使用大量行填充JTable

我想在运行时期间用很多行填充JTable（比方说10000）。 但我所有的尝试都非常糟糕且效率低下。

起点是addData方法，它获取表示行的对象列表。 我试图通过SwingWorker填充表格，但这仅适用于我的小数据。

另一种尝试是直接设置数据而不使用任何类型的线程，但这也非常慢，至少UI不像SwingWorker那样被阻止。

那你怎么做这个一般？ 表应该逐行或逐行填充，但不能全部填充，垂直滚动条应同时滚动。

我的TableModel：

 public class MyTableModel extends AbstractTableModel { /** * */ private static final long serialVersionUID = 1L; String[] columnNames; public Map data = new LinkedHashMap(); public MyTableModel(String[] header) { columnNames = header; } public String getColumnName(int col) { return columnNames[col].toString(); } @Override public int getColumnCount() { return columnNames.length; } @Override public int getRowCount() { return data.size(); } @Override public Object getValueAt(int row, int col) { . . return value; } public void addRow(long id, MyDataObject o) { data.put(id, m); fireTableRowsInserted(0,nqm_messages.size()-1); } } 

SwingWorker实现：

 class TableSwingWorker extends SwingWorker { private final MyTableModel tableModel; List messages; public TableSwingWorker(MyTableModel tableModel, List dataList) { this.tableModel = tableModel; this.messages = new LinkedList(mm); } @Override protected MyTableModel doInBackground() throws Exception { for(MyDataObject s : messages) { publish(s); } return tableModel; } @Override protected void process(List chunks) { for(MyDataObject row : chunks){ Long l = Long.parseLong(row.getId()); tableModel.addRow(l, row); } } } 

将对象添加到JTable：

 public void addData(List o) { MyTableModel m = (MyTableModel)table.getModel(); (new TableSwingWorker(m,o)).execute(); //for(int i=0; i < mm.size();i++) { // long l = Long.parseLong(mm.get(i).getId()); // m.addRow(l, mm.get(i)); //} } 

Answer 1

因此，从评论中发现了许多事情……

• 您需要正确触发插入行的方法，仅指示已添加的行以及已更新的位置。 这非常重要，因为该表已针对速度进行了优化
• 您应该为表模型提供批量添加方法，以便您可以在单个或尽可能少的步骤中更轻松地添加多个行
• 您应该让SwingWorker定期睡眠或屈服，以便有时间发布结果。

所以，在这个例子中，我添加了1,000,000行。 在我的测试中，它花了不到一秒钟……

 import java.awt.BorderLayout; import java.awt.Component; import java.awt.EventQueue; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Date; import java.util.List; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingWorker; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.table.AbstractTableModel; import javax.swing.table.DefaultTableCellRenderer; public class TestTableLoad01 { public static void main(String[] args) { new TestTableLoad01(); } public TestTableLoad01() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { } MyTableModel model = new MyTableModel(); JTable table = new JTable(model); table.setDefaultRenderer(Date.class, new TimeCellRenderer()); JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(new JScrollPane(table)); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); TableSwingWorker worker = new TableSwingWorker(model); worker.execute(); } }); } public class TimeCellRenderer extends DefaultTableCellRenderer { private DateFormat df; public TimeCellRenderer() { df = new SimpleDateFormat("HH:mm:ss"); } @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { if (value instanceof Date) { value = df.format(value); } super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column); return this; } } public class MyTableModel extends AbstractTableModel { private String[] columnNames = new String[]{"Date", "Row"}; private List data; public MyTableModel() { data = new ArrayList<>(25); } @Override public Class getColumnClass(int columnIndex) { return columnIndex == 0 ? Date.class : Integer.class; } @Override public String getColumnName(int col) { return columnNames[col]; } @Override public int getColumnCount() { return columnNames.length; } @Override public int getRowCount() { return data.size(); } @Override public Object getValueAt(int row, int col) { RowData value = data.get(row); return col == 0 ? value.getDate() : value.getRow(); } public void addRow(RowData value) { int rowCount = getRowCount(); data.add(value); fireTableRowsInserted(rowCount, rowCount); } public void addRows(RowData... value) { addRows(Arrays.asList(value)); } private void addRows(List rows) { int rowCount = getRowCount(); data.addAll(rows); fireTableRowsInserted(rowCount, getRowCount() - 1); } } public class RowData { private Date date; private int row; public RowData(int row) { this.date = new Date(); this.row = row; } public Date getDate() { return date; } public int getRow() { return row; } } public class TableSwingWorker extends SwingWorker { private final MyTableModel tableModel; public TableSwingWorker(MyTableModel tableModel) { this.tableModel = tableModel; } @Override protected MyTableModel doInBackground() throws Exception { // This is a deliberate pause to allow the UI time to render Thread.sleep(2000); System.out.println("Start polulating"); for (int index = 0; index < 1000000; index++) { RowData data = new RowData(index); publish(data); Thread.yield(); } return tableModel; } @Override protected void process(List chunks) { System.out.println("Adding " + chunks.size() + " rows"); tableModel.addRows(chunks); } } }