Java 为什么要让JTable从数据库中获取数据并删除第一行?
我正试图使一个表中的数据,我使条件删除从。。。到数据返回一行,可能是删除了一行?我的代码:Java 为什么要让JTable从数据库中获取数据并删除第一行?,java,mysql,swing,Java,Mysql,Swing,我正试图使一个表中的数据,我使条件删除从。。。到数据返回一行,可能是删除了一行?我的代码: JScrollPane scrollPane_9 = new JScrollPane(); scrollPane_9.setBounds(10, 105, 1396, 524); month.add(scrollPane_9); DefaultTableModel tableModel = new DefaultTableModel(); table_10 = new JTable(tableModel)
JScrollPane scrollPane_9 = new JScrollPane();
scrollPane_9.setBounds(10, 105, 1396, 524);
month.add(scrollPane_9);
DefaultTableModel tableModel = new DefaultTableModel();
table_10 = new JTable(tableModel);
scrollPane_9.setViewportView(table_10);
tableModel.addColumn("INVOICE ID ");
tableModel.addColumn("DATE");
tableModel.addColumn("CASH");
tableModel.addColumn("MADA");
tableModel.addColumn("COPON PRISE");
tableModel.addColumn("COPONE NAME");
tableModel.addColumn("SELMAN");
tableModel.addColumn("DESCRIPTION");
String sqlQ = "SELECT `invoiceid`,`date`,`cash`,`payme`, `coponpri`, `copon`,`selman`,`desc` FROM `daay` where DATE between DATE(?) and DATE(?)";
PreparedStatement pstmt5 = con.prepareStatement(sqlQ);
pstmt5.setDate(1, date8);
pstmt5.setDate(2,date9);
ResultSet rs4 = pstmt5.executeQuery();
if (rs4.next() == false)
{
JOptionPane.showMessageDialog(null, "لا يوجد مبيعات في هذا الشهر");
}
else
{
tableModel.addRow(new Object[]{"","","","","","","",""});
while(rs4.next()){
tableModel.addRow(new Object[]{rs4.getInt(1), rs4.getDate(2),rs4.getInt(3),rs4.getInt(4),rs4.getInt(5),rs4.getString(6),rs4.getString(7),rs4.getString(8)});
}
}
这些数据对我来说不那么稀薄
您读取循环外的第一行,因此它永远不会添加到模型中
你的逻辑应该是这样的:
tableModel.addRow(new Object[]{"","","","","","","",""});
while(rs4.next())
{
tableModel.addRow(new Object[]{rs4.getInt(1), rs4.getDate(2), rs4.getInt(3), rs4.getInt(4), rs4.getInt(5), rs4.getString(6), rs4.getString(7), rs4.getString(8)});
}
if (tableModel.getRowCount() == 1)
{
JOptionPane.showMessageDialog(null, "لا يوجد مبيعات في هذا الشهر");
}
也就是说,在遍历ResultSet之后,检查添加到模型中的行数
或者,也许你可以使用:
//if (rs4.next() == false)
if (rs4.isLast())
我不是SQL专家,所以我不确定空结果集会返回什么。对于接下来两次调用的第一条记录。如果rs4.next==false。。。接下来{非常感谢你,它很有效
//if (rs4.next() == false)
if (rs4.isLast())