Mysql 例外情况；参数索引超出范围（1>；参数数量，即0）。”；

pstm

是否在您的代码中定义？希望您需要将

prepareStatement

分配给

pstm

，然后您可以设置参数值

query="INSERT INTO paint_inventory(ID,Name,type,gallons,quarters) VALUES(?,?,?,?,?)";
con.prepareStatement(query);
pstm.setInt(1,Integer.parseInt(itemID_newitem_field.getText()));
pstm.setString(2,name_newitem_field.getText());
pstm.setString(3,type_newitem_field.getText());
pstm.setInt(4,Integer.parseInt(gallons_quantity_newitem_field.getText()));
pstm.setInt(5,Integer.parseInt(quarters_quantity_newitem_field.getText()));
pstm.execute();
JOptionPane.showMessageDialog(rootPane,"item has been registered");

还要确保pstm不用于另一个

prepareStatement

使用相同方法或其他方法。每个

prepareStatement

都应该有单独的变量名来设置参数值

query="INSERT INTO paint_inventory(ID,Name,type,gallons,quarters) VALUES(?,?,?,?,?)";
con.prepareStatement(query);
pstm.setInt(1,Integer.parseInt(itemID_newitem_field.getText()));
pstm.setString(2,name_newitem_field.getText());
pstm.setString(3,type_newitem_field.getText());
pstm.setInt(4,Integer.parseInt(gallons_quantity_newitem_field.getText()));
pstm.setInt(5,Integer.parseInt(quarters_quantity_newitem_field.getText()));
pstm.execute();
JOptionPane.showMessageDialog(rootPane,"item has been registered");

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谢谢兄弟…我在用pstm做另一个准备声明…现在它工作得很好…非常感谢bro@nabeel如果它解决了你的问题，你可以接受