【ThinkingInJava】25、将错误输出记录到日志

【ThinkingInJava】25、将异常输出记录到日志

/**
* 书本:《Thinking In Java》
* 功能:将异常输出记录到日志中。
* 文件:LoggingExceptions.java
* 时间:2015年4月8日21:11:51
* 作者:cutter_point
*/
package Lesson12_error_handling_with_exceptions;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.logging.Logger;

class LoggingException extends Exception
{
	private static Logger logger = Logger.getLogger("LoggingException");
	
	public LoggingException()
	{
		StringWriter trace = new StringWriter();
		printStackTrace(new PrintWriter(trace));
		logger.severe(trace.toString());
	}
}

public class LoggingExceptions
{
	public static void main(String [] args)
	{
		try 
		{
			throw new LoggingException();
		} 
		catch (LoggingException e) 
		{
			System.err.println("Caught " + e);
		}
		
		try 
		{
			throw new LoggingException();
		} 
		catch (LoggingException e) 
		{
			System.err.println("Caught " + e);
		}
	}

}

输出：

五月 04, 2015 3:53:49 下午 Lesson12_error_handling_with_exceptions.LoggingException <init>
严重: Lesson12_error_handling_with_exceptions.LoggingException
    at Lesson12_error_handling_with_exceptions.LoggingExceptions.main(LoggingExceptions.java:32)

Caught Lesson12_error_handling_with_exceptions.LoggingException
五月 04, 2015 3:53:49 下午 Lesson12_error_handling_with_exceptions.LoggingException <init>
严重: Lesson12_error_handling_with_exceptions.LoggingException
    at Lesson12_error_handling_with_exceptions.LoggingExceptions.main(LoggingExceptions.java:41)

Caught Lesson12_error_handling_with_exceptions.LoggingException