Using the Jersey client to do a POST operation

Question

In a Java method  I d like to use a Jersey client object to do a POST operation on a RESTful web service  also written using Jersey  but am not sure how to use the client to send the values that will be used as FormParam s on the server   I m able to send query params just fine

User · Answer

Simplest   Form form   new Form    form add  id    1        form add  name    supercobra    ClientResponse response   webResource    type MediaType APPLICATION FORM URLENCODED TYPE     post ClientResponse class  form

User · Answer

It is now the first example in the Jersey Client documentation  Example 5 1  POST request with form parameters  Client client   ClientBuilder newClient    WebTarget target   client target  http   localhost 9998   path  resource     Form form   new Form    form param  x    foo    form param  y    bar     MyJAXBBean bean   target request MediaType APPLICATION JSON TYPE       post Entity entity form MediaType APPLICATION FORM URLENCODED TYPE           MyJAXBBean class

User · Answer

Also you can try this   MultivaluedMap formData   new MultivaluedMapImpl    formData add  name1    val1    formData add  name2    val2    webResource path  yourJerseysPathPost   queryParams formData  post

User · Answer

If you need to do a file upload  you ll need to use MediaType MULTIPART FORM DATA TYPE  Looks like MultivaluedMap cannot be used with that so here s a solution with FormDataMultiPart   InputStream stream   getClass   getClassLoader   getResourceAsStream fileNameToUpload    FormDataMultiPart part   new FormDataMultiPart    part field  String key    String value    part field  fileToUpload   stream  MediaType TEXT PLAIN TYPE   String response   WebResource type MediaType MULTIPART FORM DATA TYPE  post String class  part

User · Answer

Starting from Jersey 2 x  the MultivaluedMapImpl class is replaced by MultivaluedHashMap  You can use it to add form data and send it to the server       WebTarget webTarget   client target  http   www example com some resource        MultivaluedMap lt String  String gt  formData   new MultivaluedHashMap lt String  String gt         formData add  key1    value1        formData add  key2    value2        Response response   webTarget request   post Entity form formData      Note that the form entity is sent in the format of  application x-www-form-urlencoded

User · Answer

Not done this yet myself  but a quick bit of Google-Fu reveals a tech tip on blogs oracle com with examples of exactly what you ask for   Example taken from the blog post   MultivaluedMap formData   new MultivaluedMapImpl    formData add  name1    val1    formData add  name2    val2    ClientResponse response   webResource      type MediaType APPLICATION FORM URLENCODED TYPE       post ClientResponse class  formData     That any help

[java] Using the Jersey client to do a POST operation

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