在 spring 引导中解析 json 响应的最佳方法

Question

I am consuming a rest-end point using rest template which returns below josn messages. object Wrappers is better approach or json object parsing is better?

[
      {
      "id": "UAMwcI",
      "messageId": "PyXPTk-6XUBhbONWZ2DOw3___pFykwV5bQ",
      "timestamp": 1574330759814,
      "type": "MESSAGESENT",
      "initiator": {"user":       {
         "userId": 345315370604341,
         "firstName": "Sanjeet",
         "lastName": "Mohanty",
         "displayName": "Sanjeet Mohanty",
         "email": "Sanjeet.mohanty@db.com",
         "username": "Sanjeet.mohanty@db.com"
      }},
      "payload": {"messageSent": {"message":       {
         "messageId": "PyXPTk-6XUBhbONWZ2DOw3___pFykwV5bQ",
         "timestamp": 1574330759814,
         "message": "<div data-format=\"PresentationML\" data-version=\"2.0\" class=\"wysiwyg\"><p>test 2 <\/p><\/div>",
         "data": "{}",
         "user":          {
            "userId": 345315370604341,
            "firstName": "Sanjeet",
            "lastName": "Mohanty",
            "displayName": "Sanjeet Mohanty",
            "email": "Sanjeet.mohanty@db.com",
            "username": "Sanjeet.mohanty@db.com"
         },
         "stream":          {
            "streamId": "cL7jzEDwLxX_gN7D1QbMQn___pP73Ad6dA",
            "streamType": "IM"
         },
         "externalRecipients": false,
         "userAgent": "DESKTOP-40.0.0-10726-Windows-7-Chrome-76.0.3809.87",
         "originalFormat": "com.symphony.messageml.v2"
      }}}
   },
      {
      "id": "Bvua7t",
      "messageId": "8usJ_xioHKkRrevhyn38wn___pFykv-WbQ",
      "timestamp": 1574330761321,
      "type": "MESSAGESENT",
      "initiator": {"user":       {
         "userId": 345315370604341,
         "firstName": "Sanjeet",
         "lastName": "Mohanty",
         "displayName": "Sanjeet Mohanty",
         "email": "Sanjeet.mohanty@db.com",
         "username": "Sanjeet.mohanty@db.com"
      }},
      "payload": {"messageSent": {"message":       {
         "messageId": "8usJ_xioHKkRrevhyn38wn___pFykv-WbQ",
         "timestamp": 1574330761321,
         "message": "<div data-format=\"PresentationML\" data-version=\"2.0\" class=\"wysiwyg\"><p>test 3<\/p><\/div>",
         "data": "{}",
         "user":          {
            "userId": 345315370604341,
            "firstName": "Sanjeet",
            "lastName": "Mohanty",
            "displayName": "Sanjeet Mohanty",
            "email": "Sanjeet.mohanty@db.com",
            "username": "Sanjeet.mohanty@db.com"
         },
         "stream":          {
            "streamId": "cL7jzEDwLxX_gN7D1QbMQn___pP73Ad6dA",
            "streamType": "IM"
         },
         "externalRecipients": false,
         "userAgent": "DESKTOP-40.0.0-10726-Windows-7-Chrome-76.0.3809.87",
         "originalFormat": "com.symphony.messageml.v2"
      }}}
   }
]

Answer 1

there is a lot of Liberaiyes to serialize deserialize JSON.

if you have Pojo class match the return value from your rest API you could use for instance Jackson to do the job

PojoClass mypojo = new ObjectMapper().readValue(JsonString, PojoClass.class);

OR simply converted to JSonNode and iterate over the Nodes

JsonNode jsonNode = new ObjectMapper().readTree(JsonString); 

check the link for more info https://www.baeldung.com/jackson-object-mapper-tutorial