02-书城传参类型异常

类型不一致，出现错误

解决方法：利用工具类进行类型转换（如图所示）即可解决

1         　String name = request.getParameter("name");
2         String author = request.getParameter("author");
3         String priceStr = request.getParameter("price");
4         String salesStr = request.getParameter("sales");
5         String stockStr = request.getParameter("stock");
6         int sales = Integer.parseInt(salesStr);
7         int stock = Integer.parseInt(stockStr);
8         double price = Double.parseDouble(priceStr);
9         Book book = new Book(name, author, price, sales,stock);