SpringBoot 使用JPA+MySQL+Thymeleaf 总结 二

1. SpringBoot 使用JPA+MySQL+Thymeleaf 总结 一
2. SpringBoot 使用JPA+MySQL+Thymeleaf 总结 二

方法一

使用原生sql查询 或者 为方法名增加 Pageable参数

import  org.springframework.data.domain.Pageable;

public interface BookQueryRepository extends Repository<Book, Long> {
    
    //原生的sql语句,要使用数据表名
    @Query(value = "select * from tb_book b where b.name=?1", nativeQuery = true) 
    List<Book> findByName(String name);
    
    //基础查询  重要说明 JPA规范中的定义JPQL是不能使用星号(*)来查询的
    @Query(value = "select name,author,price from Book b where b.price>?1 and b.price<?2")
    List<Book> findByPriceRange(long price1, long price2);
    
　　 @Query("select t from Book t")
    List<Book> findAllBook1();

   @Query("select * from book " , nativeQuery = true)
    List<Book> findAllBook2();

//Like表达式
    @Query(value = "select name,author,price from Book b where b.name like %:name%")
    List<Book> findByNameMatch(@Param("name") String name);

    //使用@Param注解注入参数
    @Query(value = "select name,author,price from Book b where b.name = :name AND b.author=:author AND b.price=:price")
    List<Book> findByNamedParam(@Param("name") String name, @Param("author") String author,
            @Param("price") long price);
    
    //分页查询 原生sql语句
    @Query(value = "SELECT * FROM tb_book WHERE name = ?1",
    countQuery = "SELECT count(*) FROM tb_book WHERE name = ?1",
    nativeQuery = true)
    Page<Book> findByName(String name, Pageable pageable);

    //分页查询
    @Query("select name,author,price from Book b where b.name=?")
    public List<Book> findByNamePaged(String certNum,Pageable pageable);
}

业务层调用

public class BookService {

    @Autowired
    private BookQueryRepository bookQueryDao;
    public Page<Book> getBook(int pageNumber,int pageSize){
        PageRequest request = this.buildPageRequest(pageNumber,pageSize);
        Page<Book> result= bookQueryDao.findByName("123123",request);
        return result;
    }
    
　　//构建PageRequest
    private PageRequest buildPageRequest(int pageNumber, int pagzSize) {
        return new PageRequest(pageNumber - 1, pagzSize, null);
    }
}

方法二

直接使用 PagingAndSortingRepository

import org.springframework.data.repository.PagingAndSortingRepository;

public interface BookQueryRepository extends PagingAndSortingRepository<Book, String> {

}

业务层调用

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;

public class BookService {

    @Autowired
    private BookQueryRepository bookQueryDao;
    public Page<Book> getBook(int pageNumber,int pageSize){
        PageRequest request = this.buildPageRequest(pageNumber,pageSize);
        Page<Book> result= bookQueryDao.findAll(request);
        return result;
    }
    
　　//构建PageRequest
    private PageRequest buildPageRequest(int pageNumber, int pagzSize) {
        return new PageRequest(pageNumber - 1, pagzSize, null);
    }
}