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Voovan is a java framwork and it not depends on any third-party framework.
There is a newer version: 4.3.8
package org.voovan.tools.log;

import org.voovan.tools.TEnv;
import org.voovan.tools.TObject;
import org.voovan.tools.TString;

/**
 * 日志工具类
 * 
 * @author helyho
 *
 *         Voovan Framework. WebSite: https://github.com/helyho/Voovan Licence:
 *         Apache v2 License
 */
public class Logger {
	private static Formater	formater	= Formater.newInstance();
	private static boolean state = true;
	
	/**
	 * 日志输出状态
	 * 		
	 * @return true:输出日志,false 不输出任何日志
	 */
	public static boolean isState() {
		return state;
	}

	/**
	 * 设置日志输出状态
	 * @param state true:输出日志,false 不输出任何日志
	 */
	public static void setState(boolean state) {
		Logger.state = state;
	}

	/**
	 * 判断是否包含指定的日志级别
	 * @param logLevel  日志级别
	 * @return true: 包含, false: 不包含
	 */
	public static boolean isLogLevel(String logLevel){
		if(formater.getLogLevel().contains("ALL")){
			return true;
		}

		if(formater.getLogLevel().contains(logLevel)){
			return true;
		}else{
			return false;
		}
	}

	public static void debug(Object msg) {
		try {
			msg = TObject.nullDefault(msg,"null");
			Message message = Message.newInstance("DEBUG", msg.toString());
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void info(Object msg) {
		try {
			msg = TObject.nullDefault(msg,"null");
			Message message = Message.newInstance("INFO", msg.toString());
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void warn(Object msg) {
		try {
			msg = TObject.nullDefault(msg,"null");
			Message message = Message.newInstance("WARN", msg.toString());
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void warn(Exception e) {
		try {
			String msg = e.getClass().getCanonicalName() + ": " + e.getMessage() + "\r\n"
					+ TString.indent(TEnv.getStackElementsMessage(e.getStackTrace()), 8);
			Message message = Message.newInstance("WARN", msg);
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + e.getMessage());
		}
	}

	public static void warn(Object msg, Exception e) {
		try {
			msg = TObject.nullDefault(msg,"null");
			String msgStr = e.getClass().getCanonicalName() + ": " + msg + "\r\n"
					+ TString.indent(TEnv.getStackElementsMessage(e.getStackTrace()), 8);
			Message message = Message.newInstance("WARN", msgStr);
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void error(Object msg) {
		try {
			msg = TObject.nullDefault(msg,"null");
			Message message = Message.newInstance("ERROR", msg.toString());
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void error(Exception e) {
		try {
			String msg = e.getClass().getCanonicalName() + ": " + e.getMessage() + "\r\n"
					+ TString.indent(TEnv.getStackElementsMessage(e.getStackTrace()), 8);
			Message message = Message.newInstance("ERROR", msg);
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + e.getMessage());
		}
	}

	public static void error(Object msg, Exception e) {
		try {
			msg = TObject.nullDefault(msg,"null");
			String msgStr = msg + " => " +  e.getClass().getCanonicalName() + ": " + e.getMessage() + "\r\n"
					+ TString.indent(TEnv.getStackElementsMessage(e.getStackTrace()), 8);
			Message message = Message.newInstance("ERROR", msgStr);
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void fatal(Object msg) {
		try {
			msg = TObject.nullDefault(msg,"null");
			Message message = Message.newInstance("FATAL", msg.toString());
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void fatal(Exception e) {
		try {
			String msg = e.getClass().getCanonicalName() + ": " + e.getMessage() + "\r\n"
					+ TString.indent(TEnv.getStackElementsMessage(e.getStackTrace()), 8);
			Message message = Message.newInstance("FATAL", msg);
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + e.getMessage());
		}
	}

	public static void fatal(Object msg, Exception e) {
		try {
			msg = TObject.nullDefault(msg,"null");
			String msgStr = e.getClass().getCanonicalName() + ": " + msg + "\r\n"
					+ TString.indent(TEnv.getStackElementsMessage(e.getStackTrace()), 8);
			Message message = Message.newInstance("FATAL", msgStr);
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			simple("Logger system error:"+oe.getMessage()+"\r\n");
			simple(TEnv.getStackElementsMessage(oe.getStackTrace()));
			simple("Output message is: " + msg);
		}
	}

	public static void simple(Object msg) {
		try {
			msg = TObject.nullDefault(msg,"null");
			Message message = Message.newInstance("SIMPLE", msg.toString());
			formater.writeFormatedLog(message);
		} catch (Exception oe) {
			System.out.println("Logger system error:"+oe.getMessage()+"\r\n");
			System.out.println(TEnv.getStackElementsMessage(oe.getStackTrace()));
			System.out.println("Output message is: " + msg);
		}
	}
}