问题描述
我在 Microsoft Access 数据库中的三个字段上创建了一个复合索引。如果我尝试手动添加违反索引的行,则索引有效。它也适用于 Javafx 程序,因为它会导致此异常: UCAExc::4.0.2 完整性约束冲突:唯一约束或索引冲突; CLASS_CHECKROOM 表:CLASS
我试图在应用程序不崩溃的情况下捕获此异常,但无济于事。 我试过了:
}catch (sqlException ex) {
if(ex.getMessage().contains("integrity")) {
Alert alertUpdateOK = new Alert(AlertType.informatION);
alertUpdateOK.setTitle("Double Booked");
alertUpdateOK.setContentText(ex.getMessage());
alertUpdateOK.show();
}
}
这输出“No error”,然后发生异常 和:
}catch (sqlException ex) {
Alert alertUpdateOK = new Alert(AlertType.informatION);
alertUpdateOK.setTitle("Double Booked");
alertUpdateOK.setContentText(ex.getMessage());
alertUpdateOK.show();
}
}
这只会导致没有警报的异常并且应用程序崩溃
我见过一些涉及异常错误代码的解决方案 据我了解,ucanaccess 使用 HsqlDB,我尝试过错误代码 25 58 和 104
}catch (sqlException ex) {
if (ex.getsqlState().startsWith("25")) {
Alert alertUpdateOK = new Alert(AlertType.informatION);
alertUpdateOK.setTitle("Double Booked");
alertUpdateOK.setContentText(ex.getMessage());
alertUpdateOK.show();
}
}
“没有错误” PID 重复。输入不同的 PID
帮助将不胜感激。整个代码是
public void insertIntoDB() throws sqlException{
Connection connection =null;
PreparedStatement preparedStatement = null;
if (Integer.parseInt(start) < Integer.parseInt(finish)) {
try {
connection =AccessConnect.Connector();
String sql = "INSERT INTO Class(ClassName,WeekDay,Classstart,ClassFinish,TeacherID,classAge,MaxSize,RoomID,subjectID) VALUES (?,?,?)";
preparedStatement = connection.prepareStatement(sql);
preparedStatement.setString(1,classname);
preparedStatement.setString(2,weekday);
preparedStatement.setString(3,start);
preparedStatement.setString(4,finish);
preparedStatement.setInt(5,teacherid);
preparedStatement.setInt(6,classage);
preparedStatement.setInt(7,maxsize);
preparedStatement.setInt(8,roomid);
preparedStatement.setInt(9,subjectid);
preparedStatement.executeUpdate();
}catch (sqlException ex) {
Alert alertUpdateOK = new Alert(AlertType.informatION);
alertUpdateOK.setTitle("Double Booked");
alertUpdateOK.setContentText(ex.getMessage());
alertUpdateOK.show();
}
finally {
if (preparedStatement != null)
preparedStatement.close();
if (connection !=null)
connection.close();
}
}
else {
Alert alertUpdateOK = new Alert(AlertType.informatION);
alertUpdateOK.setTitle("Times are wrong");
alertUpdateOK.setContentText(" The start time has to be before the end time");
alertUpdateOK.show();
}
}
解决方法
我能够在警报框中捕获异常。我正在使用日食,我需要 清理项目并成功