httpclient访问restful

转：http://howtodoinjava.com/2013/05/21/jax-rs-restful-client-using-apache-httpclient/

 

JAX-RS RESTful client using apache httpclient

 

public static void demoPostRESTAPI() throws Exception

{

    DefaultHttpClient httpClient = new DefaultHttpClient();

     

    User user = new User();

    user.setId(100);

    user.setFirstName("Lokesh");

    user.setLastName("Gupta");

     

    StringWriter writer = new StringWriter();

    JAXBContext jaxbContext = JAXBContext.newInstance(User.class);

    Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

    jaxbMarshaller.marshal(user, writer);

     

    try

    {

        //Define a postRequest request

        HttpPost postRequest = new HttpPost("http://localhost:8080/RESTfulDemoApplication/user-management/users");

         

        //Set the API media type in http content-type header

        postRequest.addHeader("content-type", "application/xml");

         

        //Set the request post body

        StringEntity userEntity = new StringEntity(writer.getBuffer().toString());

        postRequest.setEntity(userEntity);

          

        //Send the request; It will immediately return the response in HttpResponse object if any

        HttpResponse response = httpClient.execute(postRequest);

         

        //verify the valid error code first

        int statusCode = response.getStatusLine().getStatusCode();

        if (statusCode != 201)

        {

            throw new RuntimeException("Failed with HTTP error code : " + statusCode);

        }

    }

    finally

    {

        //Important: Close the connect

        httpClient.getConnectionManager().shutdown();

    }

}

 

就是关键的postRequest.addHeader("content-type", "application/xml");