SSM框架书架管理的Controller层代码实现

好的，以下是一个简单的SSM框架的图书管理系统的Controller层代码实现示例：

@Controller
@RequestMapping("/book")
public class BookController {
    @Autowired
    private BookService bookService;

    @RequestMapping("/list")
    public String list(Model model) {
        List<Book> bookList = bookService.getAllBooks();
        model.addAttribute("bookList", bookList);
        return "book/list";
    }

    @RequestMapping(value = "/add", method = RequestMethod.GET)
    public String add(Model model) {
        model.addAttribute("book", new Book());
        return "book/edit";
    }

    @RequestMapping(value = "/add", method = RequestMethod.POST)
    public String add(Book book) {
        bookService.addBook(book);
        return "redirect:/book/list";
    }

    @RequestMapping(value = "/edit/{id}", method = RequestMethod.GET)
    public String edit(@PathVariable("id") Long id, Model model) {
        Book book = bookService.getBookById(id);
        model.addAttribute("book", book);
        return "book/edit";
    }

    @RequestMapping(value = "/edit", method = RequestMethod.POST)
    public String edit(Book book) {
        bookService.updateBook(book);
        return "redirect:/book/list";
    }

    @RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
    public String delete(@PathVariable("id") Long id) {
        bookService.deleteBookById(id);
        return "redirect:/book/list";
    }
}

这段代码实现了对图书的增加、修改、删除和查询功能，其中：

- `@Controller`注解表示这是一个控制器类；
- `@RequestMapping`注解用于映射请求路径；
- `@Autowired`注解用于自动注入依赖的`BookService`服务；
- `Model`对象用于向视图中传递数据；
- `@PathVariable`注解用于获取请求路径中的参数；
- `@RequestParam`注解用于获取请求参数；
- `redirect:`关键字用于重定向到另一个请求路径。

希望这个示例能够帮助你理解SSM框架中Controller层的代码实现。