第5天：用IntegerEditor extends DefaultCellEditor來解決JTable的某一列數字控制

原創

2020-02-20 20:22

/**
* 用來JTable控制輸入數字判斷
*/

import java.awt.Component;

import javax.swing.DefaultCellEditor;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;

import com.sa.fb.pos.utils.DialogUtil;

public class IntegerEditor extends DefaultCellEditor {

   private static final long serialVersionUID = -3781656457614462617L;
   private String oldText;
   public IntegerEditor() {
       super(new JTextField());
       //field.setBorder(BorderFactory.createLineBorder(Color.black));
   }

   public Object getCellEditorValue() {
       String value = (String) delegate.getCellEditorValue();
       if (value != null && value.trim().length() > 0) {
           try {
               Integer.parseInt(value);
           } catch (Throwable t) {
               //JOptionPane.showMessageDialog(null, "請輸入實數值! ");
               DialogUtil.alert("請輸入實數值! ");
               return oldText;
           }
       }
       return value;
   }

   public Component getTableCellEditorComponent(JTable table, Object value,
           boolean isSelected, int row, int col) {
           oldText = value.toString();
       return super.getTableCellEditorComponent(table, value, isSelected, row,
               col);
   }
   public static void main(String[] arg){
       String[][] data={};
       String[] columnNames={};
       TableModel model = new ReportTableModel(data, columnNames);
       tableColumn = new JTable(model);

       tableColumn.setCellSelectionEnabled(true);
       tableColumn.getTableHeader().setReorderingAllowed(false);//不允許列重新排序
       tableColumn.setRowHeight(23); // 設置表格的行高度

       TableColumnModel TCM=tableColumn.getColumnModel();

       TCM.getColumn(3).setCellEditor(new IntegerEditor());
       TCM.getColumn(4).setCellEditor(new IntegerEditor());
   }
}

import javax.swing.table.AbstractTableModel;
/***
* 功能：處理JTable,包括現實列表，對列表改動等
* @author
*
*/
public class ReportTableModel extends AbstractTableModel {
   /**
   *
   */
   private static final long serialVersionUID = 1L;
   Object[][] data;
   Object[] columnNames;

   ReportTableModel(Object[][] data, Object[] columnNames) {
       this.data = data;
       this.columnNames = columnNames;
   }

   public int getColumnCount() {
       return columnNames.length;
   }

   public int getRowCount() {
       return data.length;
   }

   public Object getValueAt(int row, int col) {
       // System.out.println("第"+(row+1)+"行"+(col+1)+"列："+data[row][col]);
       return data[row][col];
   }

   // 該方法不一定要加入AbstractTableModel類,該方法設置列表的標題
   public String getColumnName(int col) {
       return columnNames[col] + "";
   }

   // 通過getClass()方法設置默認的控件,如true與false的默認控件是複選框,
   // 該方法不一定要加入AbstractTableModel類
   public Class getColumnClass(int c) {
       if(null == getValueAt(0, c))
       {//防止某一列沒有賦值，Boolean類型的話，直接在VO默認爲false,所以在這不判斷。
           return String.class;
       }else{
           return getValueAt(0, c).getClass();
       }
   }

   // 定義可以編輯的單元,true表示可編輯,false表示不可編輯

   public boolean isCellEditable(int row, int col) {

       return true;

   }

   // 將改變後的值保存在表格中
   public void setValueAt(Object value, int row, int col) {
       data[row][col] = value;
       System.out.println(row + 1 + "行:" + (col + 1) + "列:" + value);
       fireTableCellUpdated(row, col);
   }
}