WriterAppender in Log4j
In our previous section we have seen that we can append
log events in simple file (plain/text) file and to the console also. If we want
to write files then we have to use WriterAppender. WriterAppender
appends log events to a Writer or an OutputStream depending on the
user's choice.
In our example we have created a class
WriterAppenderExample . First we need to create logger object and then we
have to add appender to it. So we have created an object of WriterAppender and
since it requires Writer or OutputStream we are using a file "Writer.html".
We have taken layout of HTML format that therefore we have to use HTMLLayout.
logger.addAppender(writeappender); will add
writerappender to logger and all logging events will be added to this HTML
file.
Here is the example code for WriterAppenderExample
class:
WriterAppenderExample.java
import java.io.*;
import org.apache.log4j.*;
public class WriterAppenderExample {
static Logger logger =
Logger.getLogger("WriterAppenderExample.class");
public static void main(String[] args) {
try{
FileOutputStream filename=
new FileOutputStream("Writer.html");
WriterAppender writeappender =
new WriterAppender(new HTMLLayout(),filename);
logger.addAppender(writeappender);
logger.info("Welcome");
logger.info("to");
logger.info("Rose India");
logger.info("Writer Appender");
logger.info("Example");
logger.info("-----------");
}catch(Exception e){
System.out.println("Exception is ="+e.getMessage());
}
}
}
|
Output:
After compilation and execution of WriterAppenderExample.java
will add the log events in "Writer.html" file in the HTML
format as since we have used HTMLLayout() . Output will look like this.
Download Source Code
|
Del.icio.us
Digg
Google
Spurl
Blink
Furl
Simpy
Y! MyWeb
