找不到媒體類型= application / xml的Jersey 2.x帖子調用MessageBodyWriter

Question

我在Tomcat版本8.5上使用Jersey版本2.29 / java 1.8，並嘗試從球衣其余的post service服務中調用hasmap<String,String> 。

當我嘗試寫入hasmap作為響應時，服務器上出現異常。

2019年8月23日10:20:47 PM org.glassfish.jersey.message.internal.WriterInterceptorExecutor $ TerminalWriterInterceptor aroundWriteTo SEVERE：找不到針對媒體type = application / xml，type = class java.util.LinkedHashMap，genericType = java的MessageBodyWriter。 util.Map。

以下是pom.xml，服務器和jersey客戶端代碼的詳細信息。

pom.xml

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.inject</groupId>
    <artifactId>jersey-hk2</artifactId>
</dependency>
 <dependency> 
    <groupId>javax.xml.bind</groupId>
    <artifactId>jaxb-api</artifactId> 
    <version>2.3.1</version>
</dependency>
<dependency>
    <groupId>com.sun.xml.bind</groupId> 
    <artifactId>jaxb-impl</artifactId> 
    <version>2.3.1</version> 
</dependency> 
<dependency> 
    <groupId>org.glassfish.jaxb</groupId>
    <artifactId>jaxb-runtime</artifactId> 
    <version>2.3.1</version> </dependency> 
<dependency>
    <groupId>javax.activation</groupId>
    <artifactId>activation</artifactId>
    <version>1.1.1</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>${jersey.version}</version>
</dependency>
<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-jaxb</artifactId>
    <version>${jersey.version}</version>
</dependency>

客戶代碼

ClientConfig configuration=new ClientConfig();
Client restClientConfig = ClientBuilder.newClient(configuration);
WebTarget webTarget=restClientConfig.target("http://localhost:8080/messenger/webapi/messages/testMap");
HashMap<String,String> mapStr=new HashMap<String,String>();     
mapStr.put("a","1");
mapStr.put("b","2");
webTarget.request()
.accept(MediaType.APPLICATION_XML)
.post(Entity.json(mapStr));

Map<String,String> responseMap = new HashMap<String,String>();
GenericType<Map<String,String>> entity = new GenericType<Map<String,String>>() {};
Response xmlResponse = Response.ok(entity).build();
System.out.println("XMLResponse Is :" + xmlResponse + ":"+ responseMap.size());

澤西郵政服務代碼

@POST
@Path("/testMap")
@Produces(value = { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
@Consumes(value = { MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
public Map<String,String>  postMapMessage(Map<String,String> mapMessage) {
    System.out.println("It is been invoked....and this time we will add the new MapMessage");
    if(mapMessage!=null)
    {
        System.out.println("Size of the Map Message:" + mapMessage.size());
        mapMessage.put("c","3");
    }
    return mapMessage;
}

我嘗試了幾種在Internet上找到的解決方案，但是似乎沒有任何解決方案。

有人可以告訴我我在上面的代碼片段中正在做什么嗎？

Answer 1

我可以通過創建以下包裝器類來部分解決此問題。

import java.util.Map;
import javax.xml.bind.annotation.XmlRootElement;

    @XmlRootElement
    public class JaxrsMapWrapper<T,K> {

        private Map<T,K> map;

        public JaxrsMapWrapper(){

        }

        @Override
        public String toString() {
            return  map .toString();
        }

        public void setMap(Map<T,K> map) {
            this.map = map;
        }

        public Map<T,K> getMap() {
            return map;
        }
    }

通過在getservice下面使用上面的類，返回typeof Map可以正常工作。

@GET
@Path("/mapWarpperReceive")
@Produces({MediaType.APPLICATION_XML})
public JaxrsMapWrapper<String,String> getWarpperMapMsgStr()
{

System.out.println("Returning the MapMessage as String ");
Map<String,String> originalMap=new  HashMap<String,String>(){{put("a","a");put("b","b");}};
JaxrsMapWrapper<String,String> jaxRsMapWrapper=new JaxrsMapWrapper<>();
jaxRsMapWrapper.setMap(originalMap);
return jaxRsMapWrapper;

}

但是，當我嘗試使用與Map類型相同的類JaxrsMapWrapper時，通過郵遞員調用時會引發錯誤500內部服務器錯誤。

@GET
@Path("/customMap")
@Produces({MediaType.APPLICATION_XML})
public JaxrsMapWrapper<String,BookBo> getWarpperMapMsgWithCustomObject()
{
System.out.println("Returning the MapMessage as String and Custom Message ");
Map<String,BookBo> originalMap=new  HashMap<>();
originalMap.put("a",new BookBo(1,"Jinesh"));
JaxrsMapWrapper<String,BookBo> jaxRsMapWrapper=new JaxrsMapWrapper();
jaxRsMapWrapper.setMap(originalMap);
return jaxRsMapWrapper;
}

以下是用戶定義的Java對象BookBo的代碼。

@XmlRootElement
public class BookBo implements Serializable{

    private Integer id;
    private String name;

    public BookBo() {

    }

    public BookBo(Integer id, String name) {
        super();
        this.id = id;
        this.name = name;
    }
    //getters and setters of the field
} 

我在上面的代碼中缺少什么，因為在編寫Map作為響應時無法正常工作？