springmvc的基本增删改查

package controller; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import domain.Book; import domain.Category; import servises.BookService; /* *作为控制类，连接视图 */ @Controller public class BookController{ @Autowired private BookService bookService; private static final Log logger= LogFactory.getLog(BookController.class); /* *相应input.action页面 *添加 *编辑 *保存 *更新 *显示 */ @RequestMapping(value="/book_input") public String inputBook(Model model ){ List<Category> categories=bookService.getCategories(); model.addAttribute("categories",categories); model.addAttribute("Book",new Book()); return "bookAdd"; } @RequestMapping(value="/book_edit/{id}") public String editBook(Model model,@PathVariable long id){ List<Category> categories= bookService.getCategories(); model.addAttribute("categories", categories); Book book=bookService.getBook(id); model.addAttribute("Book", book); return "bookEdit"; } @RequestMapping(value="/book_save") public String saveBook(@ModelAttribute Book book){ Category category= bookService.getCategory(book.getCategory().getId()); book.setCategory(category); bookService.save(book); //重定向 return "redirect:/book_list"; } @RequestMapping(value="/book_up") public String updateBook(@ModelAttribute Book book){ Category category= bookService.getCategory(book.getCategory().getId()); book.setCategory(category); bookService.update(book); return "redirect:/book_list"; } @RequestMapping(value="/book_list") public String bookList(Model model){ logger.info("book_list"); List<Book> books=bookService.getAllBooks(); model.addAttribute("books", books); return "BookList"; } }