【发布时间】：2019-11-02 07:16:42
【问题描述】：
在我的 java 应用程序中，我使用了以 JSON 格式返回数据的 REST API，并注意到这个特定的 API 以一种特殊的方式格式化了它的日期： “2019 年 11 月 1 日”，但问题是服务器上的实际日期是“2019-11-02”。这意味着我将日期最小化为上一个日期。我的服务器在另一个国家。下面是完整的 json我是格式化后得到的。
jsonAccts [{"id":8,"userId":2,"departmentId":45,"effectiveFrom":"Jun 9, 2019","endsOn":"Nov 1, 2019","createdBy":2,"createdOn":"2019-11-02 05:34:11"}]
在所有日期字段上都有这个问题。我有什么解决方案。我需要在 REST API 请求的数据库上获取相同的日期。 下面是我用于 gson 格式化的代码。
Gson gson;
GsonBuilder builder;
SimpleDateFormat dtf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ENGLISH);
SimpleDateFormat dtfDate=new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
String jsonAccts = null;
try{
builder = new GsonBuilder();
builder.registerTypeAdapter(Timestamp.class, new JsonSerializer<Timestamp>() {
@Override
public JsonElement serialize(Timestamp src, Type typeOfSrc, JsonSerializationContext context) {
dtf.setTimeZone(TimeZone.getTimeZone("UTC"));
String jsDate = dtf.format(src);
return new JsonPrimitive(jsDate);
}
});
gson = builder.create();
List<ClassTeacher> allActPgmMap = new ArrayList<ClassTeacher>();
allActPgmMap = springDao.getClassTeacherList(Integer.parseInt(deptId));
Type listType = new TypeToken<List<ClassTeacher>>() {}.getType();
jsonAccts = gson.toJson(allActPgmMap, listType);
}catch(Exception e){
e.printStackTrace();
}
return jsonAccts;
下面是 ClassTeacher 类。
import javax.persistence.*;
import java.io.Serializable;
import java.sql.Timestamp;
import java.util.Date;
@Entity
@Table(name = "class_teacher")
public class ClassTeacher implements Serializable,Comparable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private long id;
@Column(name = "user_id")
private long userId;
@Column(name = "department_id")
private long departmentId;
@Column(name = "effective_from")
@Temporal(TemporalType.DATE)
private Date effectiveFrom;
@Column(name = "ends_on")
@Temporal(TemporalType.DATE)
private Date endsOn;
@Column(name="created_by")
private long createdBy;
@Column(name="created_on")
private Timestamp createdOn;
public ClassTeacher() {
}
public ClassTeacher(long id, long departmentId, long userId, Date effectiveFrom, Date endsOn, long createdBy, Timestamp createdOn) {
this.id = id;
this.departmentId = departmentId;
this.userId = userId;
this.effectiveFrom = effectiveFrom;
this.endsOn = endsOn;
this.createdBy = createdBy;
this.createdOn = createdOn;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public long getUserId() {
return userId;
}
public void setUserId(long userId) {
this.userId = userId;
}
public long getDepartmentId() {
return departmentId;
}
public void setDepartmentId(long departmentId) {
this.departmentId = departmentId;
}
public Date getEffectiveFrom() {
return effectiveFrom;
}
public void setEffectiveFrom(Date effectiveFrom) {
this.effectiveFrom = effectiveFrom;
}
public Date getEndsOn() {
return endsOn;
}
public void setEndsOn(Date endsOn) {
this.endsOn = endsOn;
}
public long getCreatedBy() {
return createdBy;
}
public void setCreatedBy(long createdBy) {
this.createdBy = createdBy;
}
public Timestamp getCreatedOn() {
return createdOn;
}
public void setCreatedOn(Timestamp createdOn) {
this.createdOn = createdOn;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ClassTeacher that = (ClassTeacher) o;
if (id != that.id) return false;
if (createdBy != that.createdBy) return false;
if (userId != null ? !userId.equals(that.userId) : that.userId != null) return false;
if (departmentId != null ? !departmentId.equals(that.departmentId) : that.departmentId != null) return false;
if (effectiveFrom != null ? !effectiveFrom.equals(that.effectiveFrom) : that.effectiveFrom != null)
return false;
if (endsOn != null ? !endsOn.equals(that.endsOn) : that.endsOn != null) return false;
if (createdOn != null ? !createdOn.equals(that.createdOn) : that.createdOn != null) return false;
}
@Override
public int hashCode() {
int result = (int) (id ^ (id >>> 32));
result = 31 * result + (userId != null ? userId.hashCode() : 0);
result = 31 * result + (departmentId != null ? departmentId.hashCode() : 0);
result = 31 * result + (effectiveFrom != null ? effectiveFrom.hashCode() : 0);
result = 31 * result + (endsOn != null ? endsOn.hashCode() : 0);
result = 31 * result + (int) (createdBy ^ (createdBy >>> 32));
result = 31 * result + (createdOn != null ? createdOn.hashCode() : 0);
return result;
}
@Override
public int compareTo(Object comparestu) {
return this.getEffectiveFrom().compareTo(((ClassTeacher)comparestu).getEffectiveFrom());
}
}
【问题讨论】：
-
您注册了使用 UTC 时区的时间戳类型适配器。您是否尝试将此时区设置为与数据库时区匹配？