java+mysql实现图书馆管理系统实战

@Controller
public class LendController {
 @Autowired
 private LendService lendService;

 @Autowired
 private BookService bookService;

 @RequestMapping("/deletebook.html")
 public String deleteBook(HttpServletRequest request, RedirectAttributes redirectAttributes) {
 long bookId = Long.parseLong(request.getParameter("bookId"));
 if (bookService.deleteBook(bookId)) {
 redirectAttributes.addFlashAttribute("succ", "图书删除成功！");
 } else {
 redirectAttributes.addFlashAttribute("error", "图书删除失败！");
 }
 return "redirect:/admin_books.html";
 }

 @RequestMapping("/lendlist.html")
 public ModelAndView lendList(HttpServletRequest request) {
 ModelAndView modelAndView = new ModelAndView("admin_lend_list");
 modelAndView.addObject("list", lendService.lendList());
 return modelAndView;
 }

 @RequestMapping("/mylend.html")
 public ModelAndView myLend(HttpServletRequest request) {
 ReaderCard readerCard = (ReaderCard) request.getSession().getAttribute("readercard");
 ModelAndView modelAndView = new ModelAndView("reader_lend_list");
 modelAndView.addObject("list", lendService.myLendList(readerCard.getReaderId()));
 return modelAndView;
 }

 @RequestMapping("/deletelend.html")
 public String deleteLend(HttpServletRequest request, RedirectAttributes redirectAttributes) {
 long serNum = Long.parseLong(request.getParameter("serNum"));
 if (lendService.deleteLend(serNum) > 0) {
 redirectAttributes.addFlashAttribute("succ", "记录删除成功！");
 } else {
 redirectAttributes.addFlashAttribute("error", "记录删除失败！");
 }
 return "redirect:/lendlist.html";
 }

 @RequestMapping("/lendbook.html")
 public String bookLend(HttpServletRequest request, RedirectAttributes redirectAttributes) {
 long bookId = Long.parseLong(request.getParameter("bookId"));
 long readerId = ((ReaderCard) request.getSession().getAttribute("readercard")).getReaderId();
 if (lendService.lendBook(bookId, readerId)) {
 redirectAttributes.addFlashAttribute("succ", "图书借阅成功！");
 } else {
 redirectAttributes.addFlashAttribute("succ", "图书借阅成功！");
 }
 return "redirect:/reader_books.html";
 }

 @RequestMapping("/returnbook.html")
 public String bookReturn(HttpServletRequest request, RedirectAttributes redirectAttributes) {
 long bookId = Long.parseLong(request.getParameter("bookId"));
 long readerId = ((ReaderCard) request.getSession().getAttribute("readercard")).getReaderId();
 if (lendService.returnBook(bookId, readerId)) {
 redirectAttributes.addFlashAttribute("succ", "图书归还成功！");
 } else {
 redirectAttributes.addFlashAttribute("error", "图书归还失败！");
 }
 return "redirect:/reader_books.html";
 }
}