编辑jtable的用户信息

Question

我有一个jtable，显示一个文本文件包含在自己的。 文本文件中的每一行都是用户记录。 我添加一个编辑按钮来编辑表格上的每个选定的行。 我用这个代码，但我不知道如何做到这一点：

public class AllUser extends AbstractTableModel { 

UserInformation uiS = new UserInformation(); 
String[] col = {"ID", "Fname", "Lname", "Gender", "Date"}; 
List<UserInformation> Udata = new ArrayList<UserInformation>(); 

public AllUser() { 
BufferedReader br = null; 
    try { 
     FileReader fr = new FileReader("xxx.txt"); 
     br = new BufferedReader(fr); 
     String line; 
     while ((line = br.readLine()) != null) { 
      if (line.trim().length() == 0) { 
       continue; 
      } 
      Udata.add(initializeUserInfos(line)); 
     } 
    } catch (IOException e) { 
    } finally { 
     if (br != null) { 
      try { 
       br.close(); 
      } catch (IOException ioe) { 
      } 
     } 
    } 
} 

private UserInformation initializeUserInfos(String str) { 
    UserInformation Uinit = new UserInformation(); 
    String[] CellArray = str.split("  "); 
    Uinit.setID(CellArray[0]); 
    Uinit.setFname(CellArray[1]); 
    Uinit.setLname(CellArray[2]); 
    Uinit.setGender(CellArray[3]); 
    Uinit.setDate(CellArray[4]); 
    return Uinit; 
} 
@Override 
public String getColumnName(int colu) { 
    return col[colu]; 
} 

@Override 
public int getRowCount() { 
    return Udata.size(); 
} 

@Override 
public int getColumnCount() { 
    return col.length; 
} 

@Override 
public Object getValueAt(int rowIndex, int columnIndex) { 
    UserInformation uinfoS = Udata.get(rowIndex); 
    Object value = null; 
    switch (columnIndex) { 
     case 0: 
      value = uinfoS.getID(); 
      break; 
     case 1: 
      value = uinfoS.getFname(); 
      break; 
     case 2: 
      value = uinfoS.getLname(); 
      break; 
     case 3: 
      value = uinfoS.getGender(); 
      break; 
     case 4: 
      value = uinfoS.getDate(); 
      break; 
     default: 
      value = "..."; 
    } 
    return value; 
} 

@Override 
public void setValueAt(Object value, int rowIndex, int columnIndex) { 
    UserInformation userInfo = new UserInformation(); 

    switch (columnIndex) { 

     case 0: 
      userInfo.setID((String) value); 
      break; 
     case 1: 
      userInfo.setFname((String) value); 
      break; 
     case 2: 
      userInfo.setLname((String) value); 
      break; 
     case 3: 
      userInfo.setGender((String) value); 
      break; 
     case 4: 
      userInfo.setDate((String) value); 
      break; 
    } 

} 

public Object getSelectedMember(int row){ 
    UserInformation userInf=new UserInformation(); 

    Object fname=userInf.getFname(); 
    Object lname=userInf.getLname(); 
    Object gender=userInf.getGender(); 
    Object date=userInf.getDate(); 
    return // ? 

} 
} 

我补充这getSelectedMember(int row)方法要做到这一点，但不正确的！

public class UserPage extends JFrame implements ActionListener { 

private AllUser userModel; 
private JTable uTable; 
private JButton editButton; 

public UserPage() { 
    userModel = new AllUser(); 
    uTable = new JTable(userModel); 
    add(new JScrollPane(uTable), BorderLayout.CENTER); 
    add(buttonPanels(), BorderLayout.PAGE_START); 
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    this.setSize(800, 600); 
} 
public final JPanel buttonPanels() { 
    JPanel buttonsPanel = new JPanel(new FlowLayout(FlowLayout.LEFT)); 
    editButton=new JButton("Edit"); 
    editButton.addActionListener(this); 
    buttonsPanel.add(editButton); 
    return buttonsPanel; 
} 
@Override 
public void actionPerformed(ActionEvent e) { 
     if(e.getSource()== editButton){ 
     int selectedRow=uTable.getSelectedRow(); 
     if(selectedRow>0){ 
      editUser(selectedRow); 
     } 
     else{ 
      JOptionPane.showMessageDialog(null, "Select a user"); 
     } 

    } 
} 
    public void editUser(int row){ 
    userModel.getSelectedMember(row); 
    new NewUserFrame_Edit().setVisible(true); 
} 
} 

UserInformation类别：

public class UserInformation { 

private String Fname; 
private String Lname; 
private String ID; 
private String Gender; 
private String Date; 

public String getFname() { 
    return Fname; 
} 

public void setFname(String fname) { 
    this.Fname = fname; 
} 

public String getLname() { 
    return Lname; 
} 

public void setLname(String lname) { 
    this.Lname = lname; 
} 

public String getID() { 
    return ID; 
} 

public void setID(String i_d) { 
    this.ID = i_d; 
} 

public String getGender() { 
    return Gender; 
} 

public void setGender(String gndr) { 
    this.Gender = gndr; 
} 

public String getDate() { 
    return Date; 
} 

public void setDate(String date) { 
    this.Date = date; 
} 

@Override 
public String toString() { 
    return ID + "  " + Fname + "  " 
      + Lname + "  " + Gender + "  " + Date + "\n"; 
} 
} 

对不起长码。

Answer 1

在表中创建一个额外的列并用Edit填充单元格值。然后使用合适的TableCellRenderer呈现Edit单元格。将表格添加MouseListener。获取表格上单击的单元格的row和column号码。如果单击的单元格包含值Edit，则检索该行每列的值，并将其显示在包含JTextFields的面板中。使用JOptionpane或JDialog显示该面板。以下是实现此任务的简短代码演示：

import java.awt.BorderLayout; 
import java.awt.GridLayout; 
import java.awt.Component; 
import java.awt.Color; 
import java.awt.Point; 
import java.awt.event.MouseListener; 
import java.awt.event.MouseEvent; 
import java.awt.event.MouseAdapter; 
import java.awt.Cursor; 
import javax.swing.BorderFactory; 
import javax.swing.border.BevelBorder; 
import javax.swing.JFrame; 
import javax.swing.JTable; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 
import javax.swing.JButton; 
import javax.swing.JScrollPane; 
import javax.swing.JOptionPane; 
import javax.swing.JLabel; 
import javax.swing.SwingUtilities; 
import javax.swing.event.TableModelListener; 
import javax.swing.event.TableModelEvent; 
import javax.swing.table.TableModel; 
import javax.swing.table.AbstractTableModel; 
import javax.swing.table.TableColumn; 
import javax.swing.table.DefaultTableCellRenderer; 
class TableRowEdit extends JFrame 
{ 
    private JTable table; 
    private JScrollPane jsPane; 
    private TableModel myModel; 
    private JPanel dialogPanel; 
    private JTextField tf[]; 
    private JLabel  lbl[]; 
    public void prepareAndShowGUI() 
    { 
     myModel = new MyModel(); 
     table = new JTable(myModel); 
     jsPane = new JScrollPane(table); 
     table.getColumnModel().getColumn(2).setCellRenderer(new LabelCellRenderer()); 
     table.addMouseListener(new MyMouseAdapter()); 
     getContentPane().add(jsPane); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     prepareDialogPanel(); 
     pack(); 
     setVisible(true); 

    } 
    private void prepareDialogPanel() 
    { 
     dialogPanel = new JPanel(); 
     int col = table.getColumnCount() - 1; 
     dialogPanel.setLayout(new GridLayout(col,2)); 
     tf = new JTextField[col]; 
     lbl = new JLabel[col]; 
     for (int i = 0; i < col; i++) 
     { 
      lbl[i] = new JLabel(table.getColumnName(i)); 
      tf[i] = new JTextField(10); 
      dialogPanel.add(lbl[i]); 
      dialogPanel.add(tf[i]); 
     } 
    } 
    private void populateTextField(String[] s) 
    { 
     for (int i = 0 ; i < s.length ; i++) 
     { 
      tf[i].setText(s[i]); 
     } 
    } 
    public class LabelCellRenderer extends DefaultTableCellRenderer 
    { 
     public Component getTableCellRendererComponent(JTable table,Object oValue, boolean isSelected, boolean hasFocus, int row, int column) 
     { 
      Component c = super.getTableCellRendererComponent(table, oValue,isSelected, hasFocus,row, column); 
      String value = (String)oValue; 
      JLabel label =(JLabel)c; 
      label.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED)); 
      label.setBackground(Color.lightGray); 
      label.setHorizontalTextPosition(SwingUtilities.CENTER); 
      label.setHorizontalAlignment(SwingUtilities.CENTER); 
      label.setText(value); 
      return label; 
     } 
    } 

    private class MyMouseAdapter extends MouseAdapter 
    { 
     @Override 
     public void mousePressed(MouseEvent evt) 
     { 
      int x = evt.getX(); 
      int y = evt.getY(); 
      int row = table.rowAtPoint(new Point(x,y)); 
      int col = table.columnAtPoint(new Point(x,y)); 
      if (col == 2) 
      { 
       String arr[] = new String[table.getColumnCount() - 1]; 
       for (int i = 0 ; i < arr.length ; i++) 
       { 
        arr[i] = (String)table.getValueAt(row,i); 
       } 
       populateTextField(arr); 
       JOptionPane.showMessageDialog(TableRowEdit.this,dialogPanel,"Information",JOptionPane.INFORMATION_MESSAGE); 
       //Write here the code to save changed values to file and update to JTable also. 
      } 
     } 
    } 
    private class MyModel extends AbstractTableModel 
    { 
     String[] columns = { 
          "Roll No.", 
          "Name", 
          "Action" 
          }; 
     String[][] inData = { 
           {"1","Huge Jackman","Edit"}, 
           {"2","Thomas Andrews","Edit"}, 
           {"3","Shiney","Edit"} 
          }; 
     @Override 
     public void setValueAt(Object value, int row, int col) 
     { 
      inData[row][col] = (String)value; 
     } 
     @Override 
     public Object getValueAt(int row, int col) 
     { 
      return inData[row][col]; 
     } 
     @Override 
     public int getColumnCount() 
     { 
      return columns.length; 
     } 
     @Override 
     public int getRowCount() 
     { 
      return inData.length; 
     } 
     @Override 
     public String getColumnName(int col) 
     { 
      return columns[col]; 
     } 
    } 
    public static void main(String st[]) 
    { 
     SwingUtilities.invokeLater(new Runnable() 
     { 
      @Override 
      public void run() 
      { 
       TableRowEdit td = new TableRowEdit(); 
       td.prepareAndShowGUI(); 
      } 
     }); 
    } 
} 

Answer 2

它前人的精力是这样的：当用户点击JTable中的一行，并点击一个新页面应该打开，然后将每个旧的数据应该在自己的textfiled

1. 插入的MouseListener添加到表。

2. 双击创建一个包含编辑数据所需的文本字段的JDialog。

3. 然后，您使用getValueAt（...）方法从表中获取数据。

4. 然后用户在文本字段中编辑数据。

5. 当用户单击对话框上的“保存”按钮时，将从每个文本字段获取数据并使用setValueAt（...）方法更新表。

6. 如果要将数据保存在文本文件中，则需要通过写出表中的所有数据来重新创建enitre文件。