logging日志（二） 扩展Handler

 

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.logging.Formatter;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.LogRecord;

public class TestHandler extends Handler {
	public TestHandler (){
		configure();
	}
	
	@Override
	public void close() throws SecurityException {
	}

	@Override
	public void flush() {
	}
	
	@Override
	public void publish(LogRecord record) {
		if (!isLoggable(record)) {
			return;
		}
		record.setMessage(getUserInfo(record.getMessage()));
		
		getFormatter().format(record);
		getUserInfo(record.getMessage());
	}
	
	 private void configure() {
		LogManager manager = LogManager.getLogManager();
		String cname = getClass().getName();
		Level lovel = getLevelProperty(manager, cname + ".level", Level.ALL);
		if (null != lovel) {
			setLevel(lovel);
		} 
		
		UploadFormatter formatter = (UploadFormatter) getFormatterProperty(manager, cname + ".formatter",  new UploadFormatter());
		if (null != formatter) {
			setFormatter(formatter);
		}
	}
	 
    private Level getLevelProperty(LogManager manager, String name, Level defaultValue) {
    	String val = manager.getProperty(name);
    	if (val == null) {
    	    return defaultValue;
    	}
    	try {
    	    return Level.parse(val.trim());
    	} catch (Exception ex) {
    	    return defaultValue;
    	}
    }  
    
    Formatter getFormatterProperty(LogManager manager, String name, Formatter defaultValue) {
		String val = manager.getProperty(name);
		try {
			if (val != null) {
				Class clz = ClassLoader.getSystemClassLoader().loadClass(val);
				return (Formatter) clz.newInstance();
			}
		} catch (Exception ex) {
			// We got one of a variety of exceptions in creating the
			// class or creating an instance.
			// Drop through.
		}
		// We got an exception. Return the defaultValue.
		return defaultValue;
	}
    
	static InetAddress addr = null;
	static {
		try {
			addr = InetAddress.getLocalHost();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
	}

	public String getUserInfo(String expmsg) {
		String username = Conf.getInstance().getProperty("username");
		String datetime = getCurrentDateTime();
		String localIP = getLocalIP();
		if (null == username || null == localIP) {
			return "";
		}
		StringBuffer sb = new StringBuffer();
		sb.append("{");
		sb.append("username:").append(username);
		sb.append(",datetime:").append(datetime);
		sb.append(",localIP:").append(localIP);
		sb.append(",expmsg:").append(expmsg);
		sb.append("}");
		return sb.toString();
	}

	public String getLocalIP() {
		byte[] ipAddr = addr.getAddress();
		String ipAddrStr = "";
		for (int i = 0; i < ipAddr.length; i++) {
			if (i > 0) {
				ipAddrStr += ".";
			}
			ipAddrStr += ipAddr[i] & 0xFF;
		}
		return ipAddrStr;
	}

	public String getCurrentDateTime() {
		String dateformat = "yyyy-MM-dd HH:mm:ss";
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);
		String strDateFolder = dateFormat.format(date);
		return strDateFolder;

	}