Appache HTTP 组件库似乎可以很好地与常规网站通信，但无法连接到 Web 服务。
我正在构建要在 Java 桌面应用程序中运行的组件，该应用程序将使用 Jersey 框架与 Web Service-REST 进行通信。Web 服务正在运行，我可以与我的 Web 浏览器和 netbeans 中的 Test-Web-Service 功能进行通信。
如果我尝试从常规网页甚至是我机器上运行的 Glassfish Web 服务器的默认页面读取，客户端代码工作正常。为什么当我尝试使用我的客户端程序（下面的代码）访问 Web 服务时，我会从 Web 服务器收到 404 Not Found 错误？
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);
}
}
}
当访问在线的常规网站或本地托管的非 Web 服务站点时，输出为
HTTP/1.1 200 OK
其次是网页的内容。
上面的代码给了我
HTTP/1.1 404 Not Found
编辑：下面是 Web 服务的代码。Web 服务代码是从 Netbeans 示例项目生成的。
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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;
}
}