1
我想反序列化从ZeroMQ收到的谷歌protobuf消息,并试图转换为JSON格式,使用下面的一段代码。但在最终输出中,定义为字节的字段是不可读的。如何反序列化从Google protobuf以Java接收的字节?
(例如,
"source_id": "\u0000PV\uff98t\uff9e"
)。
由于它是机器生成的数据,我们没有从源发送的实际值。
InputStream is = new ByteArrayInputStream(message.getBytes());
Schema.nb_event data = Schema.nb_event.parseFrom(is);
String jsonFormat = JsonFormat.printToString(data);
输出
{ "seq": 6479250, "timestamp": 1488461706,"op": "OP_UPDATE","topic_seq": 595736,"source_id": "\u0000PV\uff98t\uff9e","location": {"sta_eth_mac": {"addr": "xxxxxxx"},"sta_location_x": 879.11456,"sta_location_y": 945.0676,"error_level": 1220,"associated": true,"campus_id": "\uff9f\uff94\uffc7\uffa3\uffa2\b6\uffe3\uff92U\uff9f\uffdcN\'MT","building_id": "\uffee\u0016??X}5\u001a\uffaa\uffc4^\uffa0n\uffa4\ufffb\'","floor_id": "\uffd9/\"uF\uffdd3\uffdd\uff96\u0015\uff83~\u0005\uff8a(\uffd0","hashed_sta_eth_mac": "\u0013h\u0017\uffd0\uffef\uffc8\u001f\u0005V\u0010w?xxxxxx","loc_algorithm": "ALGORITHM_LOW_DENSITY","unit": "FEET"}}
==
{ "seq": 6479250,
"timestamp": 1488461706,
"op": "OP_UPDATE",
"topic_seq": 595736,
"source_id": "\u0000PV\uff98t\uff9e",
"location": { "sta_eth_mac": { "addr": "\uffc0\uffcc\ufff8P\uffee." },
"sta_location_x": 879.11456,
"sta_location_y": 945.0676,
"error_level": 1220,
"associated": true,
"campus_id": "\uff9f\uff94\uffc7\uffa3\uffa2\b6\uffe3\uff92U\uff9f\uffdcN\'MT",
"building_id": "\uffee\u0016??X}5\u001a\uffaa\uffc4^\uffa0n\uffa4\ufffb\'",
"floor_id": "\uffd9/\"uF\uffdd3\uffdd\uff96\u0015\uff83~\u0005\uff8a(\uffd0",
"hashed_sta_eth_mac": "\u0013h\u0017\uffd0\uffef\uffc8\u001f\u0005V\u0010w?\uff88\uffa8\uffee\u000fm.\u0015\uffe9",
"loc_algorithm": "ALGORITHM_LOW_DENSITY",
"unit": "FEET"
}
}
所有不可读字段定义在.proto
文件字节。
获取这些值是否需要额外的步骤?
optional bytes building_id = 10;
optional bytes floor_id = 11;
optional bytes hashed_sta_eth_mac = 12;
嗯,是不透明的二进制数据。你为什么期望能够将它看作文本?基本上在Java中,他们将是一个'byte []'。无可否认,我希望JSON格式化程序可以将它们转换为base64格式,而不是你所显示的格式,但它仍然不会是可读的文本。 –
事实上,正常的'JsonFormat'确实应该将这些字节序列化为Base64:https://github.com/google/protobuf/blob/34a1b6e6b8c0d477504d09df4df4b86770e47872/java/util/src/main/java/com/google/protobuf/util /JsonFormat.java#L992是你正在使用的'JsonFormat'类,还是这是别的? (另一方面,'mesage'是一个'String'还是其他的东西?如果是这样,调用'getBytes()'就是个坏主意)。基本上,[mcve]会让你更容易帮助你。 –
需求是反序列化数据并在我们的数据湖中以JSON格式写成纯文本格式。是否有工作来获得实际价值? –