Java Log的使用方法

Java的Log是一个非常强大的写日志的工具包，程序员可以随时把一些想要记录的信息输出到本地文件，可以用于观察程序运行状况等，下面给出一个简单的小程序。 http://supportweb.cs.bham.ac.uk/documentation/tutorials/docsystem/build/tutorials/log4j/log4j.html 有log的相信说明文档

import org.apache.log4j.FileAppender;

import org.apache.log4j.Logger;

import org.apache.log4j.Level;

import org.apache.log4j.SimpleLayout;

public class ApacheLog {

        public static void main(String args[]) {

           Logger logger = Logger.getLogger(ApacheLog.class);

           SimpleLayout layout = new SimpleLayout();

           FileAppender appender = null;

           try {

                 appender = new FileAppender(layout, "myApacheLog.log", false);

           } catch (Exception e) {

           }

           logger.addAppender(appender);

           // Set the logger level to Level.INFO

           logger.setLevel(Level.INFO);

           // This request will be disabled since Level.DEBUG < Level.INFO.

           logger.debug("This is debug.");

           // These requests will be enabled.

           logger.info("This is an info.");

           logger.warn("This is a warning.");

           logger.error("This is an error.");

           logger.fatal("This is a fatal error.");

     }

}