[英]Jackson converting dynamic json to map
我有一個問題,其中json的某些結構是固定的,而某些部分是動態的。 最終輸出必須是類型的對象
Map<String,List<Map<String,String>>>
我正在粘貼傑克遜工作的示例json代碼-
{
"contentlets": [
{
"template": "8f8fab8e-0955-49e1-a2ed-ff45e3296aa8",
"modDate": "2017-01-06 13:13:20.0",
"cachettl": "0",
"title": "New Early Warnings",
"subscribeToListIi": "am@zz.com",
"inode": "15bd497-1d8e-4bc7-b0f4-c799ed89fdc9",
"privacySetting": "public",
"__DOTNAME__": "New gTLD Early Warnings",
"activityStatus": "Completed",
"host": "10b6f94a-7671-4e08-9f4b-27bca80702e7",
"languageId": 1,
"createNotification": false,
"folder": "951ff45c-e844-40d4-904f-92b0d2cd0c3c",
"sortOrder": 0,
"modUser": "dotcms.org.2897"
}
]
}
ObjectMapper mapper = new ObjectMapper();
Map<String,List<Map<String,String>>> myMap=mapper.readValue(responseStr.getBytes(), new TypeReference<HashMap<String,List<Map<String,String>>>>() {});
上面的代碼工作正常,但是當json更改為(基本上添加了元數據標記)時,它無法轉換為map。
{
"contentlets": [
{
"template": "8f8fab8e-0955-49e1-a2ed-ff45e3296aa8",
"modDate": "2017-01-06 13:13:20.0",
"cachettl": "0",
"title": "New gTLD Early Warnings",
"subscribeToListIi": "aml@bb.com",
"inode": "15bd4057-1d8e-4bc7-b0f4-c799ed89fdc9",
"metadata": {
"author": "jack",
"location": "LA"
},
"privacySetting": "public",
"__DOTNAME__": "New gTLD Early Warnings",
"activityStatus": "Completed",
"host": "10b6f94a-7671-4e08-9f4b-27bca80702e7",
"languageId": 1,
"createNotification": false,
"folder": "951ff45c-e844-40d4-904f-92b0d2cd0c3c",
"sortOrder": 0,
"modUser": "dotcms.org.2897"
}
]
}
這是可以預期的,因為元數據值的類型不是String
。 如果您相應地更改地圖的類型,那么它將起作用:
Map<String,List<Map<String,Object>>> myMap = mapper.readValue(reader, new TypeReference<HashMap<String,List<Map<String,Object>>>>() {});
當然,您會遇到映射中的值不是同一類型的問題。 因此,您需要問自己自己想要的數據結構是什么以及如何進一步處理它。 但是,不能將json結構反序列化為簡單的String
。
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