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

               

 

 

        　String name = request.getParameter("name");
        String author = request.getParameter("author");
        String priceStr = request.getParameter("price");
        String salesStr = request.getParameter("sales");
        String stockStr = request.getParameter("stock");
        int sales = Integer.parseInt(salesStr);
        int stock = Integer.parseInt(stockStr);
        double price = Double.parseDouble(priceStr);
        Book book = new Book(name, author, price, sales,stock);