基于springboot+vue的图书管理系统源码+数据库.zip

package com.dongliu.service.impl; import com.dongliu.dao.BookDao; import com.dongliu.dao.LentRecordDao; import com.dongliu.dao.UserDao; import com.dongliu.domain.Book; import com.dongliu.domain.LentRecord; import com.dongliu.domain.User; import com.dongliu.service.LentRecordService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.Date; import java.util.List; @Service public class LentRecordServiceImpl implements LentRecordService { @Autowired private LentRecordDao lentRecordDao; @Autowired private BookDao bookDao; @Autowired private UserDao userDao; public boolean save(LentRecord lentRecord) { return lentRecordDao.save(lentRecord) > 0; } public boolean update(LentRecord lentRecord) { return lentRecordDao.update(lentRecord) > 0; } public boolean delete(Integer lentId) { return lentRecordDao.delete(lentId) > 0; } public List<LentRecord> getByUsername(String username) { return lentRecordDao.getByUsername(username); } public LentRecord getByLentId(Integer lentId){ return lentRecordDao.getByLentId(lentId); } public List<LentRecord> getAll() { return lentRecordDao.getAll(); } public int getCount(){ return lentRecordDao.getCount(); } public boolean createRecord(Book book, User user){ try { LentRecord lentRecord = new LentRecord(); int lentNumber = book.getLentNumber(); lentNumber++; book.setLentNumber(lentNumber); bookDao.update(book); int lentNumber2 = user.getLentNumber(); lentNumber2++; user.setLentNumber(lentNumber2); userDao.updateById(user); lentRecord.setBookId(book.getId()); lentRecord.setBookName(book.getName()); lentRecord.setUsername(user.getUsername()); lentRecord.setName(user.getName()); lentRecord.setLentDate(new Date()); return lentRecordDao.save(lentRecord) > 0; }catch (Exception e){ System.out.println("创建借书记录出错！"); } return false; } public List<LentRecord> getAllByUsername(String username) { return lentRecordDao.getAllByUsername(username); } public List<LentRecord> getNotReturnByUsername(String username) { return lentRecordDao.getNotReturnByUsername(username); } public LentRecord returnBook(LentRecord lentRecord) { Date date = new Date(); // 还书要扣钱 int days = (int)Math.ceil(((date.getTime() - lentRecord.getLentDate().getTime()) / (1.0*1000*3600*24))); lentRecord.setReturnDate(date); User user = userDao.getByUsername(lentRecord.getUsername()); float bill = (float) (0.1*days); float money = (float) (user.getMoney()-bill); user.setMoney(money); // 已借数量-- user.setLentNumber(user.getLentNumber()-1); userDao.update(user); lentRecord.setBill(bill); lentRecordDao.update(lentRecord); // 书已借数量-- Book book = bookDao.getById(lentRecord.getBookId()); book.setLentNumber(book.getLentNumber()-1); bookDao.update(book); boolean flag = lentRecordDao.update(lentRecord) > 0; return flag ? lentRecord : null; } }