Convert java script object to XML

Hi I am trying to convert the json string to object in java using the below code but its not working . So I am thinking of changing my js object to xml instaed of json string( used json stringify)

java :

   ObjectMapper mapper = new ObjectMapper();
   ToogleProcessedImage l_oToogleProcessedImage = mapper.readValue(l_sParamProcessedImage, ToogleProcessedImage.class);

jsp:

var l_sProcessedImage = JSON.stringify(m_oProcessedImage);

Please see where am I going wrong or please let me know how can I change the js object to xml so that in java side I can use

 ToogleProcessedImage l_oToogleProcessedImage = XStreamUtils.fromXML(l_sParamProcessedImage, ToogleProcessedImage.class);