使用 java.util.logging.Logger 时如何在文本文件中写入日志 [英] How to write logs in text file when using java.util.logging.Logger

问题描述

我有一种情况，我想将我创建的所有日志写入一个文本文件.

I have a situation in which I want to write all logs created by me into a text file.

我们使用 java.util.logging.Logger API 来生成日志.

We are using java.util.logging.Logger API to generate the logs.

我试过了:

private static Logger logger = Logger.getLogger(className.class.getName());
FileHandler fh;   
fh = new FileHandler("C:/className.log");   
logger.addHandler(fh); 

但仍然只在控制台上获取我的日志....

But still getting my logs on console only....

推荐答案

试试这个示例.它对我有用.

Try this sample. It works for me.

public static void main(String[] args) {  

    Logger logger = Logger.getLogger("MyLog");  
    FileHandler fh;  

    try {  

        // This block configure the logger with handler and formatter  
        fh = new FileHandler("C:/temp/test/MyLogFile.log");  
        logger.addHandler(fh);
        SimpleFormatter formatter = new SimpleFormatter();  
        fh.setFormatter(formatter);  

        // the following statement is used to log any messages  
        logger.info("My first log");  

    } catch (SecurityException e) {  
        e.printStackTrace();  
    } catch (IOException e) {  
        e.printStackTrace();  
    }  

    logger.info("Hi How r u?");  

}

在 MyLogFile.log 中生成输出

Produces the output at MyLogFile.log

Apr 2, 2013 9:57:08 AM testing.MyLogger main  
INFO: My first log  
Apr 2, 2013 9:57:08 AM testing.MyLogger main  
INFO: Hi How r u?

要删除控制台处理程序，请使用

To remove the console handler, use

logger.setUseParentHandlers(false);

因为 ConsoleHandler 已注册到所有记录器派生自的父记录器.

since the ConsoleHandler is registered with the parent logger from which all the loggers derive.

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