java.util.logging.LogManager#readConfiguration ( )源码实例Demo

public LoggingConfig() {
    try {
        // Load a properties file from class path java.util.logging.config.file
        final LogManager logManager = LogManager.getLogManager();
        URL configURL = getClass().getResource("/logging.properties");
        if (configURL != null) {
            try (InputStream is = configURL.openStream()) {
                logManager.readConfiguration(is);
            }
        } else {
            // Programmatic configuration
            System.setProperty("java.util.logging.SimpleFormatter.format",
                               "%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS.%1$tL %4$-7s [%3$s] %5$s %6$s%n");

            final ConsoleHandler consoleHandler = new ConsoleHandler();
            consoleHandler.setLevel(Level.FINEST);
            consoleHandler.setFormatter(new SimpleFormatter());

            final Logger app = Logger.getLogger("app");
            app.setLevel(Level.FINEST);
            app.addHandler(consoleHandler);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

/**
 * Configures the logging properties according to the logging.properties file found in the jar
 * resources
 */
public MZmineLoggingConfiguration() {

  try {
    ClassLoader cl = MZmineLoggingConfiguration.class.getClassLoader();
    InputStream loggingProperties = cl.getResourceAsStream("logging.properties");
    LogManager logMan = LogManager.getLogManager();
    logMan.readConfiguration(loggingProperties);
    loggingProperties.close();
  } catch (Exception e) {
    e.printStackTrace();
  }

}
 

/**
 * Configures the logging properties according to the logging.properties file found in the jar
 * resources
 */
public static void configureLogging() {

  try {
    ClassLoader cl = MZmineCore.class.getClassLoader();
    InputStream loggingProperties = cl.getResourceAsStream("logging.properties");
    LogManager logMan = LogManager.getLogManager();
    logMan.readConfiguration(loggingProperties);
    loggingProperties.close();
  } catch (Exception e) {
    e.printStackTrace();
  }

}
 

/**
 * Reloads logging to pick up changes to the java.util.logging.config.file system property.
 */
private static void reloadLoggingProperties(LogManager logManager) {
  if (System.getProperty(JAVA_UTIL_LOGGING_CONFIG_PROPERTY) == null) {
    return;
  }
  try {
    logManager.readConfiguration();
  } catch (SecurityException | IOException e) {
    System.err.println("Warning: caught exception when reading logging properties.");
    System.err.println(e.getClass().getName() + ": " + e.getMessage());
  }
}
 

/**
 * This method provides a single-call method to configure the {@link Logger}
 * instances. A default configuration is considered, enriched with a custom
 * property file for more convenient logging. The custom file is considered
 * after the default configuration, so it can override it if necessary. The
 * custom file might be provided as an argument of this method, otherwise we
 * look for a file named "jMetal.log.ini". If no custom file is provided,
 * then only the default configuration is considered.
 * 
 * @param propertyFile
 *            the property file to use for custom configuration,
 *            <code>null</code> to use only the default configuration
 * @throws IOException
 */
public static void configureLoggers(File propertyFile) throws IOException {
	// Prepare default configuration
	ByteArrayOutputStream stream = new ByteArrayOutputStream();
	PrintStream printer = new PrintStream(stream);
	printer.println(".level = INFO");
	printer.println("handlers = java.util.logging.FileHandler, java.util.logging.ConsoleHandler");
	printer.println("formatters = java.util.logging.SimpleFormatter");
	printer.println("java.util.logging.SimpleFormatter.format = %1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS.%1$tL %4$s: %5$s [%2$s]%6$s%n");

	printer.println("java.util.logging.FileHandler.pattern = jMetal.log");
	printer.println("java.util.logging.FileHandler.level = ALL");

	printer.println("java.util.logging.ConsoleHandler.level = ALL");

	// Retrieve custom configuration
	File defaultFile = new File("jMetal.log.ini");
	if (propertyFile != null) {
		printer.println(FileUtils.readFileToString(propertyFile));
	} else if (defaultFile.exists()) {
		printer.println(FileUtils.readFileToString(defaultFile));
	} else {
		// use only default configuration
	}
	printer.close();

	// Apply configuration
	LogManager manager = LogManager.getLogManager();
	manager.readConfiguration(IOUtils.toInputStream(new String(stream
			.toByteArray(), Charset.forName("UTF-8"))));
	logger.info("Loggers configured with " + propertyFile);
}
 

@Override
public void accept(LogManager t) throws IOException {
    t.readConfiguration();
}
 

static private void configureLogging(List<String> loggers) {
    
    InputStream in = 
        JSqsh.class.getClassLoader().getResourceAsStream(LOGGING_CONFIG);
    if (in == null) {
        
        System.err.println("WARNING: Cannot find resource " 
            + LOGGING_CONFIG);
        return;
    }
    
    try {
        
        LogManager logMan = LogManager.getLogManager();
        logMan.readConfiguration(in);
        in.close();
    }
    catch (IOException e) {
        
        System.err.println("WARNING: Unable to read logging "
            + "properties " + LOGGING_CONFIG + ": " + e.getMessage());
    }

    /*
     * Turn on debugging if requested.
     */
    for (String logger : loggers) {
        
        Logger log = Logger.getLogger(logger);
        if (log != null) {
            
            log.setLevel(Level.FINE);
            System.out.println("Debugging level for '"
                + log.getName() + "' is now '"
                + log.getLevel().getName() + "'");
        }
        else {
            
            System.err.println("--debug: Unable to find logger '"
                + logger + "'");
            System.exit(1);
        }
    }
}
 

/**
 * A system test for a logger configured using the candybean logger
 * configuration.
 * 
 * @throws Exception
 */
@Test
public void cbConfiguredLogger() throws Exception {
	String name1 = this.getClass().getSimpleName() + "1";
	String name2 = this.getClass().getSimpleName() + "2";
	String config1Path = Candybean.ROOT_DIR + File.separator + name1 + ".config";
	String config2Path = Candybean.ROOT_DIR + File.separator + name2 + ".config";
	String log1Path = Candybean.ROOT_DIR + File.separator + "log" + File.separator + name1 + ".log";
	String log2Path = Candybean.ROOT_DIR + File.separator + "log" + File.separator + name2 + ".log";
	
	// Load the initial properties from the candybean config file
       Properties initialProperties = candybean.config.getPropertiesCopy();
	
	// Change the FileHandler Formatter to XMLFormatter
	initialProperties.setProperty("java.util.logging.FileHandler.formatter", "java.util.logging.XMLFormatter");
	initialProperties.setProperty("java.util.logging.ConsoleHandler.formatter", "java.util.logging.XMLFormatter");
	
	// Create a new config file and write props to that file
	File config1File = new File(config1Path);
	config1File.createNewFile();
	initialProperties.store(new FileOutputStream(config1File), null);

	// Update the system property that specifies where to load the logging configuration from.
	System.setProperty("java.util.logging.config.file", config1Path);
	LogManager.getLogManager().readConfiguration();
	logger = Logger.getLogger(this.getClass().getSimpleName());
	
	// Log to file and verify text
	File log1File = new File(log1Path);
	FileHandler firstFileHandler = new FileHandler(log1Path);
	logger.addHandler(firstFileHandler);
	logger.info("First logged message configured using candybean configuration file");
	assertTrue(log1File.exists());
	assertEquals(getLinesInLogFile(log1File), 14);
	
	// Change the FileHandler Formatter to SimpleFormatter
	initialProperties.setProperty("java.util.logging.FileHandler.formatter", "java.util.logging.SimpleFormatter");
	initialProperties.setProperty("java.util.logging.ConsoleHandler.formatter", "java.util.logging.SimpleFormatter");
	
	// Create a second config file and write props to that file
	File config2File = new File(config2Path);
	config2File.createNewFile();
	initialProperties.store(new FileOutputStream(config2File), null);

	// Update the system property that specifies where to load the logging configuration from.
	System.setProperty("java.util.logging.config.file", config2Path);
	LogManager.getLogManager().readConfiguration();
	logger = Logger.getLogger(this.getClass().getSimpleName());
	
	// Log to file and verify text
	File log2File = new File(log2Path);
	FileHandler secondFileHandler = new FileHandler(log2Path);
	logger.addHandler(secondFileHandler);
	logger.info("Second logged message configured using different candybean configuration file");
	assertTrue(log2File.exists());
	assertTrue(getLinesInLogFile(log2File) < 13);
	
	// Reset the logging config file path to the default and re-read the configuration
	System.setProperty("java.util.logging.config.file", candybean.config.configFile.getCanonicalPath());
	LogManager logManager = LogManager.getLogManager();
	logManager.readConfiguration();
	
	// Delete all created configuration and log files
	config1File.delete();
	log1File.delete();
	config2File.delete();
	log2File.delete();
}