[英]How to post generic type in jersey?
--------------通用類型------------------
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();
}
}
- - - - - - -問題 - - - - - - -
GET的響應: http:// localhost:8080 / api / test / query是:
{"key":{"type":"int","value":0},"value":{"type":"string","value":"value:0"}}
但是,當我將相同的json發布到POST: http:// localhost:8080 / api / test / post並帶有“Content-Type:application / json”標頭時,會發生異常:
誰能告訴我如何發布泛型類型的對象?
---------------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>
這不應該是對GET請求的正確響應
{"key":{"type":"int","value":0},"value":{"type":"string","value":"value:0"}}
它應該是
{"key":0,"value":"value:0"}
這只是使用MOXy的許多危險之一, MOXy是Jersey的默認JSON提供程序(在Glassfish中)。 如果你使用傑克遜 ,你應該看到正確的行為。
要使用Jackson,您可以通過將屬性ServerProperties.MOXY_JSON_FEATURE_DISABLE
設置為true
來禁用MOXy(防止Jackson注冊)。 或者您可以添加The Jackson依賴項,然后在應用程序中注冊JacksonFeature
。
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
<version>${jersey2.version}</version>
</dependency>
進行更改后,它應該適用於GET和POST請求。
測試來源。 運行測試時,您還應該在日志中看到請求的正確輸出,它只返回與發布的相同的對。
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.Response;
import javax.xml.bind.annotation.XmlRootElement;
import org.glassfish.jersey.filter.LoggingFilter;
import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
/**
* Required dependencies for test
*
* <dependency>
* <groupId>org.glassfish.jersey.containers</groupId>
* <artifactId>jersey-container-grizzly2-http</artifactId>
* <version>2.23</version>
* </dependency>
* <dependency>
* <groupId>org.glassfish.jersey.media</groupId>
* <artifactId>jersey-media-json-jackson</artifactId>
* <version>2.23</version>
* </dependency>
*
* @author Paul Samsotha
*/
public class JacksonGenericTest extends JerseyTest {
@XmlRootElement
public static class Pair<K, V> {
private K key;
private V value;
public Pair() {
}
public Pair(K key, V value) {
this.key = key;
this.value = value;
}
public K getKey() {
return key;
}
public void setKey(K key) {
this.key = key;
}
public V getValue() {
return value;
}
public void setValue(V value) {
this.value = value;
}
@Override
public String toString() {
return "Pair{" + "key=" + key + ", value=" + value + '}';
}
}
@Path("test")
@Consumes("application/json")
@Produces("application/json")
public static class TestResource {
@POST
public Pair create(Pair<Integer, String> pair) {
return pair;
}
}
@Override
public ResourceConfig configure() {
return new ResourceConfig(TestResource.class)
// not required here since we don't have MOXy on the classpath,
// but in Glassfish, you should make sure to register it
// so it disables MOXy, since Glassfish has MOXy on the classpath.
.register(JacksonFeature.class)
.register(new LoggingFilter(Logger.getAnonymousLogger(), true));
}
private final String jsonData = "{\"key\":100,\"value\":\"value:100\"}";
@Test
public void postTest() {
final Response response = target("test")
.request()
.post(Entity.json(jsonData));
final Pair<Integer, String> pair = response.readEntity(
new GenericType<Pair<Integer, String>>(){});
assertThat(pair.getKey(), is(100));
assertThat(pair.getValue(), is("value:100"));
}
}
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