Question

我正在尝试从java中的MS Access数据库中提取一些值。我在以下查询中面临困难 -

PreparedStatement p = c.prepareStatement("select GroupMembers from group_data where GroupName = ? and GroupOwnerID = ?");
p.setString(1,gsel);
p.setInt(2,empid);

它给我一个错误 - 期望的参数太少3

但是当我使用时 -

PreparedStatement p = c.prepareStatement("select GroupMembers from group_data where         GroupName = ?");
p.setString(1,gsel);

它运作得很好。

我的表架构是：

GroupName    GroupMembers   GroupOwnerID
text         text           number

第一个查询有什么问题？

这是堆栈跟踪

java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] Too few paramet
ers. Expected 3.
        at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6964)
        at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7121)
        at sun.jdbc.odbc.JdbcOdbc.SQLExecute(JdbcOdbc.java:3156)
        at sun.jdbc.odbc.JdbcOdbcPreparedStatement.execute(JdbcOdbcPreparedState
ment.java:215)
        at sun.jdbc.odbc.JdbcOdbcPreparedStatement.executeQuery(JdbcOdbcPrepared
Statement.java:90)
        at ntpc.Sms$1$4$3.actionPerformed(Sms.java:743)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:20
18)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2341)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:402)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259
)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:252)
        at java.awt.Component.processMouseEvent(Component.java:6505)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
        at java.awt.Component.processEvent(Component.java:6270)
        at java.awt.Container.processEvent(Container.java:2229)
        at java.awt.Component.dispatchEventImpl(Component.java:4861)
        at java.awt.Container.dispatchEventImpl(Container.java:2287)
        at java.awt.Component.dispatchEvent(Component.java:4687)
        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:4687)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
        at java.awt.EventQueue.access$200(EventQueue.java:103)
        at java.awt.EventQueue$3.run(EventQueue.java:694)
        at java.awt.EventQueue$3.run(EventQueue.java:692)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:87)
        at java.awt.EventQueue$4.run(EventQueue.java:708)
        at java.awt.EventQueue$4.run(EventQueue.java:706)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:242)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:161)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.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

您可以查看此官方指南以查询访问数据库http://office.microsoft.com/en-us/access-help/examples-of-query-criteria-HA010066611.aspx

准备好的声明不与运营商合作

1 个答案: