Log4j 总结（六） log4j 之 WriterAppender

public class WriterAppender extends AppenderSkeleton

WriterAppender()
          This default constructor does nothing.
WriterAppender(Layout layout, java.io.OutputStream os)
          Instantiate a WriterAppender and set the output destination to a new OutputStreamWriter initialized with os as its OutputStream.
WriterAppender(Layout layout, java.io.Writer writer)
          Instantiate a WriterAppender and set the output destination to writer.

Logger logger = Logger.getLogger("WriterAppender");

SimpleLayout layout = new SimpleLayout();
//Writer w = new Writer();
WriterAppender appender = new WriterAppender(layout, w);

logger.addAppender(appender);
logger.setLevel(Level.INFO);
...