跨域訪問：jquery ajax jsonp的實現方法(jsp和action方式)

客戶端:

<mce:script language="javascript"><!-- $(function(){ $.ajax({ type: "get", url: "www.sssss.com/ddd.do", data: { area : "ddd", areaid : "2", categorySz : ["", "", "", "", "", "208", "", "", "205", "205", "206" ,"207,250,251,252,253" ,"207,254" ,"207,255" ,"207,256" ,"207,257" ,"207,258" ,"207,259"], typeSz : ["520,1201,201", "520,1201,202", "520,1202", "520,1203", "520,1204", "", "521,1201,201", "521,1201,202", "1201,202", "1202" , "" , "" , "" , "" , "" , "" , "" , ""], categoryOrSz : ["", "", "", "", "", "", "", "", "", "" , "" , "250,251,252,253" , "" , "" , "" , "" , "" , ""]}, dataType : "jsonp", jsonp: "callback", async: false, cache: false, success: function(data){ if (data != null && data != "") { } } }); }); // --></mce:script> 

服務器端:

代碼很簡單，就是輸出一個字符串
比如正常輸出json應該是：[{"id":"1","name":"測試1"},{"id":"2","name":"測試2"}]
jsonp 則輸出: jsonpcallback([{"id":"1","name":"測試1"},{"id":"2","name":"測試2"}]) 其中“jsonpcallback”是客戶端傳過來的

/** * * @param form * @param request * @param response * @return * @throws Exception */ public String ajaxGetMybusAllDataJsonp(ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { String callback = request.getParameter("callback"); JSONObject res = new JSONObject(); /* * 處理方法 * */ res.put("d", "dddd"); // 可以避免前臺顯示出現亂碼 response.setContentType("text/html"); response.setCharacterEncoding("utf-8"); PrintWriter out = response.getWriter(); out.print(callback + "(" + res.toString() + ")"); out.flush(); out.close(); return null; }