String line = stackTrace[8].toString();for (int i = 0; i < stackTrace.length; i++) {//System.out.println(stackTrace[i]);}//String lineNumber = line.substring(line.indexOf(":") + 1, line.length() - 1);String lineNumber = line.substring(line.indexOf(":") + 1, line.length() - 1);//拼接方法名builder.append(line).append("] ");//拼接日志内容builder.append(arg0.getMessage());//日志换行builder.append("\r\n");return builder.toString();}
}public class MyLogger {static Logger logger;static  {logger = Logger.getLogger(MyLogger.class.getName());logger.setUseParentHandlers(false);//如果需要将日志文件写到文件系统中，需要创建一个FileHandler对象Handler consoleHandler = new ConsoleHandler();//创建日志格式文件：本次采用自定义的FormatterconsoleHandler.setFormatter(new MyFormatter());//将FileHandler对象添加到Logger对象中logger.addHandler(consoleHandler);}public static Logger getLogger() {return logger;}public static void main(String[] args) throws SecurityException, IOException {Logger logger = Logger.getLogger(MyLogger.class.toString());logger.info("123");StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();System.out.println(stackTrace.length);for (StackTraceElement s: stackTrace) {System.out.println(s.toString());}/*Logger myLogger = MyLogger.getLogger();myLogger.info("1123");-----------------------------------
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import java.util.logging.Logger;public class CLASS_A {Logger logger = MyLogger.getLogger();void run(){logger.info("run");}public static void main(String[] args) {CLASS_A a = new CLASS_A();a.run();a.logger.info("11");}
}