网上图书商城项目学习笔记-032编辑图书第二步

一、流程分析

二、代码

1.view层

(1).jsp

(2).js

 

2.servlet层

(1)AdminBookServlet.java 

 1     /**
 2      * 编辑图书
 3      * @param req
 4      * @param resp
 5      * @return
 6      * @throws ServletException
 7      * @throws IOException
 8      */
 9     public String edit(HttpServletRequest req, HttpServletResponse resp)
10             throws ServletException, IOException {
11         Map<String,String[]> map = req.getParameterMap();
12         Book book = CommonUtils.toBean(map, Book.class);
13         Category category = new Category();
14         category.setCid(req.getParameter("cid"));
15         book.setCategory(category);
16         bookService.eidt(book);
17         req.setAttribute("msg", "修改图书成功！");
18         return "f:/adminjsps/msg.jsp";
19     }

 

3.service层

(1).java

 

4.dao层

(1)BookDao.java

 1 /**
 2      * 修改图书
 3      * @param book
 4      *         String sql = "insert into t_book(bid,bname,author,price,currPrice," +
 5                 "discount,press,publishtime,edition,pageNum,wordNum,printtime," +
 6                 "booksize,paper,cid,image_w,image_b)" +
 7      * @throws SQLException 
 8      */
 9     public void edit(Book book) throws SQLException {
10         String sql = "update t_book set bname=?,author=?,price=?,currPrice=?," +
11                 "discount=?,press=?,publishtime=?,edition=?,pageNum=?,wordNum=?," +
12                 "printtime=?,booksize=?,paper=?,cid=? where bid=?";
13         Object[] params = {book.getBname(),book.getAuthor(),
14                 book.getPrice(),book.getCurrPrice(),book.getDiscount(),
15                 book.getPress(),book.getPublishtime(),book.getEdition(),
16                 book.getPageNum(),book.getWordNum(),book.getPrinttime(),
17                 book.getBooksize(),book.getPaper(), 
18                 book.getCategory().getCid(),book.getBid()};
19         qr.update(sql, params);
20     }