将MongoDB ObjectId序列化为字符串 [英] Serialize MongoDB ObjectId to string

问题描述

我正在使用mongo-driver 3.2.2从Spring Boot应用程序连接到MongoDB.

I'm connecting to MongoDB from a Spring Boot application using mongo-driver 3.2.2.

public List<Document> getNodes() {
    return mongoDatabase.getCollection("nodes").find().into(new ArrayList<Document>());
}

...

@RequestMapping("/nodes")
public List<Document> nodes(HttpServletResponse response) {
    return mongoRepository.getNodes();
}

当前，我的API返回_id作为对象:

Currently my API returns _id as objects:

"_id":{"timestamp":1486646209,"machineIdentifier":14826340,"processIdentifier":16048,"counter":2373754,"time":1486646209000,"date":1486646209000,"timeSecond":1486646209}

但是我需要它们作为十六进制字符串.有什么方法可以操纵序列化来实现这一目标?我没有使用实体类.

but I need them as hex strings. Is there any way I can manipulate the serialization to achieve this? I'm not using entity classes.

推荐答案

是的，可以.使用以下代码段:

Yes, sure. Use this snippet:

ObjectId objectId = new ObjectId(); // somehow got it
String stringValue = objectId.toHexString();
// And vice versa
ObjectId restoredObjectId = new ObjectId(stringValue);

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