使用Spring Boot 2.1和Java 8编写SQL原生请求的方法如下:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
@Query
注解来编写SQL原生请求。例如:import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
public interface MyEntityRepository extends JpaRepository<MyEntity, Long> {
@Query(value = "SELECT * FROM my_table WHERE column_name = ?1", nativeQuery = true)
MyEntity findByColumnName(String columnName);
}
在上面的例子中,MyEntity
是实体类,my_table
是数据库表名,column_name
是表的列名。
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class MyEntityService {
private final MyEntityRepository myEntityRepository;
@Autowired
public MyEntityService(MyEntityRepository myEntityRepository) {
this.myEntityRepository = myEntityRepository;
}
public MyEntity findByColumnName(String columnName) {
return myEntityRepository.findByColumnName(columnName);
}
}
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/my-entity")
public class MyEntityController {
private final MyEntityService myEntityService;
@Autowired
public MyEntityController(MyEntityService myEntityService) {
this.myEntityService = myEntityService;
}
@GetMapping("/{columnName}")
public MyEntity findByColumnName(@PathVariable String columnName) {
return myEntityService.findByColumnName(columnName);
}
}
在上面的例子中,/my-entity/{columnName}
是一个GET请求的路径,{columnName}
是一个路径变量。
http://localhost:8080/my-entity/{columnName}
来查找特定列名的实体对象。以上就是使用Spring Boot 2.1和Java 8编写SQL原生请求的基本步骤。关于Spring Boot、Java 8和SQL原生请求的更多详细信息和使用方法,你可以参考腾讯云的相关文档和教程:
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