How to use JIRA REST API to fetch the issues in Json from the JIRA?

[manoj singh]

This question is in reference to Atlassian Documentation: How to export JIRA application issues to JSON

I am very new to JIRA and REST. I googled it and learned few things. In most of the code snippet I saw it uses the localhost URL to get an issue, how do API JIRA response from localhost ?.
Also in some example I saw the URL like (https://jira.atlassian.com/rest/api/latest/issue/JRA-9.json) on this I can see JSON response to it but when I am trying access my issues with the same URL I don't see JSON response for it. eg: my issue URL is (http://jira-wifi.lmera.ericsson.se/browse/BN-1xxxx) on this I can my issues on GUI but when accessing API URL (https://jira.atlassian.com/rest/api/latest/issue/BN-1xxxx.json) I get a response 

{"errorMessages":["Issue Does Not Exist"],"errors":{}}.

Can someone please help on this ? 

[Nic Brough -Adaptavist-]

The example you've found looks wrong to me.

Try the same url, but with no .json on the end.

[manoj singh]

Hi Nic,

The URL didn't work in that way as well. I am using a sample code and URL (https://jira.atlassian.com/rest/api/latest/issue/JRA-9.json) on which i am getting a json response but code doesn't work on line final JiraRestClient restClient = factory.createWithBasicHttpAuthentication(jiraServerUri, "admin", "admin");

Below is my code(Source Google).

import com.atlassian.jira.rest.client.JiraRestClient;
import com.atlassian.jira.rest.client.JiraRestClientFactory;
import com.atlassian.jira.rest.client.NullProgressMonitor;
import com.atlassian.jira.rest.client.domain.BasicIssue;
import com.atlassian.jira.rest.client.domain.BasicProject;
import com.atlassian.jira.rest.client.domain.Comment;
import com.atlassian.jira.rest.client.domain.Issue;
import com.atlassian.jira.rest.client.domain.SearchResult;
import com.atlassian.jira.rest.client.domain.Transition;
import com.atlassian.jira.rest.client.domain.input.FieldInput;
import com.atlassian.jira.rest.client.domain.input.TransitionInput;
import com.atlassian.jira.rest.client.internal.jersey.JerseyJiraRestClientFactory;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.Collection;

public class Example1 {
public static void main(String[] args) throws URISyntaxException {
final JiraRestClientFactory factory = new JerseyJiraRestClientFactory();
final URI jiraServerUri = new URI("https://jira.atlassian.com/rest/api/latest/issue/JRA-9.json");
final JiraRestClient restClient = factory.createWithBasicHttpAuthentication(jiraServerUri, "admin", "admin");
final NullProgressMonitor pm = new NullProgressMonitor();
final Issue issue = restClient.getIssueClient().getIssue("TST-1", pm);

System.out.println(issue);

// now let's vote for it
restClient.getIssueClient().vote(issue.getVotesUri(), pm);

// now let's watch it
restClient.getIssueClient().watch(issue.getWatchers().getSelf(), pm);

// now let's start progress on this issue
final Iterable<Transition> transitions = restClient.getIssueClient().getTransitions(issue.getTransitionsUri(), pm);
final Transition startProgressTransition = getTransitionByName(transitions, "Start Progress");
restClient.getIssueClient().transition(issue.getTransitionsUri(), new TransitionInput(startProgressTransition.getId()), pm);

// and now let's resolve it as Incomplete
final Transition resolveIssueTransition = getTransitionByName(transitions, "Resolve Issue");
Collection<FieldInput> fieldInputs = Arrays.asList(new FieldInput("resolution", "Incomplete"));
final TransitionInput transitionInput = new TransitionInput(resolveIssueTransition.getId(), fieldInputs, Comment.valueOf("My comment"));
restClient.getIssueClient().transition(issue.getTransitionsUri(), transitionInput, pm);

}

private static Transition getTransitionByName(Iterable<Transition> transitions, String transitionName) {
for (Transition transition : transitions) {
if (transition.getName().equals(transitionName)) {
return transition;
}
}
return null;
}

}

[Nic Brough -Adaptavist-]

You are using the wrong url.  Your code is irrelevant if you are looking at the wrong url.

Remove the .json