SpringBoot 集成Spring Data JPA

1. 添加起步依赖

<!-- spring data jpa起步依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

2.配置文件

配置项参考 SpringBoot+JPA初始化数据库表

spring.jpa.hibernate.ddl-auto=update
#spring.jpa.show-sql=true
#spring.jpa.generate-ddl=true

3. 建实体类  运行项目 就会在数据库中自动建表t_student 

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;


@Entity
@Table(name = "t_student")
public class Student {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column
    private String name;

    @Column
    private String homeAddress;

    private Long homeTel;
    

}

4.建repository

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.stereotype.Repository;


@Repository
public interface StudentRepository extends JpaRepository<Student, Long>,JpaSpecificationExecutor<Student> {

}

5.建service

public interface StudentService {

	Student save(Student student);

}

　　

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class StudentServiceImpl implements StudentService {

	@Autowired
	private StudentRepository studentRepository;

	@Override
	public Student save(Student student) {

		return studentRepository.save(student);

	}

}

6.建controller  运行项目，调用方法saveStudent就可以实现 持久化student对象到数据库

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

@RequestMapping("/api")
@RestController
public class StudentController {
	
	@Autowired
	private StudentService studentService;

	@PostMapping("/students")
	@ResponseBody
	public String saveStudent(@RequestBody Student student) {
		Student savestudent = studentService.save(student);
		return savestudent.getName();
	}
}