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(
""
);
//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"
);