SpringBoot+Spring Data JPA

1. 添加起步依赖

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<!-- 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

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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

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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

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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

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public interface StudentService {       Student save(Student student);   }

　　

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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

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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();     } }