有必要这样吗?
查询一下不就完事了?Statement stmt=con.createStatement();ResultSet rs=stmt.executeQuery("select * from tb where username=\'"+username+"\' and password=\'"+pwd+"\'");if(rs.next()){
System.out.println("成功");
}
rs.close();
stmt.close();
查询一下不就完事了?Statement stmt=con.createStatement();ResultSet rs=stmt.executeQuery("select * from tb where username=\'"+username+"\' and password=\'"+pwd+"\'");if(rs.next()){
System.out.println("成功");
}
rs.close();
stmt.close();
我不懂java乱说的. 或许java自己本身有处理也不一定.