Apache HttpClient - REST API: Issue in converting response to customized object which is put as SerializableEntity -

i using apache httpclient put/get customized object using rest apis. below sample code. putobject() method works fine , serialize person object , put properly. however, while getting object, got below error:

exception in thread "main" java.lang.classcastexception: [b cannot cast person    @ mytest.demogetrestapi(mytest.java:88)    @ mytest.main(mytest.java:21) 

seems code build person object out of response entity not correct

  httpentity httpentity = response.getentity();             byte[] resultbytearray = entityutils.tobytearray(httpentity);             person person = (person)serializationutils.deserialize(resultbytearray); 

am doing somthing wrong while getting byte[] array , converting person object. please me out solve issue.

complete example program:

import java.io.serializable;  import org.apache.commons.lang.serializationutils; import org.apache.http.httpentity; import org.apache.http.httpresponse; import org.apache.http.client.httpclient; import org.apache.http.client.methods.httpget; import org.apache.http.client.methods.httpput; import org.apache.http.entity.serializableentity; import org.apache.http.impl.client.defaulthttpclient; import org.apache.http.util.entityutils;  public class mytest {      public static void main(string[] args) throws exception  {          putobject();          getobject();     }      public static void putobject() throws exception     {         httpclient httpclient = new defaulthttpclient();         person person = new person();        person.setname("narendra");        person.setid("1");          try         {             //define postrequest request             httpput putrequest = new httpput("http://localhost:9084/ehcache-server/rest/screeninginstance/2221");              //set api media type in http content-type header             putrequest.addheader("content-type", "application/x-java-serialized-object");              //set request put body             serializableentity personsentity = new serializableentity(serializationutils.serialize(person));             putrequest.setentity(personsentity);              //send request; return response in httpresponse object if             httpresponse response = httpclient.execute(putrequest);              //verify valid error code first             int statuscode = response.getstatusline().getstatuscode();             if (statuscode != 201)             {                 throw new runtimeexception("failed http error code : " + statuscode);             }         }                 {             //important: close connect             httpclient.getconnectionmanager().shutdown();         }     }      public static void getobject() throws exception     {         defaulthttpclient httpclient = new defaulthttpclient();         try         {             //define httpget request; can choose between httppost, httpdelete or httpput also.             //choice depends on type of method invoking.             httpget getrequest = new httpget("http://localhost:9084/ehcache-server/rest/screeninginstance/2221");              //set api media type in http accept header             getrequest.addheader("accept", "application/x-java-serialized-object");              //send request; return response in httpresponse object             httpresponse response = httpclient.execute(getrequest);              //verify valid error code first             int statuscode = response.getstatusline().getstatuscode();             if (statuscode != 200)             {                 throw new runtimeexception("failed http error code : " + statuscode);             }              //now pull response object              httpentity httpentity = response.getentity();             byte[] resultbytearray = entityutils.tobytearray(httpentity);             person person = (person)serializationutils.deserialize(resultbytearray);                    }                 {             //important: close connect             httpclient.getconnectionmanager().shutdown();         }     }  }  class person implements serializable{     string name;     string id;      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      public string getid() {         return id;     }      public void setid(string id) {         this.id = id;     }      @override     public string tostring() {         return "person [name=" + name + ", id=" + id + "]";     }   } 

i got solution. mistake in code:

while putting object, have written below code. doing 2 time serialization. first person object byte[] , second byte[] byte[].

serializableentity personsentity = new serializableentity(serializationutils.serialize(person));             putrequest.setentity(personsentity); 

this right approach:

serializableentity personsentity = new serializableentity(person);             putrequest.setentity(personsentity); 

after getting binary rest, code should below object:

httpentity httpentity = response.getentity(); inputstream inputstream = null; try {          inputstream = httpentity.getcontent();           person p = (person) serializationutils.deserialize(inputstream);          system.out.println("person:" + p.getname());     }     {         inputstream.close();     }    

this worked charm !!