java - Return POJO as JSON in Spring MVC 4 -

i have simple object, want return json

public class event {      private string store;     private date date;     private double fee;     private string kit;     private string information; 

and test controller follows

@restcontroller @enablewebmvc public class usercontroller {      @requestmapping(value = "/user/{username}", method = requestmethod.get, produces = "application/json", headers="accept=*/*")     @responsebody     public event getuser(@pathvariable("username") string username){          event event = new event("dummy", new date(), 4.0, "dummy", "dummy");         return event;     }  } 

i "the resource identified request capable of generating responses characteristics not acceptable according request "accept" headers."

my servlet has entry

<mvc:annotation-driven />     

how can achieve desired output?

added

dependency>         <groupid>com.fasterxml.jackson.core</groupid>         <artifactid>jackson-annotations</artifactid>         <version>2.7.0</version>     </dependency>     <dependency>         <groupid>com.fasterxml.jackson.core</groupid>         <artifactid>jackson-core</artifactid>         <version>2.7.0</version>     </dependency>     <dependency>         <groupid>com.fasterxml.jackson.core</groupid>         <artifactid>jackson-databind</artifactid>         <version>2.7.0</version>     </dependency>