积分串并接口，添加null判断

src/main/java/com/founder/interservice/gwdq/Controller/GwdqfxtjController.java

@@ -103,7 +103,7 @@ public class GwdqfxtjController {
         List<AutoTbStAsjforjfcb> list = new ArrayList<>();
         String content = gwdqService.RequestUtil(httpclient, post).trim();
         System.out.println("content=="+content);
-        if(!"".equals(content)){
+        if(null != content && !"".equals(content)){
             jsonArray = JSONArray.parseArray(content);
             if(jsonArray != null && jsonArray.size() > 0) {
                 for (int i = 0; i <= jsonArray.size() - 1; i++){