Dieses Tutorial zeigt Ihnen, wie Sie einen RESTful-Java-Client mit RESTEasy-Client-Framework erstellen, um " GET " - und " POST " -Anforderungen an den zuletzt erstellten REST-Service auszuführen Tutorial „ Jackson JAX-RS “.
1. RESTEasy Client Framework
Das RESTEasy-Client-Framework ist im RESTEasy-Kernmodul enthalten. Sie müssen also nur das " resteasy-jaxrs.jar " in Ihrer `pom.xml'-Datei angeben.
Datei: pom.xml
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>2.2.1.GA</version>
</dependency>
2. GET-Anfrage
Den letzten REST-Service überprüfen.
@Path("/json/product")
public class JSONService {
@GET
@Path("/get")
@Produces("application/json")
public Product getProductInJSON() {
Product product = new Product();
product.setName("iPad 3");
product.setQty(999);
return product;
}
//...
RESTEasy-Client zum Senden einer "GET" -Anforderung.
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.http.client.ClientProtocolException;
import org.jboss.resteasy.client.ClientRequest;
import org.jboss.resteasy.client.ClientResponse;
public class RESTEasyClientGet {
public static void main(String[]args) {
try {
ClientRequest request = new ClientRequest(
"http://localhost:8080/RESTfulExample/json/product/get");
request.accept("application/json");
ClientResponse<String> response = request.get(String.class);
if (response.getStatus() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatus());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
new ByteArrayInputStream(response.getEntity().getBytes())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Ausgabe…
Output from Server ....
{"qty":999,"name":"iPad 3"}
3. POST-Anfrage
Überprüfen Sie auch den letzten REST-Service.
@Path("/json/product")
public class JSONService {
@POST
@Path("/post")
@Consumes("application/json")
public Response createProductInJSON(Product product) {
String result = "Product created : " + product;
return Response.status(201).entity(result).build();
}
//...
RESTEasy-Client zum Senden einer "POST" -Anforderung.
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import org.jboss.resteasy.client.ClientRequest;
import org.jboss.resteasy.client.ClientResponse;
public class RESTEasyClientPost {
public static void main(String[]args) {
try {
ClientRequest request = new ClientRequest(
"http://localhost:8080/RESTfulExample/json/product/post");
request.accept("application/json");
String input = "{\"qty\":100,\"name\":\"iPad 4\"}";
request.body("application/json", input);
ClientResponse<String> response = request.post(String.class);
if (response.getStatus() != 201) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatus());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
new ByteArrayInputStream(response.getEntity().getBytes())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Ausgabe…
Output from Server .... Product created : Product[name=iPad 4, qty=100].... === Quellcode herunterladen Download - link://wp-content/uploads/2011/07/RESTful-Java-Client-RESTEasyt-Example.zip[RESTful-Java-Client-RESTEasyt-Example.zip](9 KB) === Referenzen . http://jackson.codehaus.org/%20[Jackson Offizielle Website] . link://webservices/jax-rs/restfull-java-client-with-java-net-url/[RESTful Java-Client mit java.net.URL]. link://webservices/jax-rs/restful-java-client-with-apache-httpclient/[RESTful Java-Client mit Apache HttpClient] Link://Tag/Client/[Client]Link://Tag/Jax-RS/[Jax-RS]link://tag/resteasy/[resteasy]link://tag/restful/[restful]