用@GetMapping返回Json

Question

我想从嵌套的Entity类返回一个json。

能够使用@PostMapping值提交到mysql数据库。我有3个实体Plate，Sample和Submission，它们具有@ManyToOne和@OneToMany的关系。一旦我提交了，问题就是从数据库中以json的形式检索相同的数据

这是我的实体

public class Sample {
    @Id
    @GeneratedValue(strategy=GenerationType.TABLE, generator="tab")
    private Long id;
    private String row;
    private String clientSampleId;
    private String comments;
    private String organismName;
    private Long columnNumber;
    private String tissueType;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="plate_id")
    private Plate plate;

}

public class Plate {
    @Id
    @GeneratedValue(strategy=GenerationType.TABLE, generator="tab")
    private Long id;
    private String clientPlateId;
    private String clientPlateBarcode;
    private String sampleSubmissionFormat;
    @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="plate")
    private List<Sample> samples;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="submission_id")
    private Submission submission;
}

public class Submission {
    @Id
    @GeneratedValue(strategy=GenerationType.TABLE, generator="tab")
    private Long id;

    private Long numberOfSamples;
    private String sampleType;
    private String clientId;
    @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="submission")
    private List<Plate> plates;
}

尝试检索带有submissionId键的提交，它返回一个 com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields异常。

@GetMapping(value = "/submission/{submissionId}", produces = { "application/json" })
    public Submission getSubmission(@PathVariable(value = "submissionId") Long submissionId) {

return submissionRepository.findById(submissionId);

}

这是我的json提交文件，应该与@GetMapping请求相同

{
    "plates": [

        {
            "clientPlateId": "P_2519052917_1",
            "clientPlateBarcode": "P_2519052917_1",
            "samples": [
                {
                    "row": "A",
                    "clientSampleId": "1737",
                    "comments": "none",
                    "organismName": "Wheat",
                    "columnNumber": 1,
                    "tissueType": "leaf"
                }
            ],
            "sampleSubmissionFormat": "PLATE_96"
        }
    ],
    "numberOfSamples": 94,
    "sampleType": "DNA",
    "clientId": "cleintid"
}