40d57d9a208d001c1487de563adc4702

一个类似于log4j的小软件

package main.cn.edu.nju.software.sd.cll;
import java.util.Date;
import java.text.SimpleDateFormat;
import java.util.*;
/**
 * Logger类，CLL工程的核心所在 
 * @author ohai
 * */
public class Logger{
	private String name;
	private Level loggerlevel;
	private Format logformat;
    private ArrayList<Handler> handlers = new ArrayList<Handler>();
    public static final long startTime = System.currentTimeMillis();
    public Logger parent;
    
    /**默认的配置用于当在配置文件中没有父logger的配置的时候用来配置父logger，*/
    public final static Level defaultLevel = Level.TRACE;
    public final static Format defaultFormat = new Format("%n-%e-%m");
    public final static Handler defaultHandler = new ConsoleHandler();
	
	private static LogManager manager = LogManager.getLogManager();
	private static Logger rootLogger;
	
	/**构造方法*/
	public Logger(){}
	public Logger(String n)
	{
		name = n;
	}
	public static Logger getRootLogger()
	{
		if(rootLogger==null)
		{
			rootLogger = new Logger(" ");
			Configuration.initRootLogger(rootLogger);
		}
		return rootLogger;
	}
	/**两种获得logger的方法*/
	public static Logger getLogger(Class clazz) {
		System.out.println("root");
		String namestr = clazz.getName();
		Logger logger = manager.getLogger(namestr);
		return logger;
	}
	
	public static Logger getLogger(String namestr) {
		Logger logger = manager.getLogger(namestr);
		return logger;
	}

	/**logger的配置*/
	public void removeHandle(Handler handler)
	{
		
	}

	/**获得logger的名字*/
	public String getName()
	{
		return name;
	}
	
	/**获得和设置logger的level*/
	public Level getLevel()
	{
		return loggerlevel;
	}
	public void setLevel(Level l)
	{
		loggerlevel = l;
	}

	/**设置output destintion*/
	public void addHandler(Handler h)
	{
		if(h!=null)
		{
		    handlers.add(h);
		}
	}
	public ArrayList<Handler> getHandlers()
	{
		return handlers;
	}
	/**设置format*/
	public void setFormat(Format format)
	{
		logformat = format;
	}

	public Format getFormat()
	{
		return logformat;
	}

	/**记录并封装信息,最后向目的地输出信息*/
	public void log(Level level, String message) {
		Date d = new Date();
		SimpleDateFormat sd = new SimpleDateFormat("yyyy/MM/dd-HH:mm:ss");
		String date = sd.format(d);
		String logname = name;
		String result = " ";
		StackTraceElement stack[] = (new Throwable()).getStackTrace();
		int i = stack.length-1;
		String callClass = stack[1].getClassName();
		String callee = stack[1].getMethodName();
		int lineno = stack[1].getLineNumber();
		LogRecord record = new LogRecord(logname,level,message,callClass,callee,lineno,date,0);
		boolean loggable = loggableOrNot(level);
		if(loggable)
		{
			Format formator = logformat;
			if(formator==null)
			{
				formator = manager.getParentFormat(this);
			}
			result = formator.doFormat(record);
			ArrayList<Handler> array = handlers;
			if(array.isEmpty())
			{
				array = manager.getParentHandler(this);
			}
			for(int t=0;t<array.size();t++)
			{
				Handler handler = array.get(t);
				handler.publish(result);
			}
		}
	}

	/**判断是否可以log,如果当前logger的level没有配置,则比较父logger的level */
	public boolean loggableOrNot(Level level)
	{
		boolean isLoggable;
		Level l = loggerlevel;
//		System.out.println(l.toString());
		if(l==null)
		{
			l = manager.getParentLevel(this);
		}
		if(level.intlevel<l.intlevel)
			isLoggable = false;
		else 
			isLoggable = true;
		
		return isLoggable;
	}
}