public static List<JSONObject> readTracerDigest(File file) {

        LOGGER.info("start to read tracer file," + file.toURI());

        List<JSONObject> jsonObjects = new ArrayList<JSONObject>();

        List<String> contents = null;
        try {
            contents = FileUtils.readLines(file);
        } catch (IOException e) {
            e.printStackTrace();
        }

        for (String content : contents) {
            jsonObjects.add(JSON.parseObject(content));
        }

        LOGGER.info("end to read tracer file,jsonObjects" + jsonObjects);

        return jsonObjects;
    }
readTracerDigest all rpc client and rpc server digest to jsonObject

@param file
@return
test/test-integration/src/test/java/com/alipay/sofa/rpc/server/tracer/util/TracerChecker.java