Return JSONArray instead of JSONObject, Jersey JAX-RS
arrays, jax-rs, jersey
Solution
You can define your service method as follows, using Person POJO:
@GET
@Produces("application/json")
@Path("/list")
public String getList(){
List<Person> persons = new ArrayList<>();
persons.add(new Person("1", "2"));
persons.add(new Person("3", "4"));
persons.add(new Person("5", "6"));
// takes advantage to toString() implementation to format as [a, b, c]
return persons.toString();
}
The POJO class:
@XmlRootElement
public class Person {
@XmlElement(name="fn")
String fn;
@XmlElement(name="ln")
String ln;
public Person(){
}
public Person(String fn, String ln) {
this.fn = fn;
this.ln = ln;
}
@Override
public String toString(){
try {
// takes advantage of toString() implementation to format {"a":"b"}
return new JSONObject().put("fn", fn).put("ln", ln).toString();
} catch (JSONException e) {
return null;
}
}
}
The results will look like:
[{"fn":"1","ln":"2"}, {"fn":"3","ln":"4"}, {"fn":"5","ln":"6"}]
Problem
I am using Jersey to make some of my services RESTful. My REST service call returns me ``` {"param1":"value1", "param2":"value2",...."paramN":"valueN"} ``` But, I want it to return ``` ["param1":"value1", "param2":"value2",...."paramN":"valueN"] ``` What are the changes I need to make in the code below? ``` @GET @Produces(MediaType.APPLICATION_JSON) public List<com.abc.def.rest.model.SimplePojo> getSomeList() { /* Do something */ return listOfPojos; } ``` Part of my web.xml file looks like this ``` <servlet> <servlet-name>Abc Jersey REST Service</servlet-name> <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class> <init-param> <param-name>com.sun.jersey.config.property.packages</param-name> <param-value>com.abc.def.rest</param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> ``` Thanks!