我在做毕业设计,现在遇到的问题是,我输入帐号和密码,然后选择学生,再点击登录,跳转到学生界面,我不知道为什么跳转不过去,求高手指点,不胜感激!![CSDN移动问答][1]
下面是我写的方法,新手,还望见谅
public void actionPerformed(ActionEvent e) {
Connection dbConn = null;
Statement stm = null;
ResultSet rs = null;
if(student.isSelected()){
if(tf.getText().equals("")||passw.getText().equals("")){
JOptionPane.showMessageDialog(MainFrame.this,"用户名密码不能为空!" );
}
else{
String username=tf.getText();
String password=passw.getText();
String str="select * from 用户信息 where 帐号='"+username+"'and 密码='"+password+"'";
try {
stm=dbConn.createStatement(
ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
rs=stm.executeQuery(str);
if(rs.next()){
String xm=rs.getString("password");
if(e.getSource()==btn)
if(passw.getText().equals(xm.trim())){JOptionPane.showMessageDialog(MainFrame.this,"登录成功");
dispose();
new Student("学生界面");
}} }catch (SQLException ex) {
ex.printStackTrace();
}
}
}