Java 8 LocalDate Jackson格式 [英] Java 8 LocalDate Jackson format

问题描述

对于 java.util.Date 当我这样做时

  @JsonFormat（shape = JsonFormat。 Shape.STRING，pattern =dd / MM / yyyy）
 private Date dateOfBirth;我发送
  {{dateOfBirth：01/01/2000}} 
  
它有效。
 
 
 
我应该如何为 Java 8的LocalDate 字段做这个？
 
 
 
我试过
  @JsonDeserialize（using = LocalDateDeserializer.class）
 @JsonSerialize（using = LocalDateSerializer.class）
 private LocalDate dateOfBirth; 
  
它不起作用。
 
 
 
有人可以让我知道这样做的正确方法.. 
 
 
 
以下是依赖项
 <依赖性> 
< groupId> org.jboss.resteasy< / groupId> 
< artifactId> jaxrs-api< / artifactId> 
< version> 3.0.9.Final< / version> 
< / dependency> 
< dependency> 
< groupId> com.fasterxml.jackson.jaxrs< / groupId> 
< artifactId> jackson-jaxrs-json-provider< / artifactId> 
< version> 2.4.2< / version> 
< / dependency> 
< dependency> 
< groupId> com.wordnik< / groupId> 
< artifactId> swagger-annotations< / artifactId> 
< version> 1.3.10< / version> 
< / dependency> 
< dependency> 
  
 
 
解决方案
我从来没有能够简单地使用它注释。为了使它工作，我创建了一个 <$  ObjectMapper 的c $ c> ContextResolver  ，然后我添加了 JSR310Module  ，还有一个警告，需要将write-date-as-timestamp设置为false。有关详情，请参阅 JSR310模块的文档。以下是我使用的示例。
 
 
 
依赖性
 <依赖性> 
< groupId> com.fasterxml.jackson.datatype< / groupId> 
< artifactId> jackson-datatype-jsr310< / artifactId> 
< version> 2.4.0< / version> 
< / dependency> 
  
  注意：我遇到的一个问题是 jackson-annotation 由另一个依赖项引入的版本，使用版本2.3.2，它取消了 jsr310 。发生的事情是我为 ObjectIdResolver 获得了NoClassDefFound，这是一个2.4类。所以我只需要排列包含的依赖版本 
 
 
 
 ContextResolver 
  import com.fasterxml.jackson.databind.ObjectMapper; 
 import com.fasterxml.jackson.databind.SerializationFeature; 
 import com.fasterxml.jackson.datatype.jsr310.JSR310Module; 
 import javax.ws.rs.ext.ContextResolver; 
 import javax.ws.rs.ext.Provider; 
 
 @Provider 
公共类ObjectMapperContextResolver实现ContextResolver< ObjectMapper> {
私人最终的ObjectMapper MAPPER; 
 
 public ObjectMapperContextResolver（）{
 MAPPER = new ObjectMapper（）; 
 MAPPER.registerModule（new JSR310Module（））; 
 MAPPER.configure（SerializationFeature.WRITE_DATES_AS_TIMESTAMPS，false）; 
} 
 
 @Override 
 public ObjectMapper getContext（Class<？> type）{
 return MAPPER; 
} 
} 
  
资源等级
  @Path（person）
公共类LocalDateResource {
 
 @GET 
 @Produces（MediaType.APPLICATION_JSON ）
 public Response getPerson（）{
 Person person = new Person（）; 
 person.birthDate = LocalDate.now（）; 
返回Response.ok（person）.build（）; 
} 
 
 @POST 
 @Consumes（MediaType.APPLICATION_JSON）
 public Response createPerson（Person person）{
 return Response.ok（
 DateTimeFormatter.ISO_DATE.format（person.birthDate））。build（）; 
} 
 
 public static class Person {
 public LocalDate birthDate; 
} 
} 
  
测试
 
 
  curl -v http：// localhost：8080 / api / person  
 
 结果：  {birthDate：2015-03-01}  
 
 
 
  curl -v -POST -HContent-Type：application / json-d{\birthDate \：\2015-03-01 \}http：// localhost： 8080 / api / person  
 
 结果：  2015-03-01  
 
 
 
 
 
 
 
 
另见 此处 适用于JAXB解决方案。
 
 
 
更新
 
 
 
从Jackson 2.7版本开始，不推荐使用 JSR310Module 。相反，您应该注册模块 JavaTimeModule 。它仍然是相同的依赖。
 
For java.util.Date when I do  
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd/MM/yyyy")  
  private Date dateOfBirth;
then in JSON request when I send   
{ {"dateOfBirth":"01/01/2000"} }  
it works.

How should I do this for Java 8's LocalDate field??

I tried having   
@JsonDeserialize(using = LocalDateDeserializer.class)  
@JsonSerialize(using = LocalDateSerializer.class)  
private LocalDate dateOfBirth;  
It didn't work.

Can someone please let me know what's the right way to do this..  

Below are dependencies
<dependency>
         <groupId>org.jboss.resteasy</groupId>
         <artifactId>jaxrs-api</artifactId>
         <version>3.0.9.Final</version>
      </dependency>
      <dependency>
         <groupId>com.fasterxml.jackson.jaxrs</groupId>
         <artifactId>jackson-jaxrs-json-provider</artifactId>
         <version>2.4.2</version>
      </dependency>
      <dependency>
         <groupId>com.wordnik</groupId>
         <artifactId>swagger-annotations</artifactId>
         <version>1.3.10</version>
      </dependency>
      <dependency>

解决方案
I was never able to get this to work simple using annotations. To get it to work, I created a ContextResolver for ObjectMapper, then I added the JSR310Module, along with one more caveat, which was the need to set write-date-as-timestamp to false.  See more at the documentation for the JSR310 module. Here's an example of what I used.

Dependency
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
    <version>2.4.0</version>
</dependency>
Note: One problem I faced with this is that the jackson-annotation version pulled in by another dependency, used version 2.3.2, which cancelled out the 2.4 required by the jsr310. What happened was I got a NoClassDefFound for ObjectIdResolver, which is a 2.4 class. So I just needed to line up the included dependency versions

ContextResolver
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JSR310Module;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;

@Provider
public class ObjectMapperContextResolver implements ContextResolver<ObjectMapper> {  
    private final ObjectMapper MAPPER;

    public ObjectMapperContextResolver() {
        MAPPER = new ObjectMapper();
        MAPPER.registerModule(new JSR310Module());
        MAPPER.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return MAPPER;
    }  
}
Resource class
@Path("person")
public class LocalDateResource {

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response getPerson() {
        Person person = new Person();
        person.birthDate = LocalDate.now();
        return Response.ok(person).build();
    }

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    public Response createPerson(Person person) {
        return Response.ok(
                DateTimeFormatter.ISO_DATE.format(person.birthDate)).build();
    }

    public static class Person {
        public LocalDate birthDate;
    }
}
Test

  
curl -v http://localhost:8080/api/person

  Result: {"birthDate":"2015-03-01"}
  
  
curl -v -POST -H "Content-Type:application/json" -d "{\"birthDate\":\"2015-03-01\"}" http://localhost:8080/api/person

  Result: 2015-03-01




See also here for JAXB solution.

UPDATE

The JSR310Module is deprecated as of version 2.7 of Jackson. Instead, you should register the module JavaTimeModule. It is still the same dependency.

                        
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