将BufferedReader解析为JSON对象时，位置处出现意外的令牌END OF FILE

Question

I am passing an object to the Java Servlet publishStory using Angularjs $http service. And however this same servlet code has worked fine with other requests but here I am getting the following error:

I have researched it on the internet but could not find solution to this particular case where I am using BufferedReader, as the same servlet works fine with other requests.

Here is my publishStory servlet:

public class publishStory extends HttpServlet{
protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{
    PreparedStatement pstmt = null;
    Connection cn = null;
    ResultSet rs = null;
    boolean flag = false;
    PrintWriter out = null;
    try{
        System.out.println("CALLING THE METHOD");
        Class.forName("com.mysql.jdbc.Driver");
        cn = DriverManager.getConnection("jdbc:mysql://localhost/storyboard","root","");

        BufferedReader reader = request.getReader();
        JSONParser parser = new JSONParser();
        JSONObject juser = null;

        juser = (JSONObject)parser.parse(reader);

        String welcomeStoryTitle = (String)juser.get("welcomeStoryTitle");
        String welcomeStoryWords = (String)juser.get("welcomeStoryWords");

        String query = "INSERT INTO stories (storytitle, storytext) VALUES (?,?)";
        pstmt = cn.prepareStatement(query);
        pstmt.setString(1, welcomeStoryTitle);
        pstmt.setString(2, welcomeStoryWords);
        int i = pstmt.executeUpdate();
        if(i>0)
            System.out.println(welcomeStoryTitle=" : "+welcomeStoryWords);
        else
            System.out.println("No data inserted");
    }
    catch(Exception e){
        e.printStackTrace();
    }
}

I am retrieving two request parameters welcomeStoryTitle and welcomeStoryWords in this servlet.

And below is my angularjs controller with a function implementing $http service:

app.controller('welcomeStoryPublishCtrl', ['$log','$http',function($log,$http){
    this.publishGroup = function(wsPublish){
        $http({
            method:'POST',
            url: 'http://localhost:9090/Writer/publishStory',
            header: {'Content-Type':'application/json'},
            data: wsPublish
        }).success(function(){});
    };
}]);

I am getting this error where I am parsing the reader object, at line:

juser = (JSONObject)parser.parse(reader);

Could this be because of the size of a String being retrieved from request?

Answer 1

'At position 0' is a giveaway. You are trying to parse an empty response.