使用 Java ObjectMapper 获取 JSON 字符串

Question

I am using writeValueAsString of the ObjectMapper . However, it's giving me a Java String representation so I get:

{"network_id":5000370004610700049753}

instead of

"{\"network_id\":5000370004610700049753}"

which is failing for other services when deserializing. How do I get this kind of serialization with the ObjectMapper ?

Answer 1

To get the second result, send it through the ObjectMapper again.

Map<String, Object> data = new HashMap<>();
data.put("network_id", new BigInteger("5000370004610700049753"));

ObjectMapper objectMapper = new ObjectMapper();

String plainJson = objectMapper.writeValueAsString(data);
System.out.println(plainJson);

String encodedJson = objectMapper.writeValueAsString(plainJson);
System.out.println(encodedJson);

Output

{"network_id":5000370004610700049753}
"{\"network_id\":5000370004610700049753}"