java - 记录器创建太多文件

Question

我正在编写独立的java工具。下面是我的记录器实现代码。我在下面的代码中遇到一个问题。每当我调用 ZRToolLogger.getLogger 时，就会创建一个新文件。我需要在单个文件中维护日志信息。如何解决这个问题？

我不知道下面的实现是正确还是错误。如果错误，请告诉我另一种解决方法。

import java.io.IOException;
import java.util.logging.FileHandler;
import java.util.logging.Formatter;
import java.util.logging.LogManager;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

public class ZRToolLogger{
    public static Logger getInfoLogger(String loggerName)
    {
        LogManager logManager = LogManager.getLogManager();
        Logger logger = Logger.getLogger(loggerName);
        logger.setUseParentHandlers(false);
        FileHandler fh = null;
        try{
            fh = new FileHandler(ZRToolConstants.CTX_PATH+"/logs/log.%u.txt", true);
        }
        catch(IOException e)
        {
        }

        logManager.addLogger(logger);
        ZRToolLogFormatter formatterTxt = new ZRToolLogFormatter();

        if(fh != null)
        {
            fh.setFormatter(formatterTxt);
        }
        logger.addHandler(fh);

        return logger;
    }

    private static class ZRToolLogFormatter extends Formatter
    {
        public ZRToolLogFormatter()
        {
            super();
        }

        @Override
        public String format(LogRecord log)
        {
            return log.getLevel() + ":" + formatMessage(log)+"\n";
        }
    }
}

谢谢。

Answer 1

你必须使 fh 静态。

public class ZRToolLogger{

public static FileHandler fh;
public static Logger getInfoLogger(String loggerName)
{
    LogManager logManager = LogManager.getLogManager();
    Logger logger = Logger.getLogger(loggerName);
    logger.setUseParentHandlers(false);

    if (ZRToolLogger.fh = null)
    {
        try{
            ZRToolLogger.fh = new FileHandler(ZRToolConstants.CTX_PATH+"/logs/log.%u.txt", true);
        }
        catch(IOException e)
        {
        }
    }
    logManager.addLogger(logger);
    ZRToolLogFormatter formatterTxt = new ZRToolLogFormatter();

    if(ZRToolLogger.fh != null)
    {
        ZRToolLogger.fh.setFormatter(formatterTxt);
    }
    logger.addHandler(fh);

    return logger;
}

private static class ZRToolLogFormatter extends Formatter
{
    public ZRToolLogFormatter()
    {
        super();
    }

    @Override
    public String format(LogRecord log)
    {
        return log.getLevel() + ":" + formatMessage(log)+"\n";
    }
}

}