springboot整合data-jpa

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1.添加依赖

<!--lombok小工具 -->
<dependency>
   <groupId>org.projectlombok</groupId>
   <artifactId>lombok</artifactId>
</dependency>

<!--mysql依赖-->
<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
</dependency>

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

2.application.properties

#mysql配置
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://***:3306/competition?characterEncoding=utf-8&useSSL=false

#data jpa配置
spring.jpa.show-sql=true

3.entity类

package com.example.competition.dao.entity;

import lombok.Data;
import org.hibernate.annotations.DynamicUpdate;

import javax.persistence.Entity;
import javax.persistence.Id;
import java.util.Date;
@DynamicUpdate
@Entity
@Data
public class Student {
    @Id
    private Integer studentId;

    private String studentNo;

    private String studentName;

    private Integer groupId;

    private Integer studentSpecialtyId;

    private Integer studentGrade;

    private Integer studentStatus;

    private Date createTime;

    private Date updateTime;
}

4.repository

public interface StudentRepository extends JpaRepository<Student, Integer> {

    Page<Student> findByStudentStatus(Pageable pageable, Integer status);

    Student findOne(Integer studentId);
}

5.test

@Autowired
private StudentRepository repository;

@Test
public void findByStudentStatus() {
    PageRequest pageRequest = new PageRequest(0, 10);
    Page<Student> result = repository.findByStudentStatus(pageRequest, 1);
    Assert.assertEquals(1, result.getTotalElements());
}

@Test
public void findOne() {
    Student result = repository.findOne(1);
    System.out.println(result.toString());
}