晚上好,
我是Web服务的新手,我只想编写一个简单的客户端,只需从REST调用中获取响应.
我下载并将jersey-bundle-1.17.1.jar添加到我的构建路径中,我找到了一段代码,它对一个url进行REST调用,并以String形式返回一个响应.
我是Web服务的新手,我只想编写一个简单的客户端,只需从REST调用中获取响应.
我下载并将jersey-bundle-1.17.1.jar添加到我的构建路径中,我找到了一段代码,它对一个url进行REST调用,并以String形式返回一个响应.
import javax.ws.rs.core.MediaType;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
public class TestJerseyClient {
public static void main(String[] args) {
try {
Client client = Client.create();
WebResource webResource = client
.resource("http://path/to/service");
ClientResponse response = webResource
.accept(MediaType.APPLICATION_JSON)
.get(ClientResponse.class);
if (response.getStatus() != 200)
throw new RuntimeException("Failed : HTTP error code : " + response.getStatus());
String output = response.getEntity(String.class);
System.out.println("Output from Server .... \n");
System.out.println(output);
} catch (Exception e) {
e.printStackTrace();
}
}
}
但我不想做字符串操作来获取我感兴趣的响应部分.
我更喜欢更结构化的方法,比如获取Object而不是字符串
(JSON对象,地图< K,V>对象等…)
尝试#1 – Map<K,V>
Sep 15,2013 2:46:13 AM com.sun.jersey.api.client.ClientResponse getEntity
SEVERE: A message body reader for Java class java.util.Map,and Java type java.util.Map<java.lang.String,java.lang.Object>,and MIME media type application/json; charset=UTF-8 was not found
Sep 15,2013 2:46:13 AM com.sun.jersey.api.client.ClientResponse getEntity
SEVERE: The registered message body readers compatible with the MIME media type are:
application/json; charset=UTF-8 ->
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$App
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$App
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$App
*/* ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
com.sun.jersey.core.impl.provider.entity.EntityHolderReader
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General
com.sun.jersey.api.client.ClientHandlerException: A message body reader for Java class java.util.Map,and MIME media type application/json; charset=UTF-8 was not found
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:561)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:535)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:696)
at com.sun.jersey.api.client.WebResource.access$300(WebResource.java:74)
at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:512)
at rest.TestJerseyClientAdvanced.main(TestJerseyClientAdvanced.java:36)
解决方法
我建议您使用Jackson进行(联合国)编组JSON响应.这可以通过以下两个步骤完成.
步骤1.创建一个java bean,其成员/对象名称与预期的响应匹配.例如,MyResponse.class
第2步.从客户端响应中读取实体时使用java bean.
private static ClientConfig clientConfig = new DefaultClientConfig();
clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING,Boolean.TRUE);
ClientResponse response = Client.create(clientConfig).
resource(uri).accept(MediaType.APPLICATION_JSON).
header("content-type",MediaType.APPLICATION_JSON).
get(MY_RESPONSE.class);
MyResponse output = response.getEntity(MyResponse.class);
