-图书管理系统后端源码

package com.hlpedu.book.service.impl; import com.hlpedu.book.bo.BorrowBookBo; import com.hlpedu.book.bo.BorrowUserBo; import com.hlpedu.book.mapper.BorrowMapper; import com.hlpedu.book.pojo.Book; import com.hlpedu.book.pojo.Borrow; import com.hlpedu.book.pojo.User; import com.hlpedu.book.service.BookService; import com.hlpedu.book.service.BorrowService; import com.hlpedu.book.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class BorrowServiceImpl implements BorrowService { @Autowired BorrowMapper borrowMapper; @Autowired BookService bookService; @Autowired UserService userService; @Override public List countBorrowBo() { List list= borrowMapper.countBorrowBo(); return list; } @Override public List countBorrowUserBo() { List list= borrowMapper.countBorrowUserBo(); return list; } // 统计借阅信息记录 @Override public int countBorrow(String uname, String bname) { return borrowMapper.countBorrow(uname,bname); } // 分页查询借阅信息 @Override public List listPageBorrow(Integer page, Integer rows, String uname, String bname) { return borrowMapper.listPageBorrow((page-1)*rows,rows,uname,bname); } // 统计归还信息记录 @Override public int countHistoryBorrow(String uname, String bname) { return borrowMapper.countHistoryBorrow(uname,bname); } // 分页查询归还信息 @Override public List listPageHistoryBorrow(Integer page, Integer size, String uname, String bname) { return borrowMapper.listPageHistoryBorrow((page-1)*size,size,uname,bname); } // 新增图书借阅信息 @Override public void saveBorrowBooks(Borrow borrow) { System.out.println(borrow.getBook().getBid()+"-----"); //图书ID，通过获得借阅图书库存 Book book = bookService.findBookById(borrow.getBook().getBid()); User user=userService.findUserById(borrow.getUser().getUid()); if (book != null){ if (book.getQuantity() > 0 && book.getQuantity() >= borrow.getQuantity()&& user.getStats()==0){ //借阅图书库存减一 book.setQuantity(book.getQuantity() - borrow.getQuantity()); bookService.updateBook(book); borrow.setBook(book); System.out.println(borrow.getUser().getUid()); // User user=userService.findUserById(borrow.getUser().getUid()); // System.out.println(borrow.getUser().getUname()); // User user = userService.findUserByUname(borrow.getUser().getUname()); borrow.setUser(user); } } //借阅图书信息入库 borrowMapper.saveBorrow(borrow); // //1.查询图书信息 // book = bookService.findBookById(book.getBid()); // //2.新增图书借阅信息 // //如果借阅数量小于等于馆藏图书的数量，则更新馆藏图书数量和借阅数量 // if(borrow.getQuantity() <= book.getQuantity()){ // //2.1 更新馆藏图书数量 =馆藏图书数量-借阅数量 // book.setQuantity(book.getQuantity()-borrow.getQuantity()); // //更新馆藏图书信息 // bookService.changStore(book); // } // //添加图书借阅信息 // borrow.setBook(book); } //归还图书 @Override public void backBooksBorrow(Integer boid) { //1.根据boid查询借阅信息 Borrow borrow = getBorrowByBoid(boid); //2.根据图书bid查询图书信息 Book book = bookService.findBookById(borrow.getBook().getBid()); //3.最终归还图书，在图书数量上加上借阅的数量 book.setQuantity(book.getQuantity()+borrow.getQuantity()); bookService.changStore(book); borrow.setStats(1);//更改借阅状态 borrowMapper.updateBorrow(borrow); } //根据boid查询借阅信息 private Borrow getBorrowByBoid(Integer boid) { return borrowMapper.findBorrowByBoid(boid); } }