display byte array as image in angular js

I have an image in database. I want to retreive the image and display it in web page using angular js. After fetching data i have byte array. How do i send the data to the html page. I am having issues with the below code.. Kindly help.
When i click the link to view the image, page is sending 2 get requests to the server instead of one. It is sending request continuously for 2 times.

Note : I have tried using the below link.. But it didn't work

AngularJS - Show byte array content as image

Below is my js file

app.controller('aboutCtrl', function($scope,$http,$location) {
$scope.message = 'This is Add new order screen';
 var url = '/Angular/login';  
    $http.get(url).success(function(result) {  

        $scope.image = result.image;
    })  
});
//html
<img data-ng-src="data:image/PNG;base64,{{image}}">

Java class file

 public String getImage() throws FileNotFoundException{
    String byteStr=null;
    try
    {
        Connection con= DbConnect.getConnection();
        String sql ="select * from image_data where id=1";
        PreparedStatement ps=con.prepareStatement(sql);  
        ResultSet rs = ps.executeQuery();

        while(rs.next())
        { 
            Blob b=rs.getBlob(2);
            byte barr[]=b.getBytes(1,(int)b.length());

             byteStr = new String(barr);
        }  
    }catch(Exception e){
        e.printStackTrace();    
    }
    return byteStr;

}

Servlet Code

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    System.out.println("inside get");
    JSONObject result= new JSONObject();
    Retreive rt = new Retreive();
    result.put("image", rt.getImage());
    response.setContentType("application/json");
    PrintWriter out = response.getWriter();
    out.write(result.toString());
    out.flush();
    out.close();

}