[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
{
    @Override
    public 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Formatter
        consoleHandler.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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        java logger打印错误行号
        https://blog.51cto.com/u_16213398/7623080
        myLogger.info("11");*/
    }

}

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");
    }
}