如何在球衣上发布泛型？

Question

-------------- Generic Type ------------------

public class Pair<KT, VT> {
    private KT key;
    private VT value;

    public Pair() {
    }

    public Pair(KT key, VT value) {
        this.key = key;
        this.value = value;
    }
}

------------- Restful API ------------

@Path("/test")
public class TestApi {
    @GET
    @Path("/query")
    @Produces(MediaType.APPLICATION_JSON)
    public Pair query(@DefaultValue("0") @QueryParam("key") int key) {
        return new Pair(key, "value:" + key);
    }

    @POST
    @Path("/post")
    @Consumes(MediaType.APPLICATION_JSON)
    public String create(Pair<Integer, String> pair){
        return "put success : " + pair.toString();
    }
}

-------------问题--------------

GET的回应：http://localhost:8080/api/test/query是：

{"key":{"type":"int","value":0},"value":{"type":"string","value":"value:0"}}

但是，当我将相同的json发布到POST：http://localhost:8080/api/test/post时使用＆＃34; Content-Type：application / json＆＃34;标头，发生异常：

有谁能告诉我如何发布泛型类型的对象？

---------------的pom.xml ------------------

    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-server</artifactId>
            <version>${jersey.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-client</artifactId>
            <version>${jersey.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-common</artifactId>
            <version>${jersey.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
            <version>${jersey.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.7.5</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.jaxrs</groupId>
            <artifactId>jackson-jaxrs-json-provider</artifactId>
            <version>2.7.4</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>${jersey.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.test-framework.providers</groupId>
            <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
            <version>${jersey.version}</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlet</artifactId>
            <version>${jetty.version}</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-webapp</artifactId>
            <version>${jetty.version}</version>
        </dependency>
    </dependencies>
    <properties>
        <jersey.version>2.23.1</jersey.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <jetty.version>9.0.6.v20130930</jetty.version>
    </properties>

Answer 1

这不应该是对GET请求的正确回应

SELECT class,
       COUNT(class) as N,
       publisher
FROM books
WHERE publisher in (
      'Company ABC', 'Company DEF', 'Company GHI',
  'Company JKL', 'Company MNO'
  )
GROUP BY class, publisher
;

应该是

{"key":{"type":"int","value":0},"value":{"type":"string","value":"value:0"}}

这只是使用MOXy的许多危险之一，Jackson是Jersey的默认JSON提供程序（在Glassfish中）。如果您使用ServerProperties.MOXY_JSON_FEATURE_DISABLE，则应该看到正确的行为。

要使用Jackson，您可以通过将属性TableRow division设置为{"key":0,"value":"value:0"} 来禁用MOXy（可防止Jackson注册）。或者您可以添加The Jackson依赖项，然后在应用程序中注册true。

JacksonFeature

进行更改后，它应该适用于GET和POST请求。

更新

测试来源。运行测试时，您还应该在日志中看到请求的正确输出，该输出只返回与发布的相同的对。

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>${jersey2.version}</version>
</dependency>