request.getParameter()方法为什么只能用string否则会报错,数据库中int 类型的数据该如何调用
String id = request.getParameter("id");
String name = request.getParameter("name");
int price = Integer.parseInt(request.getParameter("price"));
String kind = request.getParameter("kind");
String provider = request.getParameter("provider");
int num = Integer.parseInt(request.getParameter("num"));
上图中在网上找到方法int num = Integer.parseInt(request.getParameter("num")); 用这个形式,但是运行出现如下报错