在swing中log4j重定向到桌面应用程序

最简单的选择是在初始化GUI后以编程方式添加appender。像这样:

Logger.getRootLogger().addAppender(yourTextAreaAppender);

编辑:要仅记录信息级别,请执行以下操作:

yourTextAreaAppender.addFilter(new Filter() {
    @Override
    public int decide(LoggingEvent event) {
        if (event.getLevel().equals(Level.INFO)) {
            return ACCEPT;
        } else {
            return DENY;
        }
    }
});

1. 在log4j.property文件中指定属性,在我的示例中是:

   log4j.rootLogger=S
   log4j.appender.S=com.ibm.nzna.projects.qit.gui.StatusMessageAppender
   log4j.appender.S.layout=org.apache.log4j.PatternLayout
   log4j.appender.S.layout.ConversionPattern=%m
   

2. Write是一个新类,具有以下代码:

   import org.apache.log4j.AppenderSkeleton;
   import org.apache.log4j.Level;
   import org.apache.log4j.spi.LoggingEvent;
   
   /**
    * @author Ashish Tyagi
    *
    */
   public class StatusMessageAppender extends AppenderSkeleton {
       private StatusBar statusBar = AppDefaultWin.getStatusBar();
       protected void append(LoggingEvent event) {
           if(event.getLevel().equals(Level.INFO)){
                   //here set the text of your swing component;
                  //in my case it is: statusBar.st_STATUS.setText(event.getMessage().toString());
           }
       }
   
       public void close() {
   
       }
       public boolean requiresLayout() {
           return false;
       }
   
   }