為什么我不能將 JSON (GSON) 日期格式從改造請求正文轉換為 java 對象？

Question

我正在將請求正文從 Android（改造）發送到服務器（由 JAVA/JERSEY/JACKSON 支持）。 我正在通過攔截器記錄請求正文，它看起來像什么

{"workId":"456655","workName":"some work","workOrderDate":"Jan 29, 2020 12:00:00 AM"}

在服務器端，我的Project對象能夠解析除"workOrderDate"之外的每個字段。 我嘗試使用更改各種類型的 Gson 日期格式

Gson gson = new GsonBuilder() .setDateFormat("yyyy-MM-dd") .create();

但仍然是 JSON，格式沒有改變（2020 年 1 月 29 日 12:00:00 AM）並且它沒有分配給服務器端Project對象的"workOrderDate"字段。

服務器端的對象-

public class Project implements Serializable {

private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "project_id")
private Integer projectId;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 200)
@Column(name = "work_name")
private String workName;
@Basic(optional = false)
@NotNull
@Lob
@Size(min = 1, max = 2147483647)
@Column(name = "work_description")
private String workDescription;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 45)
@Column(name = "consignee_work_order")
private String consigneeWorkOrder;
@Basic(optional = false)
@NotNull
@Column(name = "work_order_date")
@Temporal(TemporalType.DATE)
private Date workOrderDate;
@Size(max = 45)
@Column(name = "consignee")
private String consignee;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 45)
@Column(name = "sent_by")
private String sentBy;
@Size(max = 45)
@Column(name = "chargeable_head")
private String chargeableHead;
@Size(max = 45)
@Column(name = "account_unit")
private String accountUnit;
@Size(max = 45)
@Column(name = "fund_exist")
private String fundExist;
@Size(max = 45)
@Column(name = "fund_certificate")
private String fundCertificate;
// @Max(value=?)  @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Column(name = "approx_cost")
private Double approxCost;
@Column(name = "approx_weight")
private Double approxWeight;
@Size(max = 200)
@Column(name = "drawing")
private String drawing;
@Size(max = 45)
@Column(name = "required_at")
private String requiredAt;
@Lob
@Size(max = 2147483647)
@Column(name = "remark1")
private String remark1;
@Lob
@Size(max = 2147483647)
@Column(name = "remark2")
private String remark2;
@Lob
@Size(max = 2147483647)
@Column(name = "remark3")
private String remark3;
@JoinColumn(name = "division", referencedColumnName = "division_id")
@ManyToOne(optional = false)
private Division division;

public Project() {
}

public Project(Integer projectId) {
    this.projectId = projectId;
}

public Project(Integer projectId, String workName, String workDescription, String consigneeWorkOrder, Date workOrderDate, String sentBy) {
    this.projectId = projectId;
    this.workName = workName;
    this.workDescription = workDescription;
    this.consigneeWorkOrder = consigneeWorkOrder;
    this.workOrderDate = workOrderDate;
    this.sentBy = sentBy;
}

public Integer getProjectId() {
    return projectId;
}

public void setProjectId(Integer projectId) {
    this.projectId = projectId;
}

public String getWorkName() {
    return workName;
}

public void setWorkName(String workName) {
    this.workName = workName;
}

public String getWorkDescription() {
    return workDescription;
}

public void setWorkDescription(String workDescription) {
    this.workDescription = workDescription;
}

public String getConsigneeWorkOrder() {
    return consigneeWorkOrder;
}

public void setConsigneeWorkOrder(String consigneeWorkOrder) {
    this.consigneeWorkOrder = consigneeWorkOrder;
}

public Date getWorkOrderDate() {
    return workOrderDate;
}

public void setWorkOrderDate(Date workOrderDate) {
    this.workOrderDate = workOrderDate;
}

public String getConsignee() {
    return consignee;
}

public void setConsignee(String consignee) {
    this.consignee = consignee;
}

public String getSentBy() {
    return sentBy;
}

public void setSentBy(String sentBy) {
    this.sentBy = sentBy;
}

public String getChargeableHead() {
    return chargeableHead;
}

public void setChargeableHead(String chargeableHead) {
    this.chargeableHead = chargeableHead;
}

public String getAccountUnit() {
    return accountUnit;
}

public void setAccountUnit(String accountUnit) {
    this.accountUnit = accountUnit;
}

public String getFundExist() {
    return fundExist;
}

public void setFundExist(String fundExist) {
    this.fundExist = fundExist;
}

public String getFundCertificate() {
    return fundCertificate;
}

public void setFundCertificate(String fundCertificate) {
    this.fundCertificate = fundCertificate;
}

public Double getApproxCost() {
    return approxCost;
}

public void setApproxCost(Double approxCost) {
    this.approxCost = approxCost;
}

public Double getApproxWeight() {
    return approxWeight;
}

public void setApproxWeight(Double approxWeight) {
    this.approxWeight = approxWeight;
}

public String getDrawing() {
    return drawing;
}

public void setDrawing(String drawing) {
    this.drawing = drawing;
}

public String getRequiredAt() {
    return requiredAt;
}

public void setRequiredAt(String requiredAt) {
    this.requiredAt = requiredAt;
}

public String getRemark1() {
    return remark1;
}

public void setRemark1(String remark1) {
    this.remark1 = remark1;
}

public String getRemark2() {
    return remark2;
}

public void setRemark2(String remark2) {
    this.remark2 = remark2;
}

public String getRemark3() {
    return remark3;
}

public void setRemark3(String remark3) {
    this.remark3 = remark3;
}

public Division getDivision() {
    return division;
}

public void setDivision(Division division) {
    this.division = division;
}

@Override
public int hashCode() {
    int hash = 0;
    hash += (projectId != null ? projectId.hashCode() : 0);
    return hash;
}

@Override
public boolean equals(Object object) {
    // TODO: Warning - this method won't work in the case the id fields are not set
    if (!(object instanceof Project)) {
        return false;
    }
    Project other = (Project) object;
    if ((this.projectId == null && other.projectId != null) || (this.projectId != null && !this.projectId.equals(other.projectId))) {
        return false;
    }
    return true;
}

@Override
public String toString() {
    return "com.nrbwlko.officeprojectmaven1.Project[ projectId=" + projectId + " ]";
}

}

安卓端

public class PojoProject {
private Integer projectId;
private String workName;
private String workDescription;
private String consigneeWorkOrder;   
private Date workOrderDate;
private String consignee;
private String sentBy;
private String chargeableHead;
private String accountUnit;
private String fundExist;
private String fundCertificate;
private Double approxCost;
private Double approxWeight;
private String drawing;
private String requiredAt;
private String remark1;
private String remark2;
private String remark3;
private PojoDivision division;

public PojoProject(String workName, String workDescription, String consigneeWorkOrder, Date workOrderDate, String consignee, String sentBy, String chargeableHead, String accountUnit, PojoDivision division) {
    this.workName = workName;
    this.workDescription = workDescription;
    this.consigneeWorkOrder = consigneeWorkOrder;
    this.workOrderDate = workOrderDate;
    this.consignee = consignee;
    this.sentBy = sentBy;
    this.chargeableHead = chargeableHead;
    this.accountUnit = accountUnit;
    this.division = division;
}

public Integer getProjectId() {
    return projectId;
}

public void setProjectId(Integer projectId) {
    this.projectId = projectId;
}

public String getWorkName() {
    return workName;
}

public void setWorkName(String workName) {
    this.workName = workName;
}

public String getWorkDescription() {
    return workDescription;
}

public void setWorkDescription(String workDescription) {
    this.workDescription = workDescription;
}

public String getConsigneeWorkOrder() {
    return consigneeWorkOrder;
}

public void setConsigneeWorkOrder(String consigneeWorkOrder) {
    this.consigneeWorkOrder = consigneeWorkOrder;
}

public Date getWorkOrderDate() {
    return workOrderDate;
}

public void setWorkOrderDate(Date workOrderDate) {
    this.workOrderDate = workOrderDate;
}

public String getConsignee() {
    return consignee;
}

public void setConsignee(String consignee) {
    this.consignee = consignee;
}

public String getSentBy() {
    return sentBy;
}

public void setSentBy(String sentBy) {
    this.sentBy = sentBy;
}

public String getChargeableHead() {
    return chargeableHead;
}

public void setChargeableHead(String chargeableHead) {
    this.chargeableHead = chargeableHead;
}

public String getAccountUnit() {
    return accountUnit;
}

public void setAccountUnit(String accountUnit) {
    this.accountUnit = accountUnit;
}

public String getFundExist() {
    return fundExist;
}

public void setFundExist(String fundExist) {
    this.fundExist = fundExist;
}

public String getFundCertificate() {
    return fundCertificate;
}

public void setFundCertificate(String fundCertificate) {
    this.fundCertificate = fundCertificate;
}

public Double getApproxCost() {
    return approxCost;
}

public void setApproxCost(Double approxCost) {
    this.approxCost = approxCost;
}

public Double getApproxWeight() {
    return approxWeight;
}

public void setApproxWeight(Double approxWeight) {
    this.approxWeight = approxWeight;
}

public String getDrawing() {
    return drawing;
}

public void setDrawing(String drawing) {
    this.drawing = drawing;
}

public String getRequiredAt() {
    return requiredAt;
}

public void setRequiredAt(String requiredAt) {
    this.requiredAt = requiredAt;
}

public String getRemark1() {
    return remark1;
}

public void setRemark1(String remark1) {
    this.remark1 = remark1;
}

public String getRemark2() {
    return remark2;
}

public void setRemark2(String remark2) {
    this.remark2 = remark2;
}

public String getRemark3() {
    return remark3;
}

public void setRemark3(String remark3) {
    this.remark3 = remark3;
}

public PojoDivision getDivision() {
    return division;
}

public void setDivision(PojoDivision division) {
    this.division = division;
}

}

從 ViewModel 觸發調用服務器端的方法 -

public void save() {
    System.out.println(workDate.getValue());
    Date workorderDate = getWorkDateFromString(workDate.getValue());

    PojoProject project = new PojoProject(workName.getValue(), workDescription.getValue(), workOrder.getValue(), workorderDate, consignee.getValue(), sentBy.getValue(), chargeableHead.getValue(), accountUnit.getValue(), selectedDivision.getValue());


    projectRepository.saveProject(project);

}

這是我的服務器端 Rest End Point，我將 JSON 收集到Project()對象中並保存到數據庫中——

@POST
@AnnotationSecured
@Path("saveProject")
@Consumes(MediaType.APPLICATION_JSON)
// @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public void saveNewProject(Project newProject) {
    System.out.println("inside save new project");
    if (newProject.getWorkOrderDate() == null) {
        System.out.println("date is null");
    } else {
        System.out.println("date is  " + newProject.getWorkOrderDate().toString());
    }
    Project project = null;
    EntityManager em = UtilityJPA.getEntityManager();
    EntityTransaction transaction = em.getTransaction();
    try {
        transaction.begin();
        em.persist(newProject);
        transaction.commit();
    } catch (Exception ex) {
        if (em.getTransaction().isActive()) {
            em.getTransaction().rollback();
        }

    } finally {
        em.clear();
    }

}

}

Answer 1

您應該嘗試使用DateFormat.FULL 。 像這樣對我來說很好用

Gson gson = new GsonBuilder().setDateFormat(DateFormat.FULL).create();