为什么JSONArray从JSP中抛出ClassNotFound Exception？

Question

Map countryList = new HashMap();
String str = "http://10.10.10.25/TEPortalIntegration/CustomerPortalAppIntegrationService.svc/PaymentSchedule/PEPL/Unit336";
 try {
    URL url = new URL(str);

    URLConnection urlc = url.openConnection();

       BufferedReader bfr = new BufferedReader(new InputStreamReader(
                    urlc.getInputStream()));

    String line, des;
    double title;
    final StringBuilder builder = new StringBuilder(2048);

    while ((line = bfr.readLine()) != null) {
      builder.append(line);
    }

            // convert response to JSON array
    final JSONArray jsa = new JSONArray(builder.toString());

            // extract out data of interest
    for (int i = 0; i < jsa.length(); i++) {
        final JSONObject jo = (JSONObject) jsa.get(i);
        title = jo.getDouble("NetAmount");

        countryList.put(i, title);
    }
    System.out.println(countryList); /* Giving result if i run in Console*/
  } catch (Exception e) {
            // TODO: handle exception
        }
  renderRequest.setAttribute("out-string", countryList);

上面的代码是从Java客户端使用JSON Web服务.我可以从java控制台应用程序访问它.但是当尝试使用JSP或Liferay时它不起作用.在JSP中它给出java.lang.NoClassDefFoundError:org/json/JSONArray.请帮我修理一下.我是否需要将更多jar文件添加到库中以使其在JSP中运行？

Answer 1

您需要JSONArray根据此目录结构在Web应用程序中添加包含类的jar文件:

Tomcat_HOME
  ->
   webapps
     ->
       YourWebAppName
         ->
            WEB-INF
               ->lib
                  ->Here goes your jar file