How to set up java logging using a properties file? (java.util.logging)

Solution 1:

you can set your logging configuration file through command line:

$ java -Djava.util.logging.config.file=/path/to/app.properties MainClass

this way seems cleaner and easier to maintain.

Solution 2:

Okay, first intuition is here:

handlers = java.util.logging.FileHandler, java.util.logging.ConsoleHandler
.level = ALL

The Java prop file parser isn't all that smart, I'm not sure it'll handle this. But I'll go look at the docs again....

In the mean time, try:

handlers = java.util.logging.FileHandler
java.util.logging.ConsoleHandler.level = ALL

Update

No, duh, needed more coffee. Nevermind.

While I think more, note that you can use the methods in Properties to load and print a prop-file: it might be worth writing a minimal program to see what java thinks it reads in that file.

Another update

This line:

    FileInputStream configFile = new FileInputStream("/path/to/app.properties"));

has an extra end-paren. It won't compile. Make sure you're working with the class file you think you are.

Solution 3:

I have tried your code in above code don't use [preferences.load(configFile);] statement and it will work. Here is a running sample code

public static void main(String[] s) {
    
    Logger log = Logger.getLogger("MyClass");
    try {
        FileInputStream fis =  new FileInputStream("p.properties");
        LogManager.getLogManager().readConfiguration(fis);
        
        log.setLevel(Level.FINE);
        log.addHandler(new java.util.logging.ConsoleHandler());
        log.setUseParentHandlers(false);
    
        log.info("starting myApp");
        fis.close();
    
    } catch(IOException e) {
        e.printStackTrace();
    }
}

Solution 4:

Logger log = Logger.getLogger("myApp");
log.setLevel(Level.ALL);
log.info("initializing - trying to load configuration file ...");

//Properties preferences = new Properties();
try {
    //FileInputStream configFile = new //FileInputStream("/path/to/app.properties");
    //preferences.load(configFile);
    InputStream configFile = myApp.class.getResourceAsStream("app.properties");
    LogManager.getLogManager().readConfiguration(configFile);
} catch (IOException ex)
{
    System.out.println("WARNING: Could not open configuration file");
    System.out.println("WARNING: Logging not configured (console output only)");
}
log.info("starting myApp");

this is working..:) you have to pass InputStream in readConfiguration().

Solution 5:

Are you searching for the log file in the right path: %h/one%u.log

Here %h resolves to your home : In windows this defaults to : C:\Documents and Settings(user_name).

I have tried the sample code you have posted and it works fine after you specify the configuration file path (logging.properties either through code or java args) .