基于springboot+JPA+MySQL的网上借阅系统前端及后台，前端.zip

package com.attjl.online_borrow.controller; import com.attjl.online_borrow.LastTime; import com.attjl.online_borrow.entity.Book; import com.attjl.online_borrow.entity.Borrow; import com.attjl.online_borrow.entity.DeliveryInfo; import com.attjl.online_borrow.entity.User; import com.attjl.online_borrow.repository.BookRepository; import com.attjl.online_borrow.repository.BorrowRepository; import com.attjl.online_borrow.repository.DeliveryInfoRepository; import com.attjl.online_borrow.repository.UserRepository; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import javax.servlet.http.HttpSession; import javax.xml.crypto.Data; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.List; @Controller public class BorrowController { @Autowired BookRepository bookRepository; @Autowired UserRepository userRepository; @Autowired BorrowRepository borrowRepository; @Autowired DeliveryInfoRepository deliveryInfoRepository; @ResponseBody @PostMapping("/Submit_orders/submit") //下单处理 active：找到配送信息， id：为图书主键， quantity：购买数量 public String Transact(HttpSession session, @RequestParam("active") Integer active,@RequestParam("id") Integer id,@RequestParam("quantity") Integer quantity) { Date date=new Date(); User user=(User)session.getAttribute("loginUser"); //获取登陆者信息，强制转换为User类型 Book book=bookRepository.findById(id); if(book.getStock()>=quantity){ Borrow borrow=new Borrow(); //必须在此创建一个新的对象，不能引入一个borrow对象，不然插入数据会变成更新数据 borrow.setNumbering(book.getNumbering()); borrow.setQuantity(quantity); borrow.setUsername(user.getUsername()); borrow.setType(1); borrow.setLibraryType(1); borrow.setSerialNumber(active); borrow.setTime(date); book.setStock(book.getStock()-quantity);//库存自减借阅数量 book.setBw_amount(book.getBw_amount()+quantity); //借阅量自加借阅数量 bookRepository.save(book); borrowRepository.save(borrow); return "订单提交成功！"; } else return "对不起，该书库存为"+book.getStock()+",您不能借阅"+quantity+"本"; } @RequestMapping("/my_page") public String showDelivering(Model model,HttpSession session){ User user=(User)session.getAttribute("loginUser"); List<Borrow> borrows= borrowRepository.findDelivering(user.getUsername(),1); if(!borrows.isEmpty()){ List<Book> books=new ArrayList<>(); for(Borrow borrow:borrows){ books.add(bookRepository.findNumbering(borrow.getNumbering())); } model.addAttribute("books",books); model.addAttribute("borrows",borrows); return "my_page"; } else return "my_page"; } @ResponseBody @PostMapping("/cancelOrder") //取消订单 public void cancelOrder(@RequestParam("index") Integer i,HttpSession session){ User user=(User)session.getAttribute("loginUser"); Borrow borrow=borrowRepository.findDelivering(user.getUsername(),1).get(i); borrow.setType(0); borrowRepository.save(borrow); } @ResponseBody @PostMapping("/arrived") //用户确认书本送达 public void arrived(HttpSession session,@RequestParam("index") Integer i){ User user=(User)session.getAttribute("loginUser"); Borrow borrow= borrowRepository.findDelivering(user.getUsername(),1).get(i); borrow.setType(2); //借阅的图书进入借阅未归还状态 borrowRepository.save(borrow); } @ResponseBody @PostMapping("/returnBook") //用户确认归还图书 public void returnBook(HttpSession session,@RequestParam("index") Integer i){ Date date=new Date(); //获取当前系统的时间 User user=(User)session.getAttribute("loginUser"); Borrow borrow= borrowRepository.findDelivering(user.getUsername(),2).get(i); borrow.setType(3); //归还借阅的图书，发出还书申请后的借阅状态 borrow.setReturnTime(date); Long allTime= borrow.getReturnTime().getTime()-borrow.getTime().getTime(); //用户总共借阅的时长 borrow.setBorrowedTime(LastTime.calculatingTime(allTime));//以天、时、分、秒的形式记录总借阅时长 borrowRepository.save(borrow); } @RequestMapping("/my_finished") //用户借阅未归还 public String borrowFinished(HttpSession session,Model model){ Date date=new Date(); //获取当前系统时间 User user=(User)session.getAttribute("loginUser"); List<Borrow> borrows2=borrowRepository.findDelivering(user.getUsername(),2);//借阅中未归还 List<Book> books=new ArrayList<>(); for(Borrow borrow2:borrows2){ Book book= bookRepository.findNumbering(borrow2.getNumbering()); //通过ISBN找到指定图书信息 books.add(book); } for(Integer i=0;i<books.size();i++){ Long millisecond= (books.get(i).getMax_day())*24*60*60*1000L; //最大借阅时间（毫秒） Long m=millisecond-(date.getTime()-borrows2.get(i).getTime().getTime()); //计算剩余借阅时间 borrows2.get(i).setLastTime(LastTime.calculatingTime(m));//通过静态方法calculatingTime将毫秒转换为天、时、分、秒的格式 } Double[] totalPrices=new Double[books.size()]; for(Integer i=0;i<books.size();i++){ totalPrices[i]=books.get(i).getPrice()*borrows2.get(i).getQuantity(); //计算每本书的总价 } model.addAttribute("books",books); model.addAttribute("borrows2",borrows2); model.addAttribute("totalPrices",totalPrices); return "my_finished"; } @RequestMapping("/history") //用户历史书单 public String borrowHistory(HttpSession session,Model model){ User user=(User)session.getAttribute("loginUser"); List<Borrow> borrows3=borrowRepository.findDelivering(user.getUsername(),4);//已还的书籍 List<Book> books=new ArrayList<>(); for(Borrow borrow3:borrows3){ Book book= bookRepository.findNumbering(borrow3.getNumbering()); //通过ISBN找到指定图书信息 books.add(book); } Double[] totalPrices=new Double[books.size()]; for(Integer i=0;i<books.size();i++){ totalPrices[i]=books.get(i).getPrice()*borrows3.get(i).getQuantity(); //计算每本书的总价 } model.addAttribute("books",books); model.addAttribute("borrows3",borrows3); model.addAttribute("totalPrices",totalPrices); return "history"; } @RequestMapping("/library") //图书馆用户主页 public String immediateDelivery(HttpSession session,Model model){ User user=(User)session.getAttribute("loginUser"); List<DeliveryInfo> libDeliveries=deliveryInfoRepository.findByUsername(user.getUsername()); if(!libDeliveries.isEmpty()) { DeliveryInfo libDelivery = libDeliveries.get(0); model.addAttribute("lib_delivery",libDelivery);//图书馆信息 } List<Book> bks=bookRepository.findByUsername(user.getUsername());//找到指定图书馆的所有图书信息 Integer total=0; for(Book b :bks){ total=total+b.getBw_amount(); //图书馆总借阅量 } List<Borrow> firstBorrows=borrowRepository.findByLibraryType(1); //所有需要配送的信息