simpletextformatter.java

一个用java编写的服务器,对于学习网络编程的人来说是个很好的例子

/*
 * This file is part of the QuickServer library 
 * Copyright (C) 2003-2005 QuickServer.org
 *
 * Use, modification, copying and distribution of this software is subject to
 * the terms and conditions of the GNU Lesser General Public License. 
 * You should have received a copy of the GNU LGP License along with this 
 * library; if not, you can download a copy from <http://www.quickserver.org/>.
 *
 * For questions, suggestions, bug-reports, enhancement-requests etc.
 * visit http://www.quickserver.org
 *
 */

package org.quickserver.util.logging;

import java.util.Date;
import java.text.SimpleDateFormat;
import java.util.logging.*;
import java.io.*;
import org.quickserver.util.MyString;

/**
 * Formats the LogRecord as "MM-dd-yyyy hh:mm:ss,SSS [LEVEL] - Class.method() - MESSAGE"
 * @since 1.3.2
 */
public class SimpleTextFormatter extends Formatter {
	private Date date = new Date();
	private SimpleDateFormat df = new SimpleDateFormat("MM-dd-yyyy hh:mm:ss,SSS");

    private String lineSeparator = (String) java.security.AccessController.doPrivileged(
		new sun.security.action.GetPropertyAction("line.separator"));

	public synchronized String format(LogRecord record) {
		date.setTime(record.getMillis());

		StringBuffer sb = new StringBuffer();
		sb.append(df.format(date));
		sb.append(" [");
		sb.append(MyString.alignLeft(record.getLevel().getLocalizedName(), 7));
		sb.append("] ");
		if(record.getSourceClassName() != null) {
			sb.append(record.getSourceClassName());
		} else {
			sb.append(record.getLoggerName());
		}
		if(record.getSourceMethodName() != null) {	
			sb.append('.');
			sb.append(record.getSourceMethodName());
		}
		sb.append(" - ");
		sb.append(formatMessage(record));
				
		if(record.getThrown() != null) {
			sb.append(lineSeparator);
			sb.append("[StackTrace: ");
			try {
				StringWriter sw = new StringWriter();
				PrintWriter pw = new PrintWriter(sw);
				record.getThrown().printStackTrace(pw);
				pw.close();
				sb.append(sw.toString());
			} catch(Exception ex) {
				sb.append(record.getThrown().toString());
			}
			sb.append(']');
		}
		
		sb.append(lineSeparator);
		return  sb.toString();		
	}
}