刪除多個單元格中的值

在Excel中，可以刪除多個選定單元格的值，我如何通過JTable實現這一點？刪除多個單元格中的值

在此示例代碼中，只有一個單元格的值被刪除。

多個小區中選擇

enter image description here

只有一個在一個單元格的值被刪除，也刪除按鈕被按下，我不想因爲這是後進入編輯模式不在Excel中這樣做。

enter image description here

SSCCE

import java.awt.BorderLayout; 
import java.awt.Component; 
import java.awt.EventQueue; 
import java.awt.event.KeyEvent; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.border.EmptyBorder; 
import javax.swing.GroupLayout; 
import javax.swing.GroupLayout.Alignment; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.table.DefaultTableModel; 
import javax.swing.text.JTextComponent; 
import java.util.EventObject; 

public class table extends JFrame{ 


    private static final long serialVersionUID = 1L; 
    private JPanel contentPane; 
    private JTable table; 


    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       try { 
        table frame = new table(); 
        frame.setVisible(true); 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } 
      } 
     }); 
    } 


    public table() { 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setBounds(100, 100, 450, 300); 
     contentPane = new JPanel(); 
     contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
     setContentPane(contentPane); 

     JScrollPane scrollPane = new JScrollPane(); 
     GroupLayout gl_contentPane = new GroupLayout(contentPane); 
     gl_contentPane.setHorizontalGroup(
      gl_contentPane.createParallelGroup(Alignment.LEADING) 
       .addGroup(gl_contentPane.createSequentialGroup() 
        .addGap(2) 
        .addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 422, Short.MAX_VALUE)) 
     ); 
     gl_contentPane.setVerticalGroup(
      gl_contentPane.createParallelGroup(Alignment.LEADING) 
       .addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 252, Short.MAX_VALUE) 
     ); 

     table = new JTable(){ 
      /** 
      * 
      */ 
      private static final long serialVersionUID = 1L; 

      public boolean editCellAt(int row, int column, EventObject e){ 
       boolean result = super.editCellAt(row, column, e); 
       final Component editor = getEditorComponent(); 
       if (editor == null || !(editor instanceof JTextComponent)) { 
        return result; 
       } 
       if (e instanceof KeyEvent) { 
        ((JTextComponent)editor).selectAll(); 
       } 
       return result; 
      } 
     }; 
     table.setModel(new DefaultTableModel(
      new Object[][] { 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null}, 
       {null, null, null, null, null, null} 
      }, 
      new String[] { 
       "New column 1", "New column 2", "New column 3", "New column 4", "New column 5", "New column 6" 
      } 
     )); 
     table.setCellSelectionEnabled(true); 
     scrollPane.setViewportView(table); 
     new PegarExcel(table); 
     contentPane.setLayout(gl_contentPane); 
    } 
} 


//********************************************************************************************************* 
//Clase que se encarga del pegado 
//********************************************************************************************************* 

import java.awt.*; 
import java.awt.event.*; 

import javax.swing.*; 
import javax.swing.table.DefaultTableModel; 

import java.awt.datatransfer.*; 
import java.util.*; 
import java.io.IOException; 
//---------------------------------------------------------------------------------------------------------------------- 
public class PegarExcel implements ActionListener{ 
    private String rowstring,value; 
    private Clipboard system; 
    private StringSelection stringSelection,stsel; 
    private JTable jTable1 ; 
    //---------------------------------------------------------------------------------------------------------------------- 
    public PegarExcel(JTable myJTable) 
    { 
    jTable1 = myJTable; 

    KeyStroke paste = KeyStroke.getKeyStroke(KeyEvent.VK_V,ActionEvent.CTRL_MASK,false); 

    jTable1.registerKeyboardAction(this,"Paste",paste,JComponent.WHEN_FOCUSED); 

    system = Toolkit.getDefaultToolkit().getSystemClipboard(); 
    } 
    //---------------------------------------------------------------------------------------------------------------------- 
    public JTable getJTable() { 
     return jTable1; 
    } 
    //---------------------------------------------------------------------------------------------------------------------- 
    public void setJTable(JTable jTable1) { 
     this.jTable1=jTable1; 
    } 
    //---------------------------------------------------------------------------------------------------------------------- 
    void showErrorMessage(String msg){ 
     JOptionPane.showMessageDialog(null, msg,msg,JOptionPane.ERROR_MESSAGE); 
    } 
    //---------------------------------------------------------------------------------------------------------------------- 
    void pasteAction(){ 
     system = Toolkit.getDefaultToolkit().getSystemClipboard(); 

     try{ 
      String data= (String)system.getData(DataFlavor.stringFlavor); 
      if(data==null) { 
       showErrorMessage("No data on clipboard"); 
       return; 
      } 

      int selectCol=jTable1.getSelectedColumn(); 
      int selectRow=jTable1.getSelectedRow(); 
      if(selectCol<0||selectRow<0) { 
       showErrorMessage("Please Select cell"); 
       return; 
      } 
      //devuelve clipboard contenido 

    StringTokenizer st,stTmp; 
    st=new StringTokenizer(data,"\n"); 
    int pasteRows=st.countTokens(); 
    st=new StringTokenizer(st.nextToken().trim(),"\t"); 
    int pasteCols=st.countTokens(); 
    int marginCols=jTable1.getColumnCount()-selectCol; 
    int marginRows=jTable1.getRowCount()-selectRow; 
    //revisa espacio disponible 
    if(marginCols<pasteCols || marginRows<pasteRows){ 
     //showErrorMessage("La tabla no posee el espacio suficiente para pegar los datos"); 
     //return; 
    } 

    st=new StringTokenizer (data,"\n"); 
    int rowCount=0,colCount; 
    //copia a la tabla 
    while(st.hasMoreTokens()){ 
     stTmp=new StringTokenizer (st.nextToken(),"\t"); 
     colCount=0; 

     DefaultTableModel model = (DefaultTableModel) jTable1.getModel(); 
     System.out.println("model.getRowCount():"+model.getRowCount()); 
     System.out.println("rowCount+selectRow:"+(rowCount+selectRow)); 
     System.out.println("pasteRows:"+(pasteRows)); 
     System.out.println("marginRows:"+(marginRows)); 
     System.out.println("rowCount:"+rowCount); 

     if(rowCount+selectRow>model.getRowCount()-1){ 

      if(0==model.getRowCount()) 
       model.addRow(new Object[]{"","","",1,"MB",10000, true,true,"","",""}); 
      else 
       model.addRow(new Object[]{model.getValueAt(model.getRowCount()-1, 0),"","",1,"MB", 10000, true,true,"","",""}); 
     } 

     while(stTmp.hasMoreTokens()){ 
      String columnClassName =jTable1.getColumnClass(colCount+selectCol).getName(); 
      if("java.lang.String"==columnClassName) 
       jTable1.setValueAt(stTmp.nextToken(),rowCount+selectRow,colCount+selectCol); 
      else if("java.lang.Integer"==columnClassName) 
       jTable1.setValueAt(Integer.parseInt(stTmp.nextToken()),rowCount+selectRow,colCount+selectCol); 
      else if("java.lang.Boolean"==columnClassName){ 
       boolean bool = Boolean.parseBoolean(stTmp.nextToken()); 
       jTable1.setValueAt(bool,rowCount+selectRow,colCount+selectCol); 
      } 
      else 
       jTable1.setValueAt(stTmp.nextToken(),rowCount+selectRow,colCount+selectCol); 

      System.out.println("columnClassName: "+columnClassName); 
      //jTable1.setValueAt(stTmp.nextToken(),rowCount+selectRow,colCount+selectCol); 
      colCount++; 
     } 


     rowCount++; 
     } 
    } 

    catch(UnsupportedFlavorException uf){ 
     System.out.println ("uf="+uf.getMessage()); 
    } 
    catch(IOException io){ 
     System.out.println ("io="+io.getMessage()); 
    } 

    } 
    //---------------------------------------------------------------------------------------------------------------------- 
    public void actionPerformed(ActionEvent e){ 
     if(e.getActionCommand().compareTo ("Paste")==0){ 
      pasteAction(); 
     return; 
     } 

    } 
}

來源

2013-12-16 user955732

如果我理解你正確萬阿英，蔣達清，你需要附加一個適當的鍵綁定來處理你的要求......

例如，

InputMap im = table.getInputMap(); 
ActionMap am = table.getActionMap(); 

im.put(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0), "delete"); 
am.put("delete", new AbstractAction() { 

    @Override 
    public void actionPerformed(ActionEvent e) { 

     System.out.println("DeleteMe..."); 

    } 
});

看看How to use Key Bindings

表進入「編輯器」模式的原因可能涉及默認編輯器的設置方式。他們正在接受刪除爲編輯模式

來源

2013-12-16 00:38:01 MadProgrammer

任何有興趣的引發劑，

我也跟着MadProgrammer的建議，並將此代碼PegarExcel.java（第31行），它似乎已經解決了這個問題：）

InputMap im = jTable1.getInputMap(); 
    ActionMap am = jTable1.getActionMap(); 

    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0), "delete"); 
    am.put("delete", new AbstractAction() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       int[] columns = jTable1.getSelectedColumns(); 
       int[] rows = jTable1.getSelectedRows(); 
       for(int row:rows){ 
        for(int column:columns){ 
         jTable1.setValueAt(null,row,column); 
        } 
       } 

      } 
    });

來源

2013-12-16 00:52:40 user955732

看起來您一直在使用視圖座標，但是您可能會交換兩列或排列要檢查的行。 – trashgod

刪除多個單元格中的值

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