Question

我的java pojo类是

public class Task implements java.io.Serializable {

private Integer id;
private Date startDate;
private Date endDate;
private Integer priority;
private Double duration;
private Integer percentDone;
private String durationUnit;
private Integer parentId;
private String taskName;
private Integer taskindex;
private Integer depth;

public Task() {
}

public Task(Date startDate, Date endDate, Integer priority,
        Double duration, Integer percentDone, String durationUnit,
        Integer parentId, String taskName, Integer taskindex, Integer depth) {
    this.startDate = startDate;
    this.endDate = endDate;
    this.priority = priority;
    this.duration = duration;
    this.percentDone = percentDone;
    this.durationUnit = durationUnit;
    this.parentId = parentId;
    this.taskName = taskName;
    this.taskindex = taskindex;
    this.depth = depth;
}

@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "Id", unique = true, nullable = false)
public Integer getId() {
    return this.id;
}

public void setId(Integer id) {
    this.id = id;
}

@Temporal(TemporalType.DATE)
@Column(name = "StartDate", length = 10)
public Date getStartDate() {
    return this.startDate;
}

public void setStartDate(Date startDate) {
    this.startDate = startDate;
}

@Temporal(TemporalType.DATE)
@Column(name = "EndDate", length = 10)
public Date getEndDate() {
    return this.endDate;
}

public void setEndDate(Date endDate) {
    this.endDate = endDate;
}

@Column(name = "Priority")
public Integer getPriority() {
    return this.priority;
}

public void setPriority(Integer priority) {
    this.priority = priority;
}

@Column(name = "Duration", precision = 22, scale = 0)
public Double getDuration() {
    return this.duration;
}

public void setDuration(Double duration) {
    this.duration = duration;
}

@Column(name = "PercentDone")
public Integer getPercentDone() {
    return this.percentDone;
}

public void setPercentDone(Integer percentDone) {
    this.percentDone = percentDone;
}

@Column(name = "DurationUnit", length = 20)
public String getDurationUnit() {
    return this.durationUnit;
}

public void setDurationUnit(String durationUnit) {
    this.durationUnit = durationUnit;
}

@Column(name = "parentId")
public Integer getParentId() {
    return this.parentId;
}

public void setParentId(Integer parentId) {
    this.parentId = parentId;
}

@Column(name = "TaskName")
public String getTaskName() {
    return this.taskName;
}

public void setTaskName(String taskName) {
    this.taskName = taskName;
}

@Column(name = "Taskindex")
public Integer getTaskindex() {
    return this.taskindex;
}

public void setTaskindex(Integer taskindex) {
    this.taskindex = taskindex;
}

@Column(name = "depth")
public Integer getDepth() {
    return this.depth;
}

public void setDepth(Integer depth) {
    this.depth = depth;
}

我的util将把我的jsonObject中的值赋给Pojo

JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(new String[] {"yyyy-MM-dd'T'HH:mm:ss"}));
    JSONObject jsonObject = JSONObject.fromObject(data);
    System.out.println("JSON OBJECT VALUE FOR PARENTID ::"+jsonObject.get("parentId"));

    jsonObject.put("taskName", jsonObject.getString("Name"));
    jsonObject.put("startDate", jsonObject.get("StartDate"));
    jsonObject.put("endDate", jsonObject.get("EndDate"));
    jsonObject.put("duration", jsonObject.getInt("Duration"));
    jsonObject.put("durationUnit", jsonObject.getString("DurationUnit"));
    jsonObject.put("percentDone", jsonObject.getInt("PercentDone"));
    jsonObject.put("priority", jsonObject.getInt("Priority"));



    jsonObject.put("parentId", jsonObject.getInt("parentId"));
    jsonObject.put("taskindex", jsonObject.getInt("index"));
    jsonObject.put("depth", jsonObject.getInt("depth"));

    jsonObject.remove("Id");
    jsonObject.remove("ManuallyScheduled");
    jsonObject.remove("checked");
    jsonObject.remove("Name");
    jsonObject.remove("StartDate");
    jsonObject.remove("EndDate");
    jsonObject.remove("Duration");
    jsonObject.remove("DurationUnit");
    jsonObject.remove("PercentDone");
    jsonObject.remove("Priority");
    jsonObject.remove("index");

    System.out.println("JSON OBJECT ::"+jsonObject);

    Task newTask = (Task) JSONObject.toBean(jsonObject, Task.class);

我收到的服务器端的jsonObject是

{
"parentId": 0,
"depth": 1,
"taskName": "New Task",
"startDate": "2012-01-30T00:00:00",
"endDate": "2012-01-31T00:00:00",
"duration": 1,
"durationUnit": "d",
"percentDone": 60,
"priority": 1,
"taskindex": 5 }

不知道为什么我无法将startDate分配给我的startDate POJO对象。

当我删除 JSONUtils.getMorpherRegistry（）。registerMorpher（new DateMorpher（new String [] {“yyyy-MM-dd'T'HH：mm：ss”}））; < / p>

将值分配给我的POJO对象，一切正常，但startDate更改为当前日期，然后分配。而且我正在向我的服务器端发出警告

WARNING: Can't transform property 'startDate' from java.lang.String into java.util.Date. Will register a default Morpher INFO: Property 'java.util.Date.class' has no write method. SKIPPED. WARNING: Property 'java.lang.String.date' does not exist. SKIPPED. INFO: Property 'java.util.Date.day' has no write method. SKIPPED.  WARNING: Property 'java.lang.String.hours' does not exist. SKIPPED. WARNING: Property 'java.lang.String.minutes' does not exist. SKIPPED.  WARNING: Property 'java.lang.String.month' does not exist. SKIPPED. WARNING: Property 'java.lang.String.seconds' does not exist. SKIPPED.  INFO: Property 'java.util.Date.timezoneOffset' has no write method. SKIPPED.

在此之后，当我打印POJO赋值时，我将获得 startDate作为Thu Jan 12 10:09:27 IST 2012 和 endDate as Thu Jan 12 10:09:27 IST 2012

那么将jsonObject分配给我的Pojo Date对象是什么问题

Answer 1

您的DateMorpher格式字符串不正确，请尝试以下操作：

yyyy-MM-dd'T'HH:mm:ss

了解更多信息，请参阅java文档：http://docs.oracle.com/javase/1.4.2/docs/api/java/text/SimpleDateFormat.html

Answer 2

作为一种变通方法，您可以使用StringTokenizer和T作为分隔符，以获取Date部分，然后创建Date对象。

Answer 3

Gson gson = new Gson（）; YourEntityClass e_class = gson.fromJson（JsonData，YourEntityClass.class）; 可以帮到你。

Answer 4

仅供参考，在DateMorpher类中，您在参数中传递的日期被置为小写（我不明白为什么），所以真正的模式应该是“yyyy-MM-dd't'HH：mm：ss” 。希望这会有所帮助。

如何将Json Passed Date Value分配给Java Date Object

4 个答案: