java - REST API is unable to work in JSON format -

i new developing rest api java. made simple 1 using mkyong tutorials, says "hello". using apache tomcat.

now trying develop 1 return json objects. attempting example here - http://www.mkyong.com/webservices/jax-rs/json-example-with-jersey-jackson/. of code changed (ex: package name).below code.

track.java

package com.tutorialspoint;  /**  *  * @author yohan  */ public class track {      string title;     string singer;      public string gettitle() {         return title;     }      public void settitle(string title) {         this.title = title;     }      public string getsinger() {         return singer;     }      public void setsinger(string singer) {         this.singer = singer;     }      @override     public string tostring() {         return "track [title=" + title + ", singer=" + singer + "]";     }  } 

jsonservice.java

package com.tutorialspoint;  import javax.ws.rs.consumes; import javax.ws.rs.get; import javax.ws.rs.post; import javax.ws.rs.path; import javax.ws.rs.produces; import javax.ws.rs.core.mediatype; import javax.ws.rs.core.response;  /**  *  * @author yohan  */ @path("/json/metallica") public class jsonservice {      @get     @path("/get")     @produces(mediatype.application_json)     public track gettrackinjson() {          track track = new track();         track.settitle("enter sandman");         track.setsinger("metallica");          return track;      }      @post     @path("/post")     @consumes(mediatype.application_json)     public response createtrackinjson(track track) {          string result = "track saved : " + track;         return response.status(201).entity(result).build();      }  } 

web.xml

    <?xml version="1.0" encoding="utf-8"?> <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name>restful web application</display-name>      <servlet>         <servlet-name>newservlet</servlet-name>         <servlet-class>newservlet</servlet-class>     </servlet>      <servlet>       <servlet-name>jersey restful application</servlet-name>       <servlet-class>org.glassfish.jersey.servlet.servletcontainer</servlet-class>          <init-param>             <param-name>jersey.config.server.provider.packages</param-name>             <param-value>com.tutorialspoint</param-value>          </init-param>          <init-param>         <param-name>com.sun.jersey.api.json.pojomappingfeature</param-name>         <param-value>true</param-value>     </init-param>        </servlet>     <servlet-mapping>         <servlet-name>newservlet</servlet-name>         <url-pattern>/newservlet</url-pattern>     </servlet-mapping>     <servlet-mapping>    <servlet-name>jersey restful application</servlet-name>       <url-pattern>/rest/*</url-pattern>    </servlet-mapping>     <session-config>         <session-timeout>             30         </session-timeout>     </session-config> </web-app> 

my application not marven project. added libraries below.

i tested application below url.

http://localhost:8080/restful_api_sample/rest/json/metallica/get

all got below page

any idea why not getting expected result?

currently don't have json/pojo support. jersey-json jar , pojomappingfeature configuration in web.xml jersey 1.x, won't work jersey 2.x. jars need jersey 2.x support, see this answer.