eclipse如何使用log4j详解，你get了吗？？？

log4j.rootLogger=info, ServerDailyRollingFile, stdout 
log4j.appender.ServerDailyRollingFile=org.apache.log4j.DailyRollingFileAppender 
log4j.appender.ServerDailyRollingFile.DatePattern='.'yyyy-MM-dd 
log4j.appender.ServerDailyRollingFile.File=C://logs/notify-subscription.log 
log4j.appender.ServerDailyRollingFile.layout=org.apache.log4j.PatternLayout 
log4j.appender.ServerDailyRollingFile.layout.ConversionPattern=%d - %m%n 
log4j.appender.ServerDailyRollingFile.Append=true

log4j.appender.stdout=org.apache.log4j.ConsoleAppender 
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout 
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %p [%c] %m%n

package test;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

public class Test {

    public Test(){
        System.out.println("yes");
        System.out.println("我是");
        System.out.println("猪");
        System.out.println("我是猪");
    }
    static Logger logger=Logger.getLogger(Test.class);
    public static void main(String[] args) {
        //PropertyConfigurator.configure("log4j.properties");
          // Use the default configuration.
        //BasicConfigurator.configure();

        // 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.");
        Test test=new Test();
    }

}