如何删除记录(字符串)JAVA和MYSQL
发布时间:2020-12-14 05:17:45 所属栏目:Java 来源:网络整理
导读:我成功地删除了一个整数,但是当我试图将它变为STRING时它会说 “where子句中的未知列itemtodelete但是我的ITEMTODELETE是在数据库中声明的STRING不是一个整数它不删除一个STRING多少? 下面是我的代码: private void DeleteButtonActionPerformed(java.awt.
我成功地删除了一个整数,但是当我试图将它变为STRING时它会说
“where子句中的未知列itemtodelete但是我的ITEMTODELETE是在数据库中声明的STRING不是一个整数它不删除一个STRING多少? 下面是我的代码: private void DeleteButtonActionPerformed(java.awt.event.ActionEvent evt) { int del = (prompt): if (del == JOptionPane.YES_OPTION){ DelCurRec(); } } public void DelCurRec() { String id = field.getText(); String SQL = "DELETE FROM inventory WHERE ItemCode = "+id+" "; try { Class.forName(connectio); } catch (Exception e) { JOptionPane.showMessageDialog(null,""+e.getMessage(),"JDBC Driver Error",JOptionPane.WARNING_MESSAGE); } Statement stmt = null; Connection con = null; //Creates connection to database try { con = DriverManager.getConnection("Connection"); stmt = con.createStatement(); } catch (Exception e) { JOptionPane.showMessageDialog(null,"Connection Error",JOptionPane.WARNING_MESSAGE); } //Execute the SQL statment for deleting records try { stmt.executeUpdate(SQL); //This closes the connection to the database con.close(); //This closes the dialog JOptionPane.showMessageDialog(null,"Deleted Succesfully","Delete Successful",JOptionPane.WARNING_MESSAGE); } catch (Exception e) { JOptionPane.showMessageDialog(null,"Communication Error",JOptionPane.WARNING_MESSAGE); } } 解决方法
尝试更改线路:
String SQL = "DELETE FROM inventory WHERE ItemCode = "+id+" "; 至 String SQL = "DELETE FROM inventory WHERE ItemCode = '"+id+"' "; (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |