朋友们,我正在开发一个Java应用程序,用于性能监控。其中一个类中获取数值并在另一个类中绘制图形。我希望使用SwingWorker来交替执行这两个类。
ResultSet rs;
Connection conn = null;
conn = (Connection)getMySqlConnection();
Statement st = conn.createStatement();
rs = st.executeQuery("SHOW GLOBAL STATUS");
while(rs.next())
{
Map_MySql.put(rs.getString(1), rs.getString(2));
}
conn.close();
上面的类用于收集服务器状态并将其存储在哈希映射中。这个类被称为"MySQLClass"。
System.out.println("Graph Occur");
XYDataset Dataset;
TimeSeries Series = new TimeSeries("Random Data");
Second sec = new Second();
ChartPanel CPanel;
if(Operation_Combo.getSelectedItem().toString() == "MySQL")
{
if(MySQLClass.Map_MySql.get(""+MainWindow.SelectedNode+"") == null)
{
Value = 0;
}
else
{
Value = Integer.parseInt(MySQLClass.Map_MySql.get(""+MainWindow.SelectedNode+""));
}
System.out.println(Value);
}
if(Operation_Combo.getSelectedItem().toString() == "SQL Server")
{
if(SqlServerClass.Map_SQLServer.get(""+MainWindow.SelectedNode+"") == null)
{
Value = 0;
}
else
{
Value = Integer.parseInt(SqlServerClass.Map_SQLServer.get(""+MainWindow.SelectedNode+""));
}
System.out.println(Value);
}
String CounterName = MainWindow.SelectedNode.toString();
Series.add(sec, Value);
Dataset = new TimeSeriesCollection(Series);
Chart = ChartFactory.createTimeSeriesChart(CounterName, "Time", "Range", Dataset, true, false, false);
XYPlot Plot = (XYPlot)Chart.getPlot();
Plot.setBackgroundPaint(Color.LIGHT_GRAY);
Plot.setDomainGridlinePaint(Color.WHITE);
Plot.setRangeGridlinePaint(Color.RED);
CPanel = new ChartPanel(Chart);
Panel1.revalidate();
Panel1.add(CPanel);
System.out.println("Chart Added");
Panel1.validate();
Panel1.repaint();
Thread.sleep((int)MainWindow.Interval_Combo.getSelectedItem() * 1000);
System.out.println("Sleep="+((int)MainWindow.Interval_Combo.getSelectedItem() * 1000));
System.gc();
以下是绘制名为“Graph”的类的代码。 如果您知道如何使用Swing Worker来执行此操作并在每次迭代中绘制图形,请帮助我。
请注意,本文不会解释任何技术内容。
SwingWorker
的部分。 - Paul Samsotha