每天都有Java.util.logger新文件 [英] Java.util.logger new file every day

问题描述

我正在使用java.util.logging框架在我的JSF应用程序中实现日志记录.我已经成功实现了这一点，但是我有一个新的要求，即每天轮换日志并创建一个新的日志文件.

I am using java.util.logging framework to implement logging in my JSF application. I have successfully done implementing this, but however I have a new requirement to rotate the logs and create a new log file for each day.

我无法弄清楚如何实现.任何有关实施的提示将不胜感激.谢谢.

I am not able to figure out how this can be implemented. Any hints on implementation would be highly appreciated. Thanks.

这是我配置记录器的方式:

This is how I have configured my logger:

        myLogger = Logger.getLogger("info.aio");
        fileHandler = new FileHandler("aioinfo.log", 1048576, 100, true);
        fileHandler.setFormatter(new SimpleFormatter());
        myLogger.addHandler(fileHandler);

推荐答案

由于您正在使用代码来设置FileHandler，因此您可以

Since you are using code to setup your FileHandler then you can add code to close and recreate the FileHandler using the '%g'.

public static void main(String[] args) throws Exception {
    //create aioinfo0.log.
    install();
    //rename aioinfo0.log to aioinfo1.log and create aioinfo0.log.
    install();
}

private static final Logger myLogger = Logger.getLogger("info.aio");
private static volatile FileHandler fileHandler;

private static void install() throws IOException {
    FileHandler fh = fileHandler;
    if (fh != null) {
        myLogger.removeHandler(fh);
        fh.close(); //Release any file lock.
    }

    fileHandler = rotate("aioinfo%g.log", 1048576, 100, true);
    fileHandler.setFormatter(new SimpleFormatter());
    myLogger.addHandler(fileHandler);
}

private static FileHandler rotate(String pattern, int limit, int count, boolean append) throws IOException {
    if (pattern == null) {
        LogManager m = LogManager.getLogManager();
        String p = FileHandler.class.getName();
        pattern = m.getProperty(p + ".pattern");
        if (pattern == null) {
            pattern = "%h/java%u.log";
        }
    }

    new FileHandler(pattern, 0, count, false).close(); //Trigger rotate.
    return new FileHandler(pattern, limit, count, append);
}

如果您希望它自动运行，则只需创建一个

If you want it to work automatically you can simply create a proxy handler for the FileHandler to handle closing and recreating files each day.

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