例如: String user_mima = request.getParameter("user_mima"); select mima from user where name="user_mima"; 例子写错了 应该是这样: String user_name = request.getParameter("user_name"); select mima from user where name="user_name";
当然可以。但是这个变量要拼接进sql语句。你的第二行的写法不妥,这样写是name="user_mima"这个字符串。而不是把user_mima看作变量。 String user_mima = request.getParameter("user_mima"); String sql = "select mima from user where name="+user_mima;追问
求把user_name当作变量的正确写法 String sql="select mima from user where name='user_name' " ;