封装 lo4j (转)-01

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本文介绍了一种基于Log4j的日志记录封装方法，通过创建Log4jLogger类实现不同级别的日志输出功能，包括trace、debug等，并支持格式化的字符串及异常堆栈跟踪。

import java.text.MessageFormat;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.spi.LoggingEvent;

/**
 * @ClassName: Log4jLogger
 * @Description: log4j封装
 * @author wenjianhai
 * @date 2011-5-19 下午03:49:48
 * @version V1.0
 */
public class Log4jLogger {

	private final Logger logger;
	private static final String FQCN;

	static {
		FQCN = Log4jLogger.class.getName();
	}
	
	private Log4jLogger(Class<?> clazz){
		logger = Logger.getLogger(clazz);
	}
	
	private Log4jLogger(){
		logger = Logger.getRootLogger();
	}
	
	public static Log4jLogger getLogger(Class<?> clazz){
		return new Log4jLogger(clazz);
	}
	
	public static Log4jLogger getRootLogger(){
		return new Log4jLogger();
	}
	
	public void trace(Object message){
		if(logger.isTraceEnabled()){
			forcedLog(logger, Level.TRACE, message);
		}
	}
	
	public void trace(Object message, Throwable t) {
		if (logger.isTraceEnabled()) {
			forcedLog(logger, Level.TRACE, message, t);
		}
	}

	public void trace(String pattern, Object... arguments) {
		if (logger.isTraceEnabled()) {
			forcedLog(logger, Level.TRACE, format(pattern, arguments));
		}
	}
	public void trace(String pattern, Throwable t, Object... arguments) {
		if (logger.isTraceEnabled()) {
			forcedLog(logger, Level.TRACE, format(pattern, arguments), t);
		}
	}
	
	public void debug(Object message) {
		if (logger.isDebugEnabled()) {
			forcedLog(logger, Level.DEBUG, message);
		}
	}

	public void debug(Object message, Throwable t) {
		if (logger.isDebugEnabled()) {
			forcedLog(logger, Level.DEBUG, message, t);
		}
	}

	public void debug(String pattern, Object... arguments) {
		if (logger.isDebugEnabled()) {
			forcedLog(logger, Level.DEBUG, format(pattern, arguments));
		}
	}
	public void debug(String pattern, Throwable t, Object... arguments) {
		if (logger.isDebugEnabled()) {
			forcedLog(logger, Level.DEBUG, format(pattern, arguments), t);
		}
	}