public TabPane() {
        super(JTabbedPane.NORTH);
        datePane = new DatePane();
        graphPane = new GraphPane();
        exceptionPane = new ExceptionPane();
        this.add("总流量", datePane);
        this.add("统计图", graphPane);
        this.add("异常日志",exceptionPane);
        this.addChangeListener(new ChangeListener() {
            public void stateChanged(ChangeEvent e) {
            }
        });
    }