Question

这是我用于将数据从jtable插入数据库的代码：

for(int i=1 ; i <= table.getRowCount() ; i++){

    String productid = table.getValueAt(i, 0).toString();
    String name = table.getValueAt(i, 1).toString();
    String quantity = table.getValueAt(i, 2).toString();
    String totalprice = table.getValueAt(i, 4).toString();

    try {

        String query = "insert into sales (productid,customerid,name,quantity,discount,totalprice,paymentmethod) values (?,?,?,?,?,?,?)";
        pst = con.prepareStatement(query);
        pst.setString(1, productid);
        pst.setString(2, customerid.getText());
        pst.setString(3, name);
        pst.setString(4, quantity);
        pst.setString(5, discount.getText()+"%");
        pst.setString(6, String.valueOf(totalprice));
        pst.setString(7, paymethod.getSelectedItem().toString());
        pst.execute();

        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, e.getMessage());
        }

当我点击按钮时保存它会给我一个错误。

线程“AWT-EventQueue-0”中的异常 java.lang.ArrayIndexOutOfBoundsException：1＆gt; = 1 at java.util.Vector.elementAt（未知来源）at javax.swing.table.DefaultTableModel.getValueAt（未知来源）at javax.swing.JTable.getValueAt（未知来源）at gestioner.Sale $ 8.actionPerformed（Sale.java:332）at javax.swing.AbstractButton.fireActionPerformed（未知来源）

Answer 1

通过Deafault表模型

进行迭代

public String getTableData (JTable table) {
DefaultTableModel dtm = (DefaultTableModel) table.getModel();
int nRow = dtm.getRowCount(), nCol = dtm.getColumnCount();
String tableData = " ";
for (int i = 0 ; i < nRow ; i++)
    for (int j = 0 ; j < nCol ; j++)
       // tableData = dtm.getValueAt(i,j);

String productid = table.getValueAt(i, j).toString();
                    String name = table.getValueAt(i, j).toString();
                    String quantity = table.getValueAt(i, j).toString();
                    String totalprice = table.getValueAt(i, j).toString();

                    try {

                        String query = "insert into sales (productid,customerid,name,quantity,discount,totalprice,paymentmethod) values (?,?,?,?,?,?,?)";
                        pst = con.prepareStatement(query);
                        pst.setString(1, productid);
                        pst.setString(2, customerid.getText());
                        pst.setString(3, name);
                        pst.setString(4, quantity);
                        pst.setString(5, discount.getText()+"%");
                        pst.setString(6, String.valueOf(totalprice));
                        pst.setString(7, paymethod.getSelectedItem().toString());
                        pst.execute();

                    } catch (Exception e) {
                        JOptionPane.showMessageDialog(null, e.getMessage());
                  }
return tableData;
    }

Answer 2

基于错误消息，“ArrayIndexOutOfBoundsException”您试图读取行范围之外的项目;你的for循环应该从0开始而不是1，并且在row-count之前停止，你的for循环应该如下所示：

for(int i=0 ; i <table.getRowCount() ; i++){...

将数据从jtable插入sqlite数据库

2 个答案: