技術標籤：JsonNodejson字串

JsonNode解析json字串獲取指定欄位

字串如下：

{
    "code":"0",
    "msg":"成功",
    "result":{
        "fullStreamUrl":"rtmp://rtmpxxx/x/x",
        "audioTrack":[
            {
                "audioTrackIndex":1,
                "streamUrl":"rtmp://rtmpxxx/x/x-1"
            },
            {
                "audioTrackIndex":3,
                "streamUrl":"rtmp://rtmpxxx/x/x-3"
            }
        ]
    },
    "ok":true
}
 

獲取result中的fullStreamUrl，audioTrack兩個欄位資訊，程式碼如下：
xxx代表上面字串

        ObjectMapper objectMapper = new ObjectMapper();
        try {
            JsonNode jsonNode = objectMapper.readTree(xxx);
            String fullStreamUrl = jsonNode.path("result").path("fullStreamUrl").asText();
            System.
 
out.println("----------------->>>>fullStreamUrl:"+fullStreamUrl);
            //取audioTrack節點下資訊要根據子節點audioTrackIndex來獲取，用list接收即可取到
            List<JsonNode> findKeys = jsonNode.findParents("audioTrackIndex");
            String findKeys1 = jsonNode.path("result"
 
).path("audioTrack").toString();
            for (JsonNode jn : findKeys) {
                System.out.println("----------------->>>>:"+jn);
                System.out.println("------------->>>:"+jn.get("audioTrackIndex").asText());
                System.out.println("------------->>>:"+jn.get("streamUrl").asText());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

結果如下：

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