我试图将一些JTable数据保存到数据库中：我的代码是这样的：

public void save(){

String invSL = new Mixed_Calculation().invoice_Sl();

jTextField6.setText(invSL);

int rows = jTable1.getRowCount();

for(int row = 0; row

String code = (String) jTable1.getValueAt(row, 1);

String name = (String) jTable1.getValueAt(row, 2);

String unit = (String) jTable1.getValueAt(row, 3);

String units[] = unit.split(" ");

int q = Integer.parseInt(units[0]);

String u = units[1];

String rate = (String) jTable1.getValueAt(row, 4);

String total = (String) jTable1.getValueAt(row, 5);

String d_rat = (String) jTable1.getValueAt(row, 6);

String discount = (String) jTable1.getValueAt(row, 7);

String net = (String) jTable1.getValueAt(row, 8);

try{

conn = new connection().db();

conn.setAutoCommit(false);

String query = "INSERT INTO INVOICE(INVOICE_NO, CODE, DESCRIPTION, BONUSABLE,"

+ " TAXABLE, CATEGORY, QNTY, UNIT, RATE, TOTAL , DISC_PERCENTAGE, DISCOUNT, NET_AMOUNT ) "

+ " VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) " ;

stmt = conn.prepareStatement(query);

stmt.setString(1, jTextField6.getText()); //Invoice No

stmt.setString(2, code); //Code

stmt.setString(3, name); //Description

stmt.setString(4, ""); //Bonusable

stmt.setString(5, ""); //Taxable

stmt.setString(6, ""); //Category

stmt.setInt(7, q); //Qnty

stmt.setString(8, u); //Unit

stmt.setDouble(9, Double.parseDouble(rate)); //Rate

stmt.setDouble(10, Double.parseDouble(total)); //Total

stmt.setDouble(11, Double.parseDouble(d_rat)); //Disc_%

stmt.setDouble(12, Double.parseDouble(discount)); //Discount

stmt.setDouble(13, Double.parseDouble(net)); //net_Amount

stmt.addBatch(); stmt.executeBatch();

conn.commit();

}

catch(SQLException ex){

JOptionPane.showMessageDialog(null, "Cannot save. "+ ex);

}

finally{try{stmt.close(); conn.close(); conn.setAutoCommit(true);} catch(SQLException ex){} }

}

}

为什么这种方法根本没有效果？我在这里做错什么了吗？是否有其他系统可以直接从jTable插入数据？

解决方法:

将批处理的执行置于for循环之外,这是addBatch()的好处,因为它仅在一次调用executeBatch()时才访问数据库.

for(int row = 0; row

{

//......

stmt.addBatch();

}

stmt.executeBatch();

conn.commit();

标签：defaulttablemodel,swing,jtable,java,database

来源： https://codeday.me/bug/20191123/2064435.html