JAVA将String转换为json并用gson解析

本文展示了如何将前台传递的JSON数据转换为字符串,再使用Gson库将其解析为Map对象。首先,将JSON数据转化为JSONArray,然后获取其中的字符串,接着通过Gson的fromJson方法将字符串转换成Map,最后打印Map中的'deviceCode'值。

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前台传递过来的数据:
[{"aceneId":"","deviceCode":"27","deviceFirm":"春泉","deviceId":"1","deviceKind":"温控器","deviceName":"温控器001",
"deviceStation":"d8-b0-4c-b4-bc-a9","id":"110","isOn":"0","pattern":"制冷","permission":"1,00,99,0","registerAddress"
:"0081","registerNumber":"4","speed":"高档","temperature":"20","type":"0"},
{"aceneId":"","deviceCode":"16","deviceFirm":"春泉","deviceId":"2","deviceKind":"温控器","deviceName":"温控器002",
"deviceStation":"d8-b0-4c-b4-bc-a9","id":"111","isOn":"0","pattern":"制冷","permission":"1,00,99,0",
"registerAddress":"0081","registerNumber":"4","speed":"高档","temperature":"20","type":"0"}]
JSONArray jsonArray = JSONArray.fromObject(deviceList);
String jsonString =  jsonArray.getString(0);
Map deviceMap = new HashMap<>();
Gson gson = new Gson();
deviceMap = gson.fromJson(jsonString, deviceMap.getClass());
System.out.println(deviceMap.get("deviceCode").toString());
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