我用的是sql2000
数据库查询代码
public static ResultSet select(String sql) //
{
try{
if(conn==null)
new Dao();
return conn.createStatement(
ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE).executeQuery(sql);
}
catch(SQLException e)
{
e.printStackTrace();
return null;
}
finally{
}
}
按钮事件代码
OK.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dao.select("select name from tb_user where '"+name.getText()+"'");
if (name.getText().equals("")) {
JOptionPane.showMessageDialog(null, "用户名不能为空!");
return;
}
else if (passdword.getText().equals("")) {
JOptionPane.showMessageDialog(null, "密码不能为空!");
return;
}
if(name.getText().equals("aa") && passdword.getToolTipText()=="aa");
{
Menu mn=new Menu();
mn.setVisible(true);
login.this.setVisible(false);
}
}
});