实体类
import java.math.BigDecimal; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Index; import javax.persistence.Table; import lombok.Data; @Data @Entity @Table(name = "tb_student", indexes = { @Index(name = "index_tb_student", columnList = "classNo,studentName"), @Index(name = "index_student_studentName", columnList = "studentName"), @Index(name = "index_student_studentAge", columnList = "studentAge") }) public class Student { @Id private String studentId; @Column private String studentName; @Column private Integer studentAge; @Column private String classNo; @Column(precision = 18, scale = 4) private BigDecimal height; @Column private Date lastModiftyDate; @Column private String classId; //手动维护tb_class表和tb_student之间的关系 }
Service层
import java.util.List; public interface StudentService { void saveAll(List<Student> students); void deleteAll(List<Student> students); }
import java.util.List; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import org.springframework.stereotype.Service; @Service public class StudentServiceImpl implements StudentService { @PersistenceContext private EntityManager entityManager; @Override public void saveAll(List<Student> students) { for (Student student : students) { entityManager.persist(student); } } @Override public void deleteAll(List<Student> students) { for (Student student : students) { entityManager.remove(student); } } }