Ajax background processing returns json value how to write the sample code

This article will explain in detail how to write the sample code for the return Json value of ajax background processing. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

The code is as follows:

Public ActionForward xsearch (ActionMapping mapping, ActionForm form

HttpServletRequest request, HttpServletResponse response)

Throws Exception {

String parentId = request.getParameter ("parentId")

String supplier = request.getParameter ("supplier")

List itemList = new ArrayList ()

If (parentId.equals ("")) {

ParentId= "0"

}

Map map=new TawApTreeServlet () .getTypeList (parentId supplier)

For (Iterator rowIt = map.keySet (). Iterator (); rowIt.hasNext ();) {

String id = (String) rowIt.next ()

TawCommonsUIListItem uiitem = new TawCommonsUIListItem ()

Uiitem.setItemId (id)

Uiitem.setText ((String) map.get (id))

Uiitem.setValue (id)

ItemList.add (uiitem)

}

Response.setContentType ("text/xml;charset=UTF-8")

/ / return JSON object

Response.getWriter () .print (JSONUtil.list2JSON (itemList))

Return null

}

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