Appache HTTPコンポーネントライブラリは、通常のWebサイトとの通信には正常に機能しているようですが、Webサービスに接続できません。
私は、Jerseyフレームワークを使用してWebサービス-RESTと通信するJavaDesktopアプリケーション内で実行するコンポーネントを構築しています。Webサービスが実行されており、WebブラウザーおよびNetBeansのTest-Web-Service関数と通信できます。
通常のWebページ、またはマシンで実行されているGlassfish Webサーバーのデフォルトページから読み込もうとすると、クライアントコードは正常に機能します。クライアントプログラム（以下のコード）を使用してWebサービスにアクセスしようとすると、Webサーバーから404 Not Foundエラーが発生するのはなぜですか？
import java.io.*;
import org.apache.http.*;
import org.apache.http.client.*;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.client.methods.*; //HttpHead, HttpPut, HttpGet, etc...
import org.apache.http.util.EntityUtils;
public class ApacheClientDemo {
public static void demo() throws IOException {
String uri = "http://localhost:8080/Proctorest/resources/helloWorld";
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(uri);
HttpResponse response = httpclient.execute(httpget);
System.out.println(response.getStatusLine().toString());
HttpEntity entity = response.getEntity();
System.out.println();
System.out.println(EntityUtils.toString(entity));
}
public static void main(String[] args) {
try {
demo();
}
catch(IOException ioe) {
System.out.println(ioe);
}
}
}
オンラインの通常のWebサイト、またはローカルでホストされている非Webサービスサイトにアクセスすると、次のように出力されます。
HTTP/1.1 200 OK
Webページのコンテンツが続きます。
上記のコードは私に与えます
HTTP/1.1 404 Not Found
編集：以下はWebサービスのコードです。Webサービスコードは、Netbeansサンプルプロジェクトから生成されました。
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package helloworld;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.Produces;
import javax.ws.rs.Consumes;
/**
* REST Web Service
*
* @author mkuchtiak
*/
@Stateless
@Path("/helloWorld")
public class HelloWorldResource {
@EJB
private NameStorageBean nameStorage;
/**
* Retrieves representation of an instance of helloworld.HelloWorldResource
* @return an instance of java.lang.String
*/
@GET
@Produces("text/html")
public String getXml() {
return "<html><body><h1>Hello "+nameStorage.getName()+"!</h1></body></html>";
}
/**
* PUT method for updating an instance of HelloWorldResource
* @param content representation for the resource
* @return an HTTP response with content of the updated or created resource.
*/
@PUT
@Consumes("text/plain")
public void putXml(String content) {
nameStorage.setName(content);
}
}
/////////// NameStorageBean .java
import javax.ejb.Singleton;
/** Singleton session bean used to store the name parameter for "/helloWorld" resource
*
* @author mkuchtiak
*/
@Singleton
public class NameStorageBean {
// name field
private String name = "World";
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}