JSON Formatting with Jersey, Jackson, & json.org/java Parser using Curl Command
- by socal_javaguy
Using Java 6, Tomcat 7, Jersey 1.15, Jackson 2.0.6 (from FasterXml maven repo), & www.json.org parser, I am trying to
pretty print the JSON String so it will look indented by the curl -X GET command line.
I created a simple web service which has the following architecture:
My POJOs (model classes):
Family.java
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Family {
private String father;
private String mother;
private List<Children> children;
// Getter & Setters
}
Children.java
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Children {
private String name;
private String age;
private String gender;
// Getters & Setters
}
Using a Utility Class, I decided to hard code the POJOs as follows:
public class FamilyUtil {
public static Family getFamily() {
Family family = new Family();
family.setFather("Joe");
family.setMother("Jennifer");
Children child = new Children();
child.setName("Jimmy");
child.setAge("12");
child.setGender("male");
List<Children> children = new ArrayList<Children>();
children.add(child);
family.setChildren(children);
return family;
}
}
My web service:
import java.io.IOException;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jettison.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import com.myapp.controller.myappController;
import com.myapp.resource.output.HostingSegmentOutput;
import com.myapp.util.FamilyUtil;
@Path("")
public class MyWebService {
@GET
@Produces(MediaType.APPLICATION_JSON)
public static String getFamily() throws IOException,
JsonGenerationException,
JsonMappingException,
JSONException,
org.json.JSONException {
ObjectMapper mapper = new ObjectMapper();
String uglyJsonString = mapper.writeValueAsString(FamilyUtil.getFamily());
System.out.println(uglyJsonString);
JSONTokener tokener = new JSONTokener(uglyJsonString);
JSONObject finalResult = new JSONObject(tokener);
return finalResult.toString(4);
}
}
When I run this using:
curl -X GET http://localhost:8080/mywebservice
I get this in my Eclipse's console:
{"father":"Joe","mother":"Jennifer","children":[{"name":"Jimmy","age":"12","gender":"male"}]}
But from the curl command on the command line (this response is more important):
"{\n \"mother\": \"Jennifer\",\n \"children\": [{\n \"age\": \"12\",\n \"name\": \"Jimmy\",\n \"gender\": \"male\"\n }],\n \"father\": \"Joe\"\n}"
This is adding newline escape sequences and placing double quotes (but not indenting like it should it does have 4 spaces after the new line but its all in one line).
Would appreciate it if someone could point me in the right direction.
