JPA如何仅更新实体中的特定字段

Question

我有一个像下面的DTO

import com.fasterxml.jackson.annotation.JsonIgnore;

/**
 * Simple DTO for ServiceContract.
 */
public class ServiceContractDTO {
    public Long id;
    public String name;
    public String description;
    public String type;
    public Long contractStart;
    public Long contractEnd;
    public Boolean isrepeated;
    public Boolean autoApproved;
    public Boolean staffAutoApproved;
    public Long createdts;
    public Long updatedts;
    public String createdby;
    public String status;

    public HospitalDTO hospital;
    public HospitalUnitDTO unit;
    public StaffDTO preferredStaff;
    public SpecialtyDTO specialty;
    public SkillMasterDTO skill;

    public ServiceLocationDTO serviceLocation;
    public ServiceScheduleDTO serviceSchedule;

    @JsonIgnore
    public boolean isIdSet() {
        return id != null;
    }
}

现在，如果更新，我只能从UI获取空字段。如何仅设置这些并更新对象。我不想为所有这些属性检查null并设置它们。有更好的方法吗？

我会得到一个喜欢

的json

{
        "id": 13,
        "name": "test contract"
}

任何代码示例都有帮助