thrift:返回null的解决办法

        if (successCodec.getType() == ThriftType.VOID) {
            // TODO: check for non-null return from a void function?
            return null;
        }

        if (results == null) {
            throw new TApplicationException(TApplicationException.MISSING_RESULT, name + " failed: unknown result");
            // result为null抛出异常，异常错误代码:TApplicationException.MISSING_RESULT
        }

    public List<Integer> loadAllPerson(){
        try{
            return service.loadAllPerson();
        }
        // 捕获RuntimeTApplicationException异常
        catch(RuntimeTApplicationException e){
            Throwable cause = e.getCause();
            // cause 类型为 TApplicationException时再判断异常类型时是否为MISSING_RESULT，
            // 是就返回null,否则继续向上抛出
            if (cause instanceof TApplicationException  
                && ((TApplicationException) cause).getType() == TApplicationException.MISSING_RESULT){
                return null;
            }
            throw e;
        }
        catch(net.gdface.facelog.client.thrift.ServiceRuntime e){
            throw new ServiceRuntime(e);
        }
    }