REPORT-28922 正如zack所说，列数较少的情况没有测试过

designer-base/src/main/java/com/fr/design/data/tabledata/tabledatapane/EmbeddedTableDataDefinedPane.java

@@ -25,7 +25,7 @@ import java.util.Date;
 
 
 public class EmbeddedTableDataDefinedPane extends BasicPane{
-	
+	private static final int MIN_CELL_WIDTH = 30;
 	private EmbeddedTableData tableData;
 	private JTable dataJTable;
 	private UIButton add;
@@ -64,7 +64,7 @@ public class EmbeddedTableDataDefinedPane extends BasicPane{
     	// 行号显示
         TableColumn tableColumn = dataJTable.getColumnModel().getColumn(0);
         tableColumn.setCellRenderer(new CellRenderer());
-        tableColumn.setMaxWidth(dataJTable.getColumnCount());
+        tableColumn.setMaxWidth(Math.max(dataJTable.getColumnCount(), MIN_CELL_WIDTH));
         
         // 控制按钮
         add = new UIButton(com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Add"));

designer-base/src/main/java/com/fr/design/data/tabledata/tabledatapane/EmbeddedTableDataPane.java

@@ -34,6 +34,7 @@ import java.util.Date;
 
 
 public class EmbeddedTableDataPane extends AbstractTableDataPane<EmbeddedTableData> {
+	private static final int MIN_CELL_WIDTH = 30;
 	private JTable dataJTable ;
 	private JScrollPane scrollPane;
 	private UILabel coordinatelabel;
@@ -220,7 +221,7 @@ public class EmbeddedTableDataPane extends AbstractTableDataPane<EmbeddedTableDa
 		// 行号显示,每次dateJTable的表结构发生变化时都要调用
 		TableColumn tableColumn = dataJTable.getColumnModel().getColumn(0);
 		tableColumn.setCellRenderer(new CellRenderer());
-		tableColumn.setMaxWidth(dataJTable.getColumnCount());
+		tableColumn.setMaxWidth(Math.max(dataJTable.getColumnCount(), MIN_CELL_WIDTH));
 	}
 
 	private class DoubleRenderer extends DefaultTableCellRenderer {