try{
stat.setString(1,TitleText.getText());
stat.setString(2,new String(UserPassword.getPassword()));
pid=stat.executeQuery();
if(pid.next()){
JOptionPane.showMessageDialog(Employee_Login,"登录成功");
}else{
JOptionPane.showMessageDialog(Employee_Login,"登录失败");
}
}catch(SQLException e){
System.out.println("Error");
}
错误异常 请我帮解决下啊 谢谢高手大哥大姐们啦
java.lang.ClassNotFoundException: sun.jdbc,odbc.JdbcOdbcDriver
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at Employee_Management.actionPerformed(Employee_Management.java:95)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)小弟真的不知道是什么原因了明天要交作业 可以找不出原因啊
stat.setString(1,TitleText.getText());
stat.setString(2,new String(UserPassword.getPassword()));
pid=stat.executeQuery();
if(pid.next()){
JOptionPane.showMessageDialog(Employee_Login,"登录成功");
}else{
JOptionPane.showMessageDialog(Employee_Login,"登录失败");
}
}catch(SQLException e){
System.out.println("Error");
}
错误异常 请我帮解决下啊 谢谢高手大哥大姐们啦
java.lang.ClassNotFoundException: sun.jdbc,odbc.JdbcOdbcDriver
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at Employee_Management.actionPerformed(Employee_Management.java:95)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)小弟真的不知道是什么原因了明天要交作业 可以找不出原因啊
System.out.println("Error");
}
你又不准备输出详细错误信息,为什么不用Exception e呢?
工程没有 添加jar包
{
Employee_Management Exam=new Employee_Management();
try{
Class.forName("sun.jdbc,odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc:odbc:MydataSource","sa","66978061");
stat=con.prepareStatement("select * from Administrators where UseName=? and Pass_word=?");
}catch(Exception e){
System.out.println(e);
}
{
Employee_Management Exam=new Employee_Management();
try{
Class.forName("sun.jdbc,odbc.JdbcOdbcDriver"); //你写了逗号
con=DriverManager.getConnection("jdbc:odbc:MydataSource","sa","66978061");
stat=con.prepareStatement("select * from Administrators where UseName=? and Pass_word=?");
}catch(Exception e){
System.out.println(e);
}
sun.jdbc.odbc.JdbcOdbcDriver