将 JSON REST Web 服务中的日期序列化为 ISO-8601 字符串
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Serialize Date in a JSON REST web service as ISO-8601 string
提问by Zlika
I have a JAX-RS application using JBoss AS 7.1, and I POST/GET JSON and XML objects which include Dates (java.util.Date):
我有一个使用 JBoss AS 7.1 的 JAX-RS 应用程序，我 POST/GET JSON 和 XML 对象，其中包括日期（java.util.Date）：
@XmlRootElement
@XmlAccessorType(XmlAccessField.FIELD)
public class MyObject implements Serializable
{
@XmlSchemaType(name = "dateTime")
private Date date;
...
}
When I use @Produce("application/xml") on the get method, the objets are serialized as XML and the dates are converted into ISO-8601 strings (e.g. "2012-12-10T14:50:12.123+02:00").
当我在 get 方法上使用 @Produce("application/xml") 时，对象被序列化为 XML，日期被转换为 ISO-8601 字符串（例如“2012-12-10T14:50:12.123+02:00” ）。
However, if I use @Produce("application/json") on the get method, the dates in the JSON objects are timestamps (e.g. "1355147452530") instead of ISO-8601 strings.
但是，如果我在 get 方法上使用 @Produce("application/json")，则 JSON 对象中的日期是时间戳（例如“1355147452530”）而不是 ISO-8601 字符串。
How can I do to configure the JAX-RS implementation (RESTEasy) to serialize dates in JSON format as ISO-8601 strings instead of timestamps ?
如何配置 JAX-RS 实现 (RESTEasy) 以将 JSON 格式的日期序列化为 ISO-8601 字符串而不是时间戳？
Thank you for your answers.
谢谢您的回答。
Note: I also tried to use a custom JAX-RS provider to do the JSON serialization for Dates
注意：我还尝试使用自定义 JAX-RS 提供程序对日期进行 JSON 序列化
@Provider
@Produces(MediaType.APPLICATION_JSON)
public class CustomJsonDateProvider implements MessageBodyWriter<Date>
{
...
}
This provider seems to be registered by RESTeasy on JBoss startup:
这个提供者似乎是在 JBoss 启动时由 RESTeasy 注册的：
[org.jboss.jaxrs] Adding JAX-RS provider classes: package.CustomJsonDateProvider
...
[org.jboss.resteasy.cdi.CdiInjectorFactory] No CDI beans found for class package.CustomJsonDateProvider. Using default ConstructorInjector.
but it is never used !
但它从未使用过！
回答by Dan
I assume your json parser is Hymanson, try:
我假设您的 json 解析器是 Hymanson，请尝试：
@JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd,HH:00", timezone="CET")
public Date date;
(since Hymanson 2.0)
（从Hyman逊 2.0 开始）
回答by Zlika
The default JBoss parser is Jettison, but I wasn't able to change the date format. So I switched to Hymanson and added the following class to my project to configure it:
默认的 JBoss 解析器是 Jettison，但我无法更改日期格式。所以我切换到 Hymanson 并在我的项目中添加了以下类来配置它：
@Provider
@Produces(MediaType.APPLICATION_JSON)
public class HymansonConfig implements ContextResolver<ObjectMapper>
{
private final ObjectMapper objectMapper;
public HymansonConfig()
{
objectMapper = new ObjectMapper();
objectMapper.configure(SerializationConfig.Feature.WRITE_DATES_AS_TIMESPAMPS, false);
}
@Override
public ObjectMapper getContext(Class<?> objectType)
{
return objectMapper;
}
}
回答by Shivendra Prakash Shukla
Sorry people for yelling out loud - I found the answers here
对不起，人们大声喊叫 - 我在这里找到了答案
http://wiki.fasterxml.com/HymansonFAQDateHandling,
http://wiki.fasterxml.com/HymansonFAQDateHandling，
here
这里
http://wiki.fasterxml.com/HymansonFAQ#Serializing_Dates,
http://wiki.fasterxml.com/HymansonFAQ#Serializing_Dates，
here
这里
http://wiki.fasterxml.com/HymansonHowToCustomSerializers
http://wiki.fasterxml.com/HymansonHowToCustomSerializers
here
这里
http://Hymanson.codehaus.org/1.1.2/javadoc/org/codehaus/Hymanson/map/util/StdDateFormat.html
http://Hymanson.codehaus.org/1.1.2/javadoc/org/codehaus/Hymanson/map/util/StdDateFormat.html
Using the @JsonSerialize(using= ... ) way:
使用 @JsonSerialize(using= ... ) 方式：
public class JsonStdDateSerializer
extends JsonSerializer<Date> {
private static final DateFormat iso8601Format =
StdDateFormat.getBlueprintISO8601Format();
@Override
public void serialize(
Date date, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonProcessingException {
// clone because DateFormat is not thread-safe
DateFormat myformat = (DateFormat) iso8601Format.clone();
String formattedDate = myformat.format(date);
jgen.writeString(formattedDate);
}
}
回答by Bertrand RODRIGUES
Declare the same Serializerused by Soap/XML:
声明SerializerSoap/XML 使用的相同内容：
@XmlElement(name = "prealert_date")
@XmlSchemaType(name = "dateTime")
@JsonSerialize(using = XMLGregorianCalendarSerializer.class)
protected XMLGregorianCalendar prealertDate;
