How to send and receive JSON data from a restful webservice using Jersey API

Question

Path   hello   public class Hello         POST      Path   id         Produces MediaType APPLICATION JSON       Consumes MediaType APPLICATION JSON      public JSONObject sayPlainTextHello  PathParam  id  JSONObject inputJsonObj             String input    String  inputJsonObj get  input            String output  The input you sent is    input          JSONObject outputJsonObj   new JSONObject            outputJsonObj put  output   output            return outputJsonObj             This is my webservice  I am using Jersey API   But I could not figure out a way to call this method from a java rest client to send and receive the json data  I tried the following way to write the client  ClientConfig config   new DefaultClientConfig    Client client   Client create config   WebResource service   client resource getBaseURI     JSONObject inputJsonObj   new JSONObject    inputJsonObj put  input    Value    System out println service path  rest   path  hello   accept MediaType APPLICATION JSON  entity inputJsonObj  post JSONObject class JSONObject class      But this shows the following error   Exception in thread  main  com sun jersey api client ClientHandlerException  com sun jersey api client ClientHandlerException  A message body writer for Java type  class java lang Class  and MIME media type  application octet-stream  was not found

User · Answer

The above problem can be solved by adding the following dependencies in your project  as i was facing the same problem For more detail answer to this solution please refer link SEVERE MessageBodyWriter not found for media type application xml type class java util HashMap       lt dependency gt           lt groupId gt org codehaus jackson lt  groupId gt           lt artifactId gt jackson-mapper-asl lt  artifactId gt           lt version gt 1 9 0 lt  version gt       lt  dependency gt         lt  -- https   mvnrepository com artifact com fasterxml jackson core jackson-databind -- gt       lt dependency gt           lt groupId gt com fasterxml jackson core lt  groupId gt           lt artifactId gt jackson-databind lt  artifactId gt           lt version gt 2 9 2 lt  version gt       lt  dependency gt            lt dependency gt           lt groupId gt org glassfish jersey media lt  groupId gt           lt artifactId gt jersey-media-json-jackson lt  artifactId gt           lt version gt 2 25 lt  version gt       lt  dependency gt

User · Answer

For me  parameter  JSONObject inputJsonObj  was not working  I am using jersey 2   Hence I feel this is the java Jax-rs  and Angular way I hope it s helpful to someone using JAVA Rest and AngularJS like me    POST  Consumes MediaType TEXT PLAIN   Produces MediaType APPLICATION JSON  public Map lt String  String gt  methodName String data  throws Exception       JSONObject recoData   new JSONObject data         Do whatever with json object     Client side I used AngularJS  factory update   function      data    user  Shreedhar Bhat  address   houseNo 105   city  Bengaluru              data  JSON stringify data    Convert object to string         var d    q defer             http               method   POST               url   REST webApp update               headers    Content-Type    text plain                data data                     success function  response                d resolve response                       error function  response                d reject response                        return d promise

User · Answer

Your use of  PathParam is incorrect  It does not follow these requirements as documented in the javadoc here  I believe you just want to POST the JSON entity  You can fix this in your resource method to accept JSON entity    Path   hello   public class Hello       POST    Produces MediaType APPLICATION JSON     Consumes MediaType APPLICATION JSON    public JSONObject sayPlainTextHello JSONObject inputJsonObj  throws Exception        String input    String  inputJsonObj get  input        String output    The input you sent is      input      JSONObject outputJsonObj   new JSONObject        outputJsonObj put  output   output        return outputJsonObj          And  your client code should look like this     ClientConfig config   new DefaultClientConfig      Client client   Client create config     client addFilter new LoggingFilter       WebResource service   client resource getBaseURI       JSONObject inputJsonObj   new JSONObject      inputJsonObj put  input    Value      System out println service path  rest   path  hello   accept MediaType APPLICATION JSON  post JSONObject class  inputJsonObj

[java] How to send and receive JSON data from a restful webservice using Jersey API

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