定时执行sql生成图片保存到一个指定的目录上，动态传入时间参数

定时执行sql生成图片保存到一个指定的目录下，动态传入时间参数
需要一个动态从oracle数据库读取sql，sql放在xml文件中，现在生成图片的已经实现了，怎么才能定时启动这个，把图片的读取的是这个时间的5天前的数据
public class ImageGeneratorUtil{  
private final static Logger log = Logger.getLogger(ImageGeneratorUtil.class);
  private static final long serialVersionUID = -3938318741402322164L;  
  private static BufferedImage image;
  
  public static BufferedImage genaralImage(String columnamessql, String columsql) {  
  try {  
  String columnNames[] =ImageDataUtil.dataColumnames(columnamessql);
  String[][] rowData =ImageDataUtil.dataColum(columsql);
   
  DefaultTableModel model = new DefaultTableModel(rowData, columnNames) {  
  
  public boolean isCellEditable(int row, int column) {  
  return false;  
  }  
  };  
  DefaultTableCellRenderer tcr = new DefaultTableCellRenderer() {  
  public Component getTableCellRendererComponent(JTable table,  
  Object value, boolean isSelected, boolean hasFocus,  
  int row, int column) {  
  if(row == 2 || row == 8)
  {
  setBackground(Color.gray);  
  setHorizontalAlignment(JLabel.CENTER);
  }
  else if (value != null && value.toString().trim().length() != 0 && column != 0) {  
  //setBackground(Color.red);
  setHorizontalAlignment(JLabel.RIGHT);
  } else {  
  setBackground(Color.white);  
  setHorizontalAlignment(JLabel.LEFT);
  } 
   
  return super.getTableCellRendererComponent(table, value,  
  isSelected, hasFocus, row, column);  
  }  
  };
   
   
  //Jtable大小
  int table_width = 400;  
  int table_hight = 380; 
  //图片生成后再压缩后大小
  int image_width = 480; 
  int image_hight = 480; 
   
  JTable table = new JTable(model);  
  table.setPreferredSize(new Dimension(table_width, table_hight));  
  //设置列表现器------------------------//  
  for (int i = 0; i < columnNames.length; i++) {  
  table.getColumn(columnNames[i]).setCellRenderer(tcr);  
  }  
  int width = 180;  
  table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);  
  
  TableColumn firsetColumn = table.getColumnModel().getColumn(0);  
  firsetColumn.setPreferredWidth(width);  
  firsetColumn.setMinWidth(width);  
  firsetColumn.setMinWidth(width); 
  JFrame f = new JFrame();  
  JScrollPane scrollPane = new JScrollPane(table);
  scrollPane.setAutoscrolls(false);  
  f.getContentPane().add(scrollPane);  
  f.setSize(table_width, table_hight);