无法在 MySql JDBC 中获取自动生成的 ID

Question

我试图在执行插入操作后获取自动生成的 ID。我有一个名为 sg_InsuranceInfo 的表，它会生成一个 autoIncremented id。所以我需要得到它。我附上了示例代码供参考

try
{
    String insertQuery = "INSERT INTO sg_InsuranceInfo(Patient_Name,LIC_Name) VALUES(?,?)";
    PreparedStatement preparedStatement = getConnectionObject().getConnection().prepareStatement(insertQuery,  Statement.RETURN_GENERATED_KEYS);
    preparedStatement.setString(1, insuranceInformation.getPatientName());
    preparedStatement.setString(2, insuranceInformation.getLicName());
    int noOfRowsAffected = preparedStatement.executeUpdate();
    if (noOfRowsAffected != 0)
    {
        ResultSet resultSet = preparedStatement.getGeneratedKeys();
        if(resultSet.next())
        {
            System.out.println(resultSet.getInt(1));
        }
    }
}
catch (SQLException e)
{
    e.printStackTrace();
} 

这是错误文本

Exception in thread "AWT-EventQueue-0" java.lang.AbstractMethodError: com.inet.tds.TdsConnection.prepareStatement(Ljava/lang/String;I)Ljava/sql/PreparedStatement;
at hospitalApp.common.InsuranceObject.saveInformation(InsuranceObject.java:42)
at hospitalApp.common.InsuranceObject.updateInformationToDatabase(InsuranceObject.java:161)
at hospitalApp.common.InsuranceController.actionPerformed(InsuranceController.java:117)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6516)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6281)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4872)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747)
at java.awt.EventQueue.access$300(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:706)
at java.awt.EventQueue$3.run(EventQueue.java:704)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:720)
at java.awt.EventQueue$4.run(EventQueue.java:718)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:717)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Answer 1

AbstractMethodError.html

当应用程序尝试调用抽象方法时抛出。一般， 这个错误被编译器捕获；此错误只能在运行时发生 如果某个类的定义从那时起发生了不兼容的更改，则时间 当前执行的方法是最后一次编译的

我怀疑您可能使用不同版本的 JDBC jar 文件来编译和运行您的程序，因为这只会在运行时发生。

Answer 2

它完成了工作

public void saveInformation(InsuranceInformation insuranceInformation)
{       
    try
    {
        int noOfRowsAffected = getConnectionObject().getStatement().executeUpdate(
                "INSERT INTO sg_InsuranceInfo(Patient_Name,LIC_Name) VALUES(" + "'" + insuranceInformation.getPatientName() + "','" + insuranceInformation.getLicName() + "'"
                        + ")");
        if (noOfRowsAffected != 0)
        {
            ResultSet autoGeneratedId = getConnectionObject().getStatement().executeQuery("SELECT SCOPE_IDENTITY()");
            if(autoGeneratedId.next())
            {
                System.out.println(autoGeneratedId.getInt(1));
            }
        }
    }
    catch (SQLException e)
    {
        e.printStackTrace();
    }
}

您可以在此处获取更多信息http://blog.sqlauthority.com/2007/03/25/sql-server-identity-vs-scope_identity-vs-ident_current-retrieve-last-inserted-identity-of-record/