What is the best Java library to use for HTTP POST GET etc

Question

What is the best Java library to use for HTTP POST, GET etc. in terms of performance, stability, maturity etc.? Is there one particular library that is used more than others?

My requirements are submitting HTTPS POST requests to a remote server. I have used the java.net.* package in the past as well as org.apache.commons.httpclient.* package. Both have got the job done, but I would like some of your opinions/recommendations.

User · Answer

I agree httpclient is something of a standard - but I guess you are looking for options so...

Restlet provides a http client specially designed for interactong with Restful web services.

Example code:

    Client client = new Client(Protocol.HTTP);
    Request r = new Request();
    r.setResourceRef("http://127.0.0.1:8182/sample");
    r.setMethod(Method.GET);
    r.getClientInfo().getAcceptedMediaTypes().add(new Preference<MediaType>(MediaType.TEXT_XML));
    client.handle(r).getEntity().write(System.out);

See http://www.restlet.org/ for more details

User · Answer

May I recommend you corn-httpclient  It s simple fast and enough for most cases   HttpForm form   new HttpForm new URI  http   localhost 8080 test formtest jsp       Authentication form setCredentials  user1    password    form putFieldValue  input1    your value    HttpResponse response   form doPost    assertFalse response hasError     assertNotNull response getData     assertTrue response getData   contains  received     val      maven dependency    lt dependency gt       lt groupId gt net sf corn lt  groupId gt       lt artifactId gt corn-httpclient lt  artifactId gt       lt version gt 1 0 0 lt  version gt   lt  dependency gt

User · Answer

imho  Apache HTTP Client  usage example   import org apache commons httpclient    import org apache commons httpclient methods    import org apache commons httpclient params HttpMethodParams   import java io     public class HttpClientTutorial      private static String url    http   www apache org       public static void main String   args           Create an instance of HttpClient      HttpClient client   new HttpClient            Create a method instance      GetMethod method   new GetMethod url           Provide custom retry handler is necessary     method getParams   setParameter HttpMethodParams RETRY HANDLER               new DefaultHttpMethodRetryHandler 3  false         try            Execute the method        int statusCode   client executeMethod method          if  statusCode    HttpStatus SC OK            System err println  Method failed      method getStatusLine                       Read the response body        byte   responseBody   method getResponseBody              Deal with the response           Use caution  ensure correct character encoding and is not binary data       System out println new String responseBody           catch  HttpException e          System err println  Fatal protocol violation      e getMessage           e printStackTrace          catch  IOException e          System err println  Fatal transport error      e getMessage           e printStackTrace          finally            Release the connection        method releaseConnection                    some highlight features    Standards based  pure Java  implementation of HTTP versions 1 0 and 1 1   Full implementation of all HTTP methods  GET  POST  PUT  DELETE  HEAD  OPTIONS  and TRACE  in an extensible OO framework  Supports encryption with HTTPS  HTTP over SSL  protocol  Granular non-standards configuration and tracking  Transparent connections through HTTP proxies  Tunneled HTTPS connections through HTTP proxies  via the CONNECT method  Transparent connections through SOCKS proxies  version 4  amp  5  using native Java socket support  Authentication using Basic  Digest and the encrypting NTLM  NT Lan Manager  methods  Plug-in mechanism for custom authentication methods  Multi-Part form POST for uploading large files  Pluggable secure sockets implementations  making it easier to use third party solutions Connection management support for use in multi-threaded applications  Supports setting the maximum total connections as well as the maximum connections per host  Detects and closes stale connections  Automatic Cookie handling for reading Set-Cookie  headers from the server and sending them back out in a Cookie  header when appropriate  Plug-in mechanism for custom cookie policies  Request output streams to avoid buffering any content body by streaming directly to the socket to the server  Response input streams to efficiently read the response body by streaming directly from the socket to the server  Persistent connections using KeepAlive in HTTP 1 0 and persistance in HTTP 1 1 Direct access to the response code and headers sent by the server  The ability to set connection timeouts  HttpMethods implement the Command Pattern to allow for parallel requests and efficient re-use of connections  Source code is freely available under the Apache Software License

User · Answer

I would recommend Apache HttpComponents HttpClient, a successor of Commons HttpClient

I would also recommend to take a look at HtmlUnit. HtmlUnit is a "GUI-Less browser for Java programs". http://htmlunit.sourceforge.net/

User · Answer

I m somewhat partial to Jersey  We use 1 10 in all our projects and haven t run into an issue we couldn t solve with it    Some reasons why I like it    Providers - created soap 1 1 1 2 providers in Jersey and have eliminated the need to use the bulky AXIS for our JAX-WS calls Filters - created database logging filters to log the entire request  including the request response headers  while preventing logging of sensitive information  JAXB - supports marshaling to from objects straight from the request response API is easy to use   In truth  HTTPClient and Jersey are very similar in implementation and API  There is also an extension for Jersey that allows it to support HTTPClient   Some code samples with Jersey 1 x  https   blogs oracle com enterprisetechtips entry consuming restful web services with  http   www mkyong com webservices jax-rs restful-java-client-with-jersey-client   HTTPClient with  Jersey Client  https   blogs oracle com PavelBucek entry jersey client apache http client

User · Answer

Google HTTP Java Client looks good to me because it can run on Android and App Engine as well

User · Answer

I want to mention the Ning Async Http Client Library  I ve never used it but my colleague raves about it as compared to the Apache Http Client  which I ve always used in the past  I was particularly interested to learn it is based on Netty  the high-performance asynchronous i o framework  with which I am more familiar and hold in high esteem

[java] What is the best Java library to use for HTTP POST, GET etc.?

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