基于Servlet+Thymeleaf+Mybatis的图书管理系统.zip

package com.book.service.impl; import com.book.dao.BookMapper; import com.book.dao.StudentMapper; import com.book.dao.UserMapper; import com.book.entity.Book; import com.book.entity.Borrow; import com.book.entity.Student; import com.book.entity.User; import com.book.service.BookService; import com.book.utils.MybatisUtil; import org.apache.ibatis.session.SqlSession; import java.util.*; import java.util.stream.Collectors; public class BookServiceImpl implements BookService { @Override public List<Borrow> getBorrowList() { try (SqlSession sqlSession = MybatisUtil.getSession()){ BookMapper mapper = sqlSession.getMapper(BookMapper.class); return mapper.getBorrowList(); } } @Override public void returnBook(String id) { try (SqlSession sqlSession = MybatisUtil.getSession()){ BookMapper mapper = sqlSession.getMapper(BookMapper.class); mapper.deleteBorrow(id); } } @Override public List<Book> getActiveBookList() { Set<Integer> set = new HashSet<>(); this.getBorrowList().forEach(borrow -> set.add(borrow.getBook_id())); try (SqlSession sqlSession = MybatisUtil.getSession()){ BookMapper mapper = sqlSession.getMapper(BookMapper.class); return mapper.getBookList() .stream() .filter(book -> !set.contains(book.getBid())) .collect(Collectors.toList()); } } @Override public Map<Book, Boolean> getBookList() { Set<Integer> set = new HashSet<>(); this.getBorrowList().forEach(borrow -> set.add(borrow.getBook_id())); try (SqlSession sqlSession = MybatisUtil.getSession()){ Map<Book, Boolean> map = new LinkedHashMap<>(); BookMapper mapper = sqlSession.getMapper(BookMapper.class); mapper.getBookList().forEach(book -> map.put(book, set.contains(book.getBid()))); return map; } } @Override public List<Student> getStudentList() { try (SqlSession sqlSession = MybatisUtil.getSession()){ StudentMapper mapper = sqlSession.getMapper(StudentMapper.class); return mapper.getStudentList(); } } @Override public void addBorrow(int sid, int bid) { try (SqlSession sqlSession = MybatisUtil.getSession()){ BookMapper mapper = sqlSession.getMapper(BookMapper.class); mapper.addBorrow(sid, bid); } } @Override public void deleteBook(int bid) { try (SqlSession sqlSession = MybatisUtil.getSession()){ BookMapper mapper = sqlSession.getMapper(BookMapper.class); mapper.deleteBook(bid); } } @Override public void addBook(String title, String desc, double price) { try (SqlSession sqlSession = MybatisUtil.getSession()){ BookMapper mapper = sqlSession.getMapper(BookMapper.class); mapper.addBook(title, desc, price); } } }