Java Logging API generowanie pustych plików dziennika

Próbowałem przejść przez tutorial Java Logging API:Java Logging API generowanie pustych plików dziennika

www.vogella.com/articles/Logging/article.html

Ale wygenerowane pliki są puste (testowane w Netbeans, Eclipse oraz uruchamianie słoika z cmd). Komunikaty dziennika są wyświetlane tylko w konsoli.

Następujące pliki są używane w projekcie. Jaki może być powód takiego zachowania?

Projekt: de.vogella.logger

MyHtmlFormatter.java

package de.vogella.logger; 

import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.logging.Formatter; 
import java.util.logging.Handler; 
import java.util.logging.Level; 
import java.util.logging.LogRecord; 

//This custom formatter formats parts of a log record to a single line 
class MyHtmlFormatter extends Formatter { 
    // This method is called for every log records 
    public String format(LogRecord rec) { 
    StringBuffer buf = new StringBuffer(1000); 
    // Bold any levels >= WARNING 
    buf.append("<tr>"); 
    buf.append("<td>"); 

    if (rec.getLevel().intValue() >= Level.WARNING.intValue()) { 
     buf.append("<b>"); 
     buf.append(rec.getLevel()); 
     buf.append("</b>"); 
    } else { 
     buf.append(rec.getLevel()); 
    } 
    buf.append("</td>"); 
    buf.append("<td>"); 
    buf.append(calcDate(rec.getMillis())); 
    buf.append(' '); 
    buf.append(formatMessage(rec)); 
    buf.append('\n'); 
    buf.append("<td>"); 
    buf.append("</tr>\n"); 
    return buf.toString(); 
    } 

    private String calcDate(long millisecs) { 
    SimpleDateFormat date_format = new SimpleDateFormat("MMM dd,yyyy HH:mm"); 
    Date resultdate = new Date(millisecs); 
    return date_format.format(resultdate); 
    } 

    // This method is called just after the handler using this 
    // formatter is created 
    public String getHead(Handler h) { 
    return "<HTML>\n<HEAD>\n" + (new Date()) 
     + "\n</HEAD>\n<BODY>\n<PRE>\n" 
     + "<table width=\"100%\" border>\n " 
     + "<tr><th>Level</th>" + 
     "<th>Time</th>" + 
     "<th>Log Message</th>" + 
     "</tr>\n"; 
    } 

    // This method is called just after the handler using this 
    // formatter is closed 
    public String getTail(Handler h) { 
    return "</table>\n </PRE></BODY>\n</HTML>\n"; 
    } 
}

MyLogger.java

package de.vogella.logger; 

import java.io.IOException; 
import java.util.logging.FileHandler; 
import java.util.logging.Formatter; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import java.util.logging.SimpleFormatter; 

public class MyLogger { 
    static private FileHandler fileTxt; 
    static private SimpleFormatter formatterTxt; 

    static private FileHandler fileHTML; 
    static private Formatter formatterHTML; 

    static public void setup() throws IOException { 

    // Get the global logger to configure it 
    Logger logger = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME); 

    logger.setLevel(Level.INFO); 
    fileTxt = new FileHandler("Logging.txt"); 
    fileHTML = new FileHandler("Logging.html"); 

    // Create txt Formatter 
    formatterTxt = new SimpleFormatter(); 
    fileTxt.setFormatter(formatterTxt); 
    logger.addHandler(fileTxt); 

    // Create HTML Formatter 
    formatterHTML = new MyHtmlFormatter(); 
    fileHTML.setFormatter(formatterHTML); 
    logger.addHandler(fileHTML); 
    } 
}

UseLogger.java

package de.vogella.logger.test; 

import java.io.IOException; 
import java.util.logging.Level; 
import java.util.logging.Logger; 

import de.vogella.logger.MyLogger; 

public class UseLogger { 
    // Always use the classname, this way you can refactor 
    private final static Logger LOGGER = Logger.getLogger(UseLogger.class 
     .getName()); 

    public void doSomeThingAndLog() { 
    // Image here some real work 

    // Now we demo the logging 

    // Set the LogLevel to Severe, only severe Messages will be written 
    LOGGER.setLevel(Level.SEVERE); 
    LOGGER.severe("Info Log"); 
    LOGGER.warning("Info Log"); 
    LOGGER.info("Info Log"); 
    LOGGER.finest("Really not important"); 

    // Set the LogLevel to Info, severe, warning and info will be written 
    // Finest is still not written 
    LOGGER.setLevel(Level.INFO); 
    LOGGER.severe("Info Log"); 
    LOGGER.warning("Info Log"); 
    LOGGER.info("Info Log"); 
    LOGGER.finest("Really not important"); 
    } 

    public static void main(String[] args) { 
    UseLogger tester = new UseLogger(); 
    try { 
     MyLogger.setup(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
     throw new RuntimeException("Problems with creating the log files"); 
    } 
    tester.doSomeThingAndLog(); 
    } 
}

Źródło

2013-05-20 endriu

Zmień następujący wiersz (w metodzie de.vogella.logger.MyLogger.setup()):

// Get the global logger to configure it 
Logger logger = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);

// Get the global logger to configure it 
Logger logger = Logger.getLogger("");

Zobacz więcej:

Źródło

2013-05-20 06:37:46

Dziękuję bardzo! :) – endriu

@endriu Serdecznie zapraszamy! ;) –

Java Logging API generowanie pustych plików dziennika

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