Gson String to Object

Posted 2021-04-10

我坚持如何解决这个问题，我想我理解的问题是gson的格式不正确，例如在这种情况下缺少Bsid。我如何解决它，所以如果这个问题，所以它不会再发生？

Error:E/androidRuntime: FATAL EXCEPTION: main
Process: , PID: 32171 com.google.gson.JsonSyntaxException: java.io.EOFException: End of input at line 1 column 65536 path $[555].bBsid

正在使用的代码：

    if(json.length()== Integer.MAX_VALUE){
            Log.d(TAG, "Error");
            return null;
        } else {


            Log.i(TAG, json);

            Type arrayType = new TypeToken<List<WifiObject>>() {
            }.getType();
            Gson gson = new Gson();


            ArrayList<WifiObject> wifiObjectArrayList = new ArrayList<WifiObject>();
            List wifiObjectList = gson.fromJson(json, arrayType);
            for (int i = 0; i < wifiObjectList.size() - 1; i++) {

                if (wifiObjectList.get(i) != null) {
                    WifiObject wifiObject = (WifiObject) wifiObjectList.get(i);
                }

//                    Log.i(TAG, wifiObject.getBBSID());

//                    wifiObjectArrayList.add(wifiObject);
            }

            return wifiObjectArrayList;
        }

宾语：

  public WifiObject(String bBSID, String sSID, String capabilites, Integer frequency, Integer level){
    //Instead of this.bssid for example because the setters already have Log's in them
    setBBSID(bBSID);
    setSSID(sSID);
    setCapabilites(capabilites);
    setFrequency(Integer.toString(frequency));
    setLevel(Integer.toString(level));

}

试图转换这个：

 02-28 23:57:53.876 4259-4259/ I/WifiHandler: 
[{"bBsid":"00:62:ec:fd:ea:f0","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-45","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:f1","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-46","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:f2","capabilities":"[ESS]","frequency":"2462","level":"-46","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:f3","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2462","level":"-46","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ea:f4","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-46","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:50","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-53","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:ff","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5520","level":"-53","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:fd","capabilities":"[ESS]","frequency":"5520","level":"-53","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:53","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2437","level":"-54","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ea:51","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-55","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:52","capabilities":"[ESS]","frequency":"2437","level":"-55","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:fb","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5520","level":"-55","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:54","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-55","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:5d","capabilities":"[ESS]","frequency":"5240","level":"-56","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ea:fe","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5520","level":"-56","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:5e","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5240","level":"-57","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ea:5c","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"5240","level":"-57","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ea:5f","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5240","level":"-58","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ea:5b","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"5240","level":"-58","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ea:fc","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"5520","level":"-58","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ec:30","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-59","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ee:61","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2412","level":"-59","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ee:62","capabilities":"[ESS]","frequency":"2412","level":"-59","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ee:64","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2412","level":"-59","sSid":"SLaMFT"},{"bBsid":"00:62:ec:fd:ec:31","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-60","sSid":"KINGSWAP"},{"bBsid":"00:62:ec:fd:ee:60","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2412","level":"-60","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ee:63","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2412","level":"-60","sSid":"PLOCAL"},{"bBsid":"00:62:ec:fd:ec:32","capabilities":"[ESS]","frequency":"2437","level":"-60","sSid":"The Cloud"},{"bBsid":"00:62:ec:fd:ec:34","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2437","level":"-61","sSid":"SLaMFT"},{"bBsid":"00:42:68:a6:a6:41","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-62","sSid":"KINGSWAP"},{"bBsid":"00:42:68:a6:a6:42","capabilities":"[ESS]","frequency":"2462","level":"-62","sSid":"The Cloud"},{"bBsid":"00:42:68:a6:a6:43","capabilities":"[WPA2-EAP-CCMP][WPA-EAP-TKIP][ESS]","frequency":"2462","level":"-62","sSid":"PLOCAL"},{"bBsid":"00:42:68:a6:a6:44","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-62","sSid":"SLaMFT"},{"bBsid":"00:42:68:a6:a6:40","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-62","sSid":"eduroam"},{"bBsid":"00:62:ec:fd:ec:33","capabilities":"[WPA2-EAP

答案

让我在短期内澄清这一点;

 Gson gson = new Gson();
 String json ="[{"bBsid":"00:62:ec:fd:ea:f0","capabilities":"[WPA2-EAP-CCMP][ESS]","frequency":"2462","level":"-45","sSid":"eduroam"}]"; // Your Json String

        if (json.equalsIgnoreCase("")) {
            return null;
        }
        YourClassName obj = gson.fromJson(json, YourClassName.class);

return obj;

这里，obj是你的类对象，它被转换为类对象，打印它的日志并检查它。希望这会帮助你。

另一答案

可能的原因是Json字符串被截断。截断可能只发生在Log打印时，但我认为现在情​​况并非如此。

也就是说，如果你从Json中删除最后一个不完整的WifiObject并添加关闭的]，那么右反序列化，使用34个WifiObjects。

您应该跟踪生成Json的位置，并查看它们之间发生的情况。我遇到了同样的问题，但是我记不起在我的情况下是什么原因（如果我发现它会回来）。

我怀疑有一些东西就像在SharedPreferences中存储这个长字符串，但是你还没有为Json代和后来的操作提供代码，所以很难说更具体的内容。