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GSON-从JSON对象中删除JSON数据

gson json java

Colin747 · 技术社区 · 6 年前

{"blobJson":"{\"sensorID\":\"111122\",\"width\":32,\"height\":31,\"frameData\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]}","deviceMfg":2,"eventCode":101,"sensorClass":1,"sensorUUID":"111122","timeStamp":1.53907307310099994E18,"uID":"111122_1_2"}

我想把它移走 [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

目前我正在使用以下代码:

    JsonParser jp = new JsonParser(); //from gson
    JsonElement root = jp.parse(new InputStreamReader((InputStream) request.getContent())); 
    JsonObject rootobj = root.getAsJsonObject();
    System.out.println(rootobj);

{"blobJson":"","deviceMfg":-1,"eventCode":-1,"sensorClass":-1,"sensorUUID":"","timeStamp":0.0,"uID":"_-1_-1"}

2 回复 | 直到 6 年前

YK S 6 年前

如果要删除 framedata key and value 从弦上。你可以用 org.json.JSONObject 如下图所示:

JSONObject jo1 = new JSONObject("{\"blobJson\":{\"sensorID\":\"111122\",\"width\":32,\"height\":31,\"frameData\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]},\"deviceMfg\":2,\"eventCode\":101,\"sensorClass\":1,\"sensorUUID\":\"111122\",\"timeStamp\":1.53907307310099994E18,\"uID\":\"111122_1_2\"}");
jo1.getJSONObject("blobJson").remove("frameData");

key framedata 但我只想要 value [] 然后执行以下操作:

JSONObject jo1 = new JSONObject("{\"blobJson\":{\"sensorID\":\"111122\",\"width\":32,\"height\":31,\"frameData\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]},\"deviceMfg\":2,\"eventCode\":101,\"sensorClass\":1,\"sensorUUID\":\"111122\",\"timeStamp\":1.53907307310099994E18,\"uID\":\"111122_1_2\"}");
jo1.getJSONObject("blobJson").put("frameData", "[]");

你可以用 ObjectMapper com.fasterxml.jackson.databind 但是您还需要相应的类以及与json键对应的所有成员变量。在上述方法中,您可以直接操作Json字符串。

GauravRai1512 6 年前

String stringifyRequest="{"blobJson":"{\"sensorID\":\"111122\",\"width\":32,\"height\":31,\"frameData\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]}","deviceMfg":2,"eventCode":101,"sensorClass":1,"sensorUUID":"111122","timeStamp":1.53907307310099994E18,"uID":"111122_1_2"}";

 final ObjectMapper mapper = new ObjectMapper();
        "Yourpojoclass" investmentResponse = mapper.readValue(stringifyRequest, "Yourpojoclass".class);

现在将frameData值设置为null,并使pojo类@JsonInclude(value=Include.NON\u为null)

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