如何在杰克逊序列化中自定义日期，@JsonSerialize不起作用 [英] how to customize Date in jackson serialization , @JsonSerialize not working

问题描述

我想更改java rest webservice传递的json中的日期格式，这是因为json具有这样的日期: 2019-05-23T06:00:00Z [UTC] ，因此由于'['和']'

，客户端将 [UTC] 与数组混淆了 我使用玻璃鱼5，jax-rs，杰克逊2.9.4 databind， .我曾尝试在模型对象中使用 @JsonSerialize(using = CustomXSerializer.class)，但没有起作用，也 @JsonFormat(shape = JsonFormat.Shape.STRING，pattern ="MM-dd -yyyy，timezone =" CET)，但在模型对象的Date属性中仍然无效，它始终显示[UTC]

我的代码:

package api;
import model.people;
import java.util.Date;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/helloworld")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class HelloWorldRest {

  @GET
@Produces(MediaType.APPLICATION_JSON)
   public people sayHello() {

    people p=new people("pepe", "27",new Date());
    return p;

  }
}

模型对象:

public class people {
    private String nombre;
    private String edad;
       @JsonFormat(shape= JsonFormat.Shape.STRING, pattern="MM-dd-yyyy",timezone="CET")
    public Date d;
    public people(String pNombre,String pEdad,Date pD)
    { nombre=pNombre;
        edad=pEdad;
        d=pD;
    }
.
.
//getters and setters

pom:

        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>


        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.8</version>
        </dependency>
    </dependencies>

如果所有模型对象的日期"序列化在一个位置，是否有任何方法可以更改格式?我宁愿代替为每个模型对象创建自定义序列化程序，

解决方案

我发现了我的问题所在，我需要将jackson注册为jersey中的json提供程序，因此可以像这样在web.xml中注册

<init-param>
            <param-name>jersey.config.server.provider.classnames</param-name>
            <param-value>org.glassfish.jersey.jackson.JacksonFeature</param-value>
</init-param>

并使用pom上的依赖项，如下所示:

         <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.x</version>
        </dependency>

i want to change the date format in a json that is delivered by a java rest webservice, that is because the json have the dates like this: 2019-05-23T06:00:00Z[UTC] , so the client confuse the [UTC] with an array, because of the '[' and ']'

im using glassfish 5 ,jax-rs , jackson 2.9.4 databind, . i have tried to use @JsonSerialize(using = CustomXSerializer.class) in the model object and didn work, also @JsonFormat(shape= JsonFormat.Shape.STRING, pattern="MM-dd-yyyy",timezone="CET") in the Date property in the model object but again didnt work, its always showing [UTC]

my code:

package api;
import model.people;
import java.util.Date;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/helloworld")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class HelloWorldRest {

  @GET
@Produces(MediaType.APPLICATION_JSON)
   public people sayHello() {

    people p=new people("pepe", "27",new Date());
    return p;

  }
}

the model object:

public class people {
    private String nombre;
    private String edad;
       @JsonFormat(shape= JsonFormat.Shape.STRING, pattern="MM-dd-yyyy",timezone="CET")
    public Date d;
    public people(String pNombre,String pEdad,Date pD)
    { nombre=pNombre;
        edad=pEdad;
        d=pD;
    }
.
.
//getters and setters

pom:

        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>


        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.8</version>
        </dependency>
    </dependencies>

is there any way to change the format if the Date seralization in one spot for all the model objects? i would prefer that instead of creating custom serializer for each model object , thanks in advance

解决方案

i found what my problem was, i needed to register jackson as the json provider in jersey , so it can be registered in the web.xml like this

<init-param>
            <param-name>jersey.config.server.provider.classnames</param-name>
            <param-value>org.glassfish.jersey.jackson.JacksonFeature</param-value>
</init-param>

and using the dependency at the pom like this:

         <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.x</version>
        </dependency>

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