使用manytoone和onetomany查询不出关联表对应的数据

Question

使用manytoone和onetomany查询不出关联表对应的数据

 @ManyToOne
    @JsonIgnoreProperties(value = {"paperWeights"})
    @JoinColumn(name = "paperId")
    private ExamPaper examPaper;


//有很多个list
    @OneToMany
    @JsonIgnoreProperties(value = {"examPaper"})
    private List<ExamPaperWeight> paperWeights;

 ExamPaper dept = examPaperDAO.findBypaperIdLikeAndvalid(Integer.parseInt(paperId),true);
        List<ExamPaper> end=examPaperDAO.findAll();
        System.out.println(end);

查询出的结果里边paperWeights就是空的

请各位解答