我有以下方法：
private void passStingR(StringBuilder retVal) throws BadLocationException {
int scrollPositionR = scrollR.getVerticalScrollBar().getValue();//get value of scroll position stores in javas memory
windowR.remove(scrollR);
tableR.getModel();
modelR.setRowCount(0);
Document docR = null;
try {
docR = loadXMLFromString(retVal.toString());//pull in the XML data into a new doc
} catch (Exception ex) {
Logger.getLogger(remit.class.getName()).log(Level.SEVERE, null, ex);
}
populate1R(docR);
tableR.getTableHeader().setReorderingAllowed(false);//prevent user from changing column order now at refresh level
SimpleDateFormat time_formatterR = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String current_time_strR = time_formatterR.format(System.currentTimeMillis());
updatetFieldR.setText(current_time_strR);
scrollR.remove(tableR);
tableR = new JTable(modelR)
{
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
Font myFont = new Font("Arial",Font.PLAIN,10);
Font myFont1 = new Font("Arial", Font.BOLD,10);
if (!isRowSelected(row)) {
if (tableR.getColumnCount() >= 0) {
String type = (String) getModel().getValueAt(row, 11);
c.setBackground("0.0".equals(type) ? Color.RED : Color.WHITE);
c.setForeground("0.0".equals(type) ? Color.WHITE : Color.BLACK);
c.setFont("0.0".equals(type) ? myFont1: myFont);
}
}
return c;
};
};
TableColumn column = null;
for (int i = 0; i < 18; i++) {
column = tableR.getColumnModel().getColumn(i);
if (i == 0) {
column.setPreferredWidth(70); //sport column is bigger
}
if (i == 1) {
column.setPreferredWidth(500); //sport column is bigger
}
if (i == 7) {
column.setPreferredWidth(30); //sport column is bigger
}
if (i == 8) {
column.setPreferredWidth(20); //sport column is bigger
}
if (i == 9) {
column.setPreferredWidth(25); //sport column is bigger
}
if (i == 14) {
column.setPreferredWidth(500); //sport column is bigger
}
if (i == 15) {
column.setPreferredWidth(10); //sport column is bigger
}
if (i == 16) {
column.setPreferredWidth(20); //sport column is bigger
}
}
tableR.getTableHeader().setReorderingAllowed(false);//prevent the user from sorting the columns at intialise GUI stage even though the user cannnot change this
RowSorter<TableModel> sorter = new TableRowSorter<>(modelR);//creating a new sorter here from my modelR
tableR.setRowSorter(sorter);//set the sorter positon
scrollR = new JScrollPane(tableR);
windowR.add(scrollR);
windowR.validate();
scrollR.getVerticalScrollBar().setValue(scrollPositionR);
}
然后我在上面的代码中创建了一个分类器，如下面的
RowSorter<TableModel> sorter = new TableRowSorter<>(modelR);//creating a new sorter here from my modelR
tableR.setRowSorter(sorter);//set the sorter positon
这允许我对特定列进行排序并对列进行排序。 然而，一旦刷新，分拣机就会重置： 刷新过程是：
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
String stringfromDateR = tffromDateR.getText();
String stringtoDateR = tftoDateR.getText();
if(source == buttonR){
if(timerR != null) {
System.out.print("cancel");
timerR.cancel();
}
// System.out.print("cancel1bbbbb");
timerR = new Timer();
//auto refresh begins
int delayR = 0; //0 seconds startup delay
int periodR = 7000; //x seconds between refreshes
timerR.scheduleAtFixedRate(new TimerTask()
{
public void run() {
try {
getdataR(stringfromDateR,stringtoDateR);
} catch (IOException | BadLocationException ex) {
Logger.getLogger(JavaApplication63.class.getName()).log(Level.SEVERE, null, ex);
}
}
}, delayR, periodR);
}
if(source == buttonR1){
if(timerR != null) {
timerR.cancel();
}
modelR.setRowCount(0);
}
}
然后
private void getdataR(String stringfromDateR,String stringtoDateR) throws IOException, BadLocationException {
StringBuilder retVal = new StringBuilder();
URL oracle = new URL("XXXXXXXXXXXXXXXXXXXXX" );
BufferedReader in = new BufferedReader(new InputStreamReader(oracle.openStream()));
String newLine = "\n";
String inputLine;
while ((inputLine = in.readLine()) != null) {
System.out.println(inputLine);
retVal.append(inputLine).append(newLine);
}
in.close();
passStingR(retVal);
}
如何在刷新完成后让分拣机保留。我不确定是否设置
modelR.setRowCount(0);
导致分拣机失去分拣机位置。
我确实尝试过获取sortkeys，但这不起作用，我也进行了实验 在刷新之前发生了
RowSorter<? extends TableModel> tablesorterpos = tableR.getRowSorter();
然后应用
tableR.setRowSorter(tablesorterpos);
但这没有用
这就是我试过的
private void passStingR(StringBuilder retVal) throws BadLocationException {
RowSorter<TableModel> sorter = new TableRowSorter<>(modelR);//creating a new sorter here from my modelR
List<? extends SortKey> sorterR = sorter.getSortKeys();
int scrollPositionR = scrollR.getVerticalScrollBar().getValue();//get value of scroll position stores in javas memory
windowR.remove(scrollR);
tableR.getModel();
modelR.setRowCount(0);
Document docR = null;
try {
docR = loadXMLFromString(retVal.toString());//pull in the XML data into a new doc
} catch (Exception ex) {
Logger.getLogger(remit.class.getName()).log(Level.SEVERE, null, ex);
}
populate1R(docR);
tableR.getTableHeader().setReorderingAllowed(false);//prevent user from changing column order now at refresh level
SimpleDateFormat time_formatterR = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String current_time_strR = time_formatterR.format(System.currentTimeMillis());
updatetFieldR.setText(current_time_strR);
scrollR.remove(tableR);
tableR = new JTable(modelR)
{
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
Font myFont = new Font("Arial",Font.PLAIN,10);
Font myFont1 = new Font("Arial", Font.BOLD,10);
if (!isRowSelected(row)) {
if (tableR.getColumnCount() >= 0) {
String type = (String) getModel().getValueAt(row, 11);
c.setBackground("0.0".equals(type) ? Color.RED : Color.WHITE);
c.setForeground("0.0".equals(type) ? Color.WHITE : Color.BLACK);
c.setFont("0.0".equals(type) ? myFont1: myFont);
}
}
return c;
};
};
TableColumn column = null;
for (int i = 0; i < 18; i++) {
column = tableR.getColumnModel().getColumn(i);
if (i == 0) {
column.setPreferredWidth(70); //sport column is bigger
}
if (i == 1) {
column.setPreferredWidth(500); //sport column is bigger
}
if (i == 7) {
column.setPreferredWidth(30); //sport column is bigger
}
if (i == 8) {
column.setPreferredWidth(20); //sport column is bigger
}
if (i == 9) {
column.setPreferredWidth(25); //sport column is bigger
}
if (i == 14) {
column.setPreferredWidth(500); //sport column is bigger
}
if (i == 15) {
column.setPreferredWidth(10); //sport column is bigger
}
if (i == 16) {
column.setPreferredWidth(20); //sport column is bigger
}
}
tableR.getTableHeader().setReorderingAllowed(false);//prevent the user from sorting the columns at intialise GUI stage even though the user cannnot change this
sorter.setSortKeys(sorterR);
tableR.setRowSorter(sorter);//set the sorter positon
scrollR = new JScrollPane(tableR);
windowR.add(scrollR);
windowR.validate();
scrollR.getVerticalScrollBar().setValue(scrollPositionR);
}
我收到此错误：
at javax.swing.DefaultRowSorter.rowsDeleted(DefaultRowSorter.java:880)
at javax.swing.JTable.notifySorter(JTable.java:4276)
at javax.swing.JTable.sortedTableChanged(JTable.java:4120)
at javax.swing.JTable.tableChanged(JTable.java:4397)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:296)
at javax.swing.table.AbstractTableModel.fireTableRowsDeleted(AbstractTableModel.java:261)
at javax.swing.table.DefaultTableModel.setNumRows(DefaultTableModel.java:321)
at javax.swing.table.DefaultTableModel.setRowCount(DefaultTableModel.java:339)
at javaapplication63.remit.passStingR(remit.java:238)
at javaapplication63.remit.getdataR(remit.java:227)
at javaapplication63.remit.access$000(remit.java:60)
at javaapplication63.remit$1.run(remit.java:187)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)
答案 0 :(得分：2)
您可以从DefaultRowSorter获取当前排序键。所以基本的逻辑是：
编辑：
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import javax.swing.*;
import javax.swing.table.*;
public class TableSortSSCCE extends JPanel
{
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data =
{
{"Kathy", "Smith", "Snowboarding", new Integer(5), new Boolean(false)},
{"John", "Doe", "Rowing", new Integer(3), new Boolean(true)},
{"Sue", "Black", "Knitting", new Integer(2), new Boolean(false)},
{"Jane", "White", "Speed reading", new Integer(20), new Boolean(true)},
{"Joe", "Brown", "Pool", new Integer(10), new Boolean(false)}
};
private JTable table;
public TableSortSSCCE()
{
super(new BorderLayout());
DefaultTableModel model = new DefaultTableModel(data, columnNames);
table = new JTable(model);
table.setPreferredScrollableViewportSize( table.getPreferredSize() );
table.setAutoCreateRowSorter(true);
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane, BorderLayout.CENTER);
JButton clear = new JButton("Clear Table");
clear.addActionListener( new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
DefaultTableModel model = (DefaultTableModel)table.getModel();
model.setRowCount(0);
}
});
add(clear, BorderLayout.NORTH);
JButton reload = new JButton("Reload Table");
reload.addActionListener( new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
TableRowSorter sorter = (TableRowSorter)table.getRowSorter();
List<? extends RowSorter.SortKey> sortKeys = sorter.getSortKeys();
DefaultTableModel model = new DefaultTableModel(data, columnNames);
table.setModel(model);
table.setAutoCreateRowSorter( true );
sorter = (TableRowSorter)table.getRowSorter();
sorter.setSortKeys( sortKeys );
}
});
add(reload, BorderLayout.SOUTH);
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("TableSortSSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TableSortSSCCE newContentPane = new TableSortSSCCE();
frame.setContentPane(newContentPane);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args)
{
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}