Jersey 1.x Tutorial

http://www.developerscrappad.com/2308/java/java-ee/rest-jax-rs/java-rest-jax-rs-2-0-how-to-handle-date-time-and-timestamp-data-types/

https://jersey.java.net/documentation/1.19/client-api.html
Related: jersey-2x

Client instances are expensive resources. It is recommended a configured instance is reused for the creation of Web resources. The creation of Web resources, the building of requests and receiving of responses are guaranteed to be thread safe. Thus a Client instance and WebResource instances may be shared between multiple threads.

In the above cases a WebResource instance will utilize HttpUrlConnection or HttpsUrlConnection, if the URI scheme of the WebResource is “http” or “https” respectively.

http://stackoverflow.com/questions/14305655/jersey-client-services-closing-resources

While there is no explicit concurrency documentation for ClientConfig, it's clear from its source code that its safe to use in a multithreaded environment. The Client class is also thread safe, leaving just the WebResource to consider. Based on its documentation I would dedicate a new WebResource to each thread, meaning your code should look more like this:

ClientConfig config = new DefaultClientConfig();
Client client = Client.create(config);

public void getUser() {         
    WebResource service = client.resource(RESOURCE_URL);

    // Get response as String
    String response = service
        .path("/addUser")
        .accept(MediaType.TEXT_PLAIN)
        .get(String.class);

        return response;
}

http://techblog.chegg.com/2014/06/06/how-to-teach-jersey-to-speak-csv/

To add any additional mime-type support to the JAX-RS service a few things need to be done:

• The @Produces annotation on the endpoint needs to mention the mime-type supported;
• There must be a MessageBodyWriter implementation registered with the system that is capable of producing the mime-type. In annotation words it means that we need to have a class annotated with @Provider and@Produces that mentions our target mime-type. The implementation needs to marshal a given object to the OutputStream provided.

There are a number of libraries out there to address this: Jackson Extension CSV (jackson-dataformat-csv), Super CSV (with the Dozer plugin for some more complex conversions), Open CSV, Apache Commons CSV and others.

Below is a MessageBodyWriter implementation that supports marshalling of the Object class into CSV or ‘XLS’. XLS is actually just a CSV flavor tailored for Excel so that Excel does not remove tailing zeros for numbers and preserves the original cell text better in general.

http://www.mkyong.com/webservices/jax-rs/download-excel-file-from-jax-rs/

In JAX-RS, for excel file, annotate the method with @Produces("application/vnd.ms-excel") :

1. Put @Produces(“application/vnd.ms-excel”) on service method.
2. Set “Content-Disposition” in Response header to prompt a download box.

 @GET
 @Path("/get")
 @Produces("application/vnd.ms-excel")
 public Response getFile() {

  File file = new File(FILE_PATH);

  ResponseBuilder response = Response.ok((Object) file);
  response.header("Content-Disposition",
   "attachment; filename=new-excel-file.xls");
  return response.build();

 }

http://www.benchresources.net/jersey-2-x-web-service-for-uploadingdownloading-excel-file-java-client/

CSV

http://blog.xyleolabs.com/2015/05/making-your-jersey-client-post-csv-data.html

http://stackoverflow.com/questions/5161466/how-do-i-use-the-jersey-json-pojo-support

1. Add jackson*.jar to your classpath (As stated by @Vitali Bichov);
2. In web.xml, if you're using com.sun.jersey.config.property.packages init parameter, add org.codehaus.jackson.jaxrs to the list. This will include JSON providers in the scan list of Jersey

http://blog.alutam.com/2012/06/26/writing-web-applications-that-can-run-with-jersey-1-x-as-well-as-jersey-2-0/

// extend PackagesResourceConfig to get the package scanning functionality

public class ExampleResourceConfig extends PackagesResourceConfig {

    public ExampleResourceConfig() {

        // pass name of the package to be scanned

        super("com.example");

         

        // add InfoResource as an explicit resource bound to "info" path

        this.getExplicitRootResources().put("info", InfoResource.class);

    }

https://bharatonjava.wordpress.com/2012/09/08/jersey-hello-world-example/

      ResourceConfig rc = new PackagesResourceConfig(

                "com.bharat.examples.rest");