警告?。。L;DRMySQL 5.6.39  mysql:mysql-connector-java:5.1.27org.hibernate.common:hibernate-commons-annotations:4.0.5.Final  org.hibernate.javax.persistence:hibernate-jpa-2.1-api:1.0.0.Final  org.hibernate:hibernate-core:4.3.6.Finalorg.hibernate:hibernate-entitymanager:4.3.6.Final  org.hibernate:hibernate-validator:5.0.3.FinalHTTP 方法： POST， API 路徑： /reader實(shí)體“閱讀器”引擎：innoDBidnametotal_pages_read類映射：@Entity@Table(name = "reader")public class Reader{    @Column(name = "id")    private Long id;    @Column(name = "name")    private String name;    @Column(name = "total_pages_read")    private Long total_pages_read;        @OneToMany(fetch = FetchType.LAZY, mappedBy = "reader", orphanRemoval = true)    private Set<Book_read> book_reads;    ...}我使用方法 createEntity（） 并在 Reader write service 類中重新計(jì)算 TotaltalPageRead（）：@Servicepublic class ReaderWritePlatformServiceJpaRepositoryImpl{    private final ReaderRepositoryWrapper readerRepositoryWrapper;       ...    @Transactional    public Long createEntity(final Long id, final String name, final Long total_pages_read){        try {            final Reader reader = new Reader(id, name, total_pages_read);            this.readerRepositoryWrapper.saveAndFlush(reader);            return 1l;        } catch (final Exception e) {            return 0l;        }    }        ...}HTTP 方法： POST， API 路徑： /bookread實(shí)體“book_read”引擎：innoDBid  reader_id  book_title  number_of_pages 類映射：@Entity@Table(name = "book_read")public class Book_read{    @Column(name = "id")    private Long id;    @ManyToOne(fetch = FetchType.LAZY)    @JoinColumn(name = "reader_id")    private Reader reader;    @Column(name = "book_title")    private String book_title;    @Column(name = "number_of_pages")    private Long number_of_pages;        ...}