80 lines
2.3 KiB
Java
80 lines
2.3 KiB
Java
package com.guwan.backend.service.impl;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.guwan.backend.entity.Book;
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import com.guwan.backend.mapper.BookMapper;
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import com.guwan.backend.service.BookService;
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import com.mongoplus.conditions.query.LambdaQueryChainWrapper;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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@Slf4j
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@Service
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@RequiredArgsConstructor
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public class BookServiceImpl implements BookService {
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private final BookMapper bookMapper;
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@Override
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@Transactional
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public Book addBook(Book book) {
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// new LambdaQueryWrapper<>()
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// new LambdaQueryChainWrapper<>()
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bookMapper.insert(book);
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return book;
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}
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@Override
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@Transactional
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public Book updateBook(Book book) {
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bookMapper.updateById(book);
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return book;
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}
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@Override
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@Transactional
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public void deleteBook(Long id) {
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bookMapper.deleteById(id);
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}
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@Override
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public Book getBookById(Long id) {
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return bookMapper.selectById(id);
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}
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@Override
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public Book getBookByIsbn(String isbn) {
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return bookMapper.selectOne(
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new LambdaQueryWrapper<Book>()
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.eq(Book::getIsbn, isbn)
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);
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}
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@Override
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public IPage<Book> getBookList(Integer pageNum, Integer pageSize, String keyword) {
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LambdaQueryWrapper<Book> wrapper = new LambdaQueryWrapper<>();
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if (keyword != null && !keyword.isEmpty()) {
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wrapper.like(Book::getTitle, keyword)
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.or()
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.like(Book::getAuthor, keyword)
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.or()
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.like(Book::getDescription, keyword);
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}
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return bookMapper.selectPage(new Page<>(pageNum, pageSize), wrapper);
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}
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@Override
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public IPage<Book> getBooksByCategory(String category, Integer pageNum, Integer pageSize) {
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LambdaQueryWrapper<Book> wrapper = new LambdaQueryWrapper<>();
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wrapper.eq(Book::getCategory, category);
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return bookMapper.selectPage(new Page<>(pageNum, pageSize), wrapper);
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}
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} |