Java Formatter類代碼示例

import java.util.logging.Formatter; //導入依賴的package包/類
public void testUnknownLevels() throws IOException {
    TestLevel level = new TestLevel("WARN", 233);
    LogRecord r = new LogRecord(level, "Custom level test");
    Formatter formatter = new LogFormatter();
    String s = formatter.format(r);
    cleanKnownLevels();
    final LogRecord[] rPtr = new LogRecord[] { null };
    Handler h = new Handler() {
        @Override
        public void publish(LogRecord record) {
            rPtr[0] = record;
        }
        @Override
        public void flush() {}
        @Override
        public void close() throws SecurityException {}
    };
    LogRecords.scan(new ReaderInputStream(new StringReader(s)), h);
    assertEquals("level", r.getLevel(), rPtr[0].getLevel());
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
@Override
public void publish(LogRecord record) {
	Formatter actualFormatter = formatter;
	if (actualFormatter != null) {
		String message = actualFormatter.format(record); 
		notification.sendNotification(
			new JMXLogRecordNotification(
				objectName,
				sequenceNumber++, 
				record.getMillis(),
				message,
				record
			)
		);
	}
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
/** Set up console handler */
public static Handler setUpConsoleHandler() {
	final ConsoleHandler handler = new ConsoleHandler() {
		@Override
		protected void setOutputStream(final OutputStream out) throws SecurityException {
			super.setOutputStream(System.out);
		}
	};
	handler.setLevel(Level.ALL);
	final Formatter formatter = new Formatter() {
		@Override
		public String format(final LogRecord record) {
			return record.getMessage();
		}
	};
	handler.setFormatter(formatter);
	return handler;
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
private static void initLog()
{
	Formatter simpleFormatter;

	try
	{
		String path = new File(".").getCanonicalPath();
		String logName = String.valueOf(System.currentTimeMillis());
		simpleFormatter = new SimpleFormatter();
		fileHandler = new FileHandler(path + logName + ".log");
		fileHandler.setFormatter(simpleFormatter);
		fileHandler.setLevel(Level.ALL);
	}
	catch (IOException e)
	{
		errorLog.log(Level.WARNING, e.getMessage(), e);
	}
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
@Test
public void formatNullThrown() throws Exception {
    final String previousLineSeparatorProperty = System.getProperty(LINE_SEPARATOR_KEY);
    try {
        final String lineSeparatorValue = "\n";
        final String logMessage = "An example log record";
        final Level level = Level.FINEST;

        System.setProperty(LINE_SEPARATOR_KEY, lineSeparatorValue);
        final LogRecord logRecordInput = new LogRecord(level, logMessage);
        logRecordInput.setThrown(null);

        final Formatter formatter = new SimpleTomEEFormatter();
        final String actualFormatOutput = formatter.format(logRecordInput);

        final String expectedFormatOutput = level.getLocalizedName() + " - " + logMessage + "\n";

        assertEquals(expectedFormatOutput, actualFormatOutput);
    } finally {
        System.setProperty(LINE_SEPARATOR_KEY, previousLineSeparatorProperty);
    }
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
@Test
public void formatNotNullThrown() throws Exception {
    final String previousLineSeparatorProperty = System.getProperty(LINE_SEPARATOR_KEY);

    try {
        final String lineSeparatorValue = "\n";
        final String logMessage = "An example log record";
        final Level level = Level.CONFIG;
        final String exceptionMessage = "An example exception";
        final Throwable thrown = new Exception(exceptionMessage);

        System.setProperty(LINE_SEPARATOR_KEY, lineSeparatorValue);
        final LogRecord logRecordInput = new LogRecord(level, logMessage);
        logRecordInput.setThrown(thrown);

        final Formatter formatter = new SimpleTomEEFormatter();
        final String actualFormatOutput = formatter.format(logRecordInput);

        final String expectedFormatOutput = level.getLocalizedName() + " - " + logMessage + lineSeparatorValue + ExceptionUtils.getStackTrace(thrown);

        assertEquals(expectedFormatOutput, actualFormatOutput);
    } finally {
        System.setProperty(LINE_SEPARATOR_KEY, previousLineSeparatorProperty);
    }
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
/**
 * 
 * @param args the
 */
public static void main(String[] args) {
	Logger logger = Logger.getLogger("test");
	logger.info("test");
	
	logger.addHandler(new ConsoleHandler());
	logger.info("tes");
	
	Formatter f = new SESLogFormatter("prefix");
	
	Handler[] handlers = logger.getHandlers();
	Handler handler;
	
	logger.info("" + handlers.length);
	for (int i = 0; i < handlers.length; i++) {
		handler = handlers[i];
		handler.setFormatter(f);
	}
	
	logger.info("test2");
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
@SuppressLint("SimpleDateFormat")
protected FileHandler createHandler(String finalPath) throws IOException {
	FileHandler h = new FileHandler(finalPath, MAX_SIZE, 3, true);
	
	final DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
	final String sep = System.getProperty("line.separator");
	
	h.setFormatter(new Formatter() {
		
		@Override
		public String format(LogRecord r) {
			String date = format.format(new Date(r.getMillis()));
			return String.format(Locale.US, "%s [%s]: (%d) %s%s", date, r.getLevel(), r.getThreadID(), r.getMessage(), sep);
		}
		
	});
	
	h.setLevel(Level.ALL);
	return h;
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
public void testFormatterDoesNotIncludeHashOnEditor() throws ClassNotFoundException {
    LogRecord r = new LogRecord(Level.INFO, "EDIT");
    JEditorPane ep = new javax.swing.JEditorPane();
    ep.setName("SomeName");
    r.setParameters(new Object[] { ep });
    Formatter formatter = new LogFormatter();
    String s = formatter.format(r);
    assertEquals("No @\n" + s, -1, s.indexOf("@"));
    if (s.indexOf("SomeName") == -1) {
        fail("SomeName should be there:\n" + s);
    }
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
public void testOwnFormatter() throws UnsupportedEncodingException {
    class MyFrmtr extends Formatter {
        private int cnt;
        @Override
        public String format(LogRecord record) {
            cnt++;
            return record.getMessage();
        }
    }
    MyFrmtr my = new MyFrmtr();
    
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    StreamHandler sh = new StreamHandler(os, NbFormatter.FORMATTER);
    DispatchingHandler dh = new DispatchingHandler(sh, 10);
    dh.setFormatter(my);
    dh.publish(new LogRecord(Level.WARNING, "Ahoj"));
    dh.flush();
    String res = new String(os.toByteArray(), "UTF-8");
    assertEquals("Only the message is written", "Ahoj", res);
    assertEquals("Called once", 1, my.cnt);
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
private static Logger createMetricUpdateTracer() {
  Logger logger = Logger.getLogger(TracingMetricRegistry.class.getName() + ".metricUpdates");
  ConsoleHandler handler = new ConsoleHandler();
  handler.setFormatter(new Formatter() {
    @Override
    public String format(LogRecord record) {
      return ">>" + record.getMessage() + "\n";
    }
  });
  logger.addHandler(handler);
  logger.setUseParentHandlers(false);
  handler.setLevel(Level.ALL);
  //logger.setLevel(Level.ALL);

  return logger;
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
@Override
    public synchronized void init(ProcessingEnvironment processingEnv) {
        super.init(processingEnv);
        final Optional<String> jtsgenLogLevel = Optional.ofNullable(processingEnv.getOptions().get("jtsgenLogLevel"));
        String packageName = AbstractProcessorWithLogging.class.getPackage().getName();
        final Logger logger = Logger.getLogger(packageName);
        if (jtsgenLogLevel.isPresent()) {
            Level level = jtsgenLogLevel
                    .map(
                            (x) -> {
                                try {
                                    return Level.parse(x.trim().toUpperCase());
                                } catch (IllegalArgumentException ex) {
                                    return Level.OFF;
                                }
                            }
                    ).orElse(Level.INFO);
            Formatter oneLineFormatter = new OneLineFormatter();
            ConsoleHandler consoleHandler = new ConsoleHandler();
            consoleHandler.setLevel(level);
            consoleHandler.setFormatter(oneLineFormatter);
            logger.setUseParentHandlers(false);
            logger.setLevel(level);

//        consoleHandler.setFormatter(oneLineFormatter);
            logger.addHandler(consoleHandler);
            LOG.log(Level.FINER,() -> String.format("LogLevel %s = %s ", packageName, level.getName()));
        } else {
            logger.setLevel(Level.OFF);
        }
    }
 

import java.util.logging.Formatter; //導入依賴的package包/類
private SystemLogger(String name, String rootpath, String logFilePattern, int logBufferSize, int fileSizeLimit,
        int fileCountLimit, boolean append, Formatter format) {

    this.filePattern = logFilePattern;
    this.fileSizeLimit = fileSizeLimit;
    this.fileCountLimit = fileCountLimit;
    this.logBufferSize = logBufferSize;
    this.shouldAppend = append;

    log = new PLogger(name);
    log.enableConsoleOut(true);
    log.setLogLevel(LogLevel.INFO);

    this.logRoot = rootpath + "/logs";

    if (!IOHelper.exists(logRoot)) {
        IOHelper.createFolder(logRoot);
    }

    log.enableFileOut(this.logRoot + "/" + this.filePattern, true, this.logBufferSize, this.fileSizeLimit,
            this.fileCountLimit, this.shouldAppend, format);
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
/**
 * Do some common setup for all applications at startup
 * @param name the application name used for Java logging and database logging
 */
public static void appSetup(String name)
{
    // Set our platform wide L&F 
    System.setProperty("swing.defaultlaf", "javax.swing.plaf.nimbus.NimbusLookAndFeel");
    UIDefaults defaults = UIManager.getLookAndFeelDefaults();
    defaults.put("Table.gridColor", new Color(140,140,140));
    defaults.put("Table.showGrid", true);
    
    // Set the program name which is used by PostgresqlDatabase to identify the app in logs
    System.setProperty("program.name", name);
    
    // Start with a fresh root set at warning
    Logger root = LogManager.getLogManager().getLogger("");
    Formatter format = new SingleLineFormatter();

    root.setLevel(Level.WARNING);
    for(Handler handler : root.getHandlers()) {
        root.removeHandler(handler);
    }

    // Set prefs levels before windows preference load barfs useless data on the user
    Logger.getLogger("java.util.prefs").setLevel(Level.SEVERE);
    // postgres JDBC spits out a lot of data even though we catch the exception
    Logger.getLogger("org.postgresql.jdbc").setLevel(Level.OFF);
    Logger.getLogger("org.postgresql.Driver").setLevel(Level.OFF);

    // Add console handler if running in debug mode
    if (Prefs.isDebug()) {
        ConsoleHandler ch = new ConsoleHandler();
        ch.setLevel(Level.ALL);
        ch.setFormatter(format);
        root.addHandler(ch);
    }

    // For our own logs, we can set super fine level or info depending on if debug mode and attach dialogs to those
    Logger applog = Logger.getLogger("org.wwscc");
    applog.setLevel(Prefs.isDebug() ? Level.FINEST : Level.INFO);
    applog.addHandler(new AlertHandler());

    Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() {
        @Override
        public void uncaughtException(Thread t, Throwable e) {
            applog.log(Level.WARNING, String.format("\bUncaughtException in %s: %s", t, e), e);
        }});

    try {
        File logdir = Prefs.getLogDirectory().toFile();
        if (!logdir.exists())
            if (!logdir.mkdirs())
                throw new IOException("Can't create log directory " + logdir);
        FileHandler fh = new FileHandler(new File(logdir, name+".%g.log").getAbsolutePath(), 1000000, 10, true);
        fh.setFormatter(format);
        fh.setLevel(Level.ALL);
        root.addHandler(fh);
    } catch (IOException ioe) {
        JOptionPane.showMessageDialog(FocusManager.getCurrentManager().getActiveWindow(),
                "Unable to enable logging to file: " + ioe, "Log Error", JOptionPane.ERROR_MESSAGE);
    }

    // force the initialization of IdGenerator on another thread so app can start now without an odd delay later
    new Thread() {
        public void run() {
            IdGenerator.generateId();
        }
    }.start();
}
 

import java.util.logging.Formatter; //導入依賴的package包/類
public ColorLogFormatter(ColorConsoleBungee plugin, Formatter oldFormatter) {
    this.plugin = plugin;
    this.oldFormatter = oldFormatter;

    List<String> ignoreMessages = plugin.getConfiguration().getStringList("hide-messages");
    boolean colorizeTag = plugin.getConfiguration().getBoolean("colorPluginTag");
    boolean truncateColor = plugin.getConfiguration().getBoolean("truncateColor", false);

    Map<String, String> levelColors = Maps.newHashMap();
    if (plugin.getConfiguration().getBoolean("colorMessage", false)) {
        levelColors.put("FATAL", plugin.getConfiguration().getString("FATAL"));
        levelColors.put("ERROR", plugin.getConfiguration().getString("ERROR"));
        levelColors.put("WARN", plugin.getConfiguration().getString("WARN"));
        levelColors.put("DEBUG", plugin.getConfiguration().getString("DEBUG"));
        levelColors.put("TRACE", plugin.getConfiguration().getString("TRACE"));
    }

    this.formatter = new CommonFormatter(ignoreMessages, colorizeTag, truncateColor, levelColors);
}