优化

src/main/java/com/bw/ocr/service/impl/OcrTaskServiceImpl.java

@@ -81,7 +81,9 @@ public class OcrTaskServiceImpl implements OcrTaskService {
         		param.put(Constants.PDF_FILE_NUM, pagenum);
         		String resStr = DownLoadUtil.doPostFrom(url, param);
         		JSONObject res = JSONObject.parseObject(resStr);
-        		maxpagenum = (int) res.get(Constants.PDF_FILE_SIZE);
+        		if(res.containsKey(Constants.PDF_FILE_SIZE)) {
+        			maxpagenum = (int) res.get(Constants.PDF_FILE_SIZE);
+        		}
         		List<Map<String, Object>> wordsResult = (List<Map<String, Object>>) res.get(Constants.WORDS_RESULT);
         		for (Map<String, Object> map : wordsResult) {
         			content.append(map.get(Constants.WORDS));