logimpl.java

一个信息采集系统...对刚接触JSP和ＪＡＶＡ的人来说还有用

package com.briup.inf.impl;

import java.io.IOException;
import java.util.Date;
import java.util.Properties;

import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.FileAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.SimpleLayout;

import com.briup.exception.ConfigException;
import com.briup.inf.Config;
import com.briup.inf.Log;

/**
 * class LogImpl
 * 
 * @author Jimmy Zhou
 * @Date 2008-2-4 下午09:58:42
 */
public class LogImpl implements Log {

	// Logger: 决定什么日志信息应该被输出、什么日志信息应该被忽略；
	private Logger logger;

	private static Log log;

	private LogImpl(Properties pro) {
		logger = Logger.getRootLogger();

		// 设定输出级别,通过配置文件获得
		String level = pro.getProperty("level");
		logger.setLevel(Level.toLevel(level));

		// Layout: 指定日志信息的输出格式
		SimpleLayout sl = new SimpleLayout();

		// Appender: 指定日志信息应该输出到什么地方, 这些地方可以是控制台、文件、网络设备；
		FileAppender fa = null;
		ConsoleAppender ca = new ConsoleAppender(sl);
		String filepath;
		try {
			filepath = pro.getProperty("log_file_path");
			fa = new FileAppender(sl, filepath);
		} catch (IOException e) {
			e.printStackTrace();
		}
		logger.addAppender(fa);
		logger.addAppender(ca);
	}

	public static Log newInstance(Properties pro) {

		if (log == null) {
			log = new LogImpl(pro);
		}
		return log;
	}

	public void write(String log, int levelgrade) {

		switch (levelgrade) {
		case 1: {
			writeDebug(log);
			writeInfo(log);
			writeWarn(log);
			writeError(log);
			writeFatal(log);
			break;
		}
		case 2: {
			writeInfo(log);
			writeWarn(log);
			writeError(log);
			writeFatal(log);
			break;
		}
		case 3: {
			writeWarn(log);
			writeError(log);
			writeFatal(log);
			break;
		}
		case 4: {
			writeError(log);
			writeFatal(log);
			break;
		}
		case 5: {
			writeFatal(log);
			break;
		}
		default:
			writeInfo("Sorry, Please input appreciate priority!");
		}

	}

	public void writeDebug(String log) {
		logger.debug(log);
	}

	public void writeError(String log) {
		logger.error(log);
	}

	public void writeFatal(String log) {
		logger.fatal(log);
	}

	public void writeInfo(String log) {
		logger.info(log);
	}

	public void writeWarn(String log) {
		logger.warn(log);
	}

	public static void main(String[] agrs) {
		Properties pro = new Properties();
		Date date = new Date(System.currentTimeMillis());
		// pro.setProperty("level", "FATAL");
		// pro.setProperty("log_file_path", "src/com/briup/log.txt");
		pro.setProperty("config_file_path", "src/com/briup/config.xml");
		Config config = ConfigImpl.newInstance(pro);
		Log log = null;
		try {
			log = config.getLog();
		} catch (ConfigException e) {
			e.printStackTrace();
		}
		// Log log = new LogImpl(pro);
		log.writeDebug(date + " :debug Message");
		log.writeError(date + " :error Message");
		log.writeFatal(date + ":" + "fatal Message");
		log.writeInfo(date + " :info Message");
		log.write(date + " :Message of write", 1);

	}

}