Question

我正在尝试将多行数据从JTable保存到数据库中，这是我的参考代码：

try{

int rows=tblCO2.getRowCount();

for(int row = 0; row<rows; row++)
{
    String coitemname = (String)tblCO2.getValueAt(row, 0);
    String cocateg = (String)tblCO2.getValueAt(row, 1);
    String codesc = (String)tblCO2.getValueAt(row, 2);
    String coloc = (String)tblCO2.getValueAt(row, 3);
    String coitemtagno = (String)tblCO2.getValueAt(row, 4);
    try
    {
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/iotams",user,pass);
        conn.setAutoCommit(false);

        String queryco = "Insert into tblcheckout(CheckoutID,ItemTagNo,ItemName,Category,Description,Location) values (?,?,?,?,?)";
        pst = conn.prepareStatement(queryco);

        pst.setString(1, coitemname);
        pst.setString(2, cocateg);
        pst.setString(3, codesc);
        pst.setString(4, coloc);
        pst.setString(5, coitemtagno);

        pst.addBatch();
    }
    catch(Exception e)
    {
    }
}
pst.executeBatch();
conn.commit();
}
catch(Exception e){
    JOptionPane.showMessageDialog(this,e.getMessage());
}

问题是，它只是将一行数据插入数据库。有人可以帮帮我吗？ :(谢谢！

Answer 1

从循环中删除以下行代码并在循环之前放置

Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/iotams",user,pass);
conn.setAutoCommit(false);
String queryco = "Insert into tblcheckout(CheckoutID,ItemTagNo,ItemName,Category,Description,Location) values (?,?,?,?,?)";
pst = conn.prepareStatement(queryco);

示例：按照代码

替换您的代码

try{

int rows=tblCO2.getRowCount();
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/iotams",user,pass);
conn.setAutoCommit(false);

String queryco = "Insert into tblcheckout(CheckoutID,ItemTagNo,ItemName,Category,Description,Location) values (?,?,?,?,?)";
pst = conn.prepareStatement(queryco);
for(int row = 0; row<rows; row++)
{
    String coitemname = (String)tblCO2.getValueAt(row, 0);
    String cocateg = (String)tblCO2.getValueAt(row, 1);
    String codesc = (String)tblCO2.getValueAt(row, 2);
    String coloc = (String)tblCO2.getValueAt(row, 3);
    String coitemtagno = (String)tblCO2.getValueAt(row, 4);
    pst.setString(1, coitemname);
    pst.setString(2, cocateg);
    pst.setString(3, codesc);
    pst.setString(4, coloc);
    pst.setString(5, coitemtagno);

    pst.addBatch();
}
pst.executeBatch();
conn.commit();
}
catch(Exception e){
    JOptionPane.showMessageDialog(this,e.getMessage());
}

然后运行它认为它有效。

对于批量插入示例，此处为https://my.vertica.com/docs/5.0/HTML/Master/14878.htm

Answer 2

上面的代码无法在netbeans中运行，但是我为netbeans做了一个版本。

try{

  int rows=jTable1.getRowCount();

  for(int row = 0; row<rows; row++)
  {   
    Integer qty = (Integer)jTable1.getValueAt(row, 0);
    Double unitprice = (Double) jTable1.getValueAt(row, 1);
    String description = (String)jTable1.getValueAt(row, 2);
    Double total = (Double)jTable1.getValueAt(row, 3);
    String queryco = "Insert into invoice(qty,unitprice,description,total) values ('"+qty+"','"+unitprice+"','"+description+"','"+total+"')";

    pst = conn.prepareStatement(queryco);
    pst.execute();     
  }
  JOptionPane.showMessageDialog(null, "Successfully Save");
}
catch(Exception e){
  JOptionPane.showMessageDialog(this,e.getMessage());
}

将多行行数据从Jtable插入数据库

2 个答案: