java - 从文本文件中读取 json

Question

我正在尝试制作一个从 Web 服务读取 json 的应用程序，将其保存到文件中，然后读取该文件并解析 json。

保存文件的原因是我要读取几个具有相同布局的 json 源。

代码:

public void lesstatusDescription(String sporingsnummer) {
    InputStream oFile;
    try {
        oFile = openFileInput(sporingsnummer + ".json");
        InputStreamReader oReader = new InputStreamReader(oFile);
        BufferedReader oBuffer = new BufferedReader(oReader);
        String sText = "";
        String sEachLine = "";
        while ((sEachLine = oBuffer.readLine()) != null) {
            sText += sEachLine;
        }
        oReader.close();
        final JSONObject object = new JSONObject(sText);
        JSONArray consignmentSet = object.getJSONArray("consignmentSet");
        Integer i = consignmentSet.length();
        TextView tv = (TextView)findViewById(R.id.textView);
        tv.setText(i.toString());

    } catch (Exception ex) {
        //handle exception here
        Toast.makeText(getApplicationContext(),ex.toString(),Toast.LENGTH_SHORT).show();
    }
}

我似乎收到错误:org.json.JSONException: Value 类型为 java.lang.String 无法转换为 JSONObject

编辑:添加了 json 文件:

{"consignmentSet":[{"consignmentId":"70300490908546098","previousConsignmentId":"","totalWeightInKgs":0.0,"totalVolumeInDm3":1.2,"packageSet":[{"statusDescription":"","descriptions":[],"packageNumber":"RA608072968SG","previousPackageNumber":"","productName":"REKOMMANDERT BREV FRA UTLANDET","productCode":"2567","brand":"POSTEN","lengthInCm":32,"widthInCm":12,"heightInCm":3,"volumeInDm3":1.2,"weightInKgs":0.0,"dateOfReturn":"03.07.2013","recipientAddress":{"addressLine1":"","addressLine2":"","postalCode":"1458","city":"FJELLSTRAND","countryCode":"NO","country":"Norway"},"eventSet":[{"description":"Sendingen er utlevert","status":"DELIVERED","recipientSignature":{"name":""},"unitId":"171108","unitType":"BRING","postalCode":"1450","city":"NESODDTANGEN","countryCode":"NO","country":"Norway","dateIso":"2013-06-20T15:08:48+02:00","displayDate":"20.06.2013","displayTime":"15:08","consignmentEvent":false},{"description":"Sendingen er ankommet <a title=\"Her finner du Nesoddtangen postkontor\" href=\"https://www.posten.no/kundeservice/postkontor-info-iframe?enhetsnr=171108\" class=\"sporing-lightbox-postoffice\">Nesoddtangen postkontor</a>","status":"READY_FOR_PICKUP","recipientSignature":{"name":""},"unitId":"171108","unitInformationUrl":"http://fraktguide.bring.no/fraktguide/api/pickuppoint/id/171108","unitType":"BRING","postalCode":"1451","city":"NESODDTANGEN","countryCode":"NO","country":"Norway","dateIso":"2013-06-19T08:35:21+02:00","displayDate":"19.06.2013","displayTime":"08:35","consignmentEvent":false},{"description":"Sendingen er ankommet terminal og blir videresendt","status":"IN_TRANSIT","recipientSignature":{"name":""},"unitId":"032850","unitType":"BRING","postalCode":"0024","city":"OSLO","countryCode":"NO","country":"Norway","dateIso":"2013-06-18T16:37:13+02:00","displayDate":"18.06.2013","displayTime":"16:37","consignmentEvent":false,"definitions":[{"term":"terminal","explanation":"Brev, pakke eller godsterminal som benyttes til sortering  og omlasting av sendinger som er underveis til mottaker."}]},{"description":"Sendingen er tollbehandlet og sendes til mottaker.","status":"IN_TRANSIT","recipientSignature":{"name":""},"unitId":"032874","unitType":"BRING","postalCode":"0024","city":"OSLO","countryCode":"NO","country":"Norway","dateIso":"2013-06-18T13:44:56+02:00","displayDate":"18.06.2013","displayTime":"13:44","consignmentEvent":false,"definitions":[{"term":"mottaker","explanation":"En person eller firma som får en sending tilsendt er mottaker. Kalles også adressat. Det vil si den som avsender adresserer sendingen til."}]},{"description":"Sendingen er antatt tollpliktig og er sendt til tollbehandling","status":"CUSTOMS","recipientSignature":{"name":""},"unitId":"100838","unitType":"BRING","postalCode":"1470","city":"LØRENSKOG","countryCode":"NO","country":"Norway","dateIso":"2013-06-17T12:34:28+02:00","displayDate":"17.06.2013","displayTime":"12:34","consignmentEvent":false,"definitions":[{"term":"tollbehandling","explanation":"Bestiller du varer fra utlandet, for eksempel på utenlandske nettsteder, må du fortolle varene. Vi utfører denne tjenesten for deg. \r\nSkal du sende varer utenfor Norges grenser, må sendingene først tollbehandles. Avhengig av vareverdi og innhold kan det kreves at sendingen eksportdeklareres (fortolles)."},{"term":"antatt tollpliktig","explanation":"En sending som antas å ha tollpliktig innhold. Sendingen går videre til tollkontroll. Det betyr ikke nødvendigvis at mottaker må betale toll eller moms, men sendingen blir kontrollert for å avgjøre dette. "}]},{"description":"Sendingen er ankommet mottakerlandet","status":"INTERNATIONAL","recipientSignature":{"name":""},"unitId":"100838","unitType":"BRING","postalCode":"","city":"OSLO LETTER CENTER","countryCode":"NO","country":"Norway","dateIso":"2013-06-17T11:41:48+02:00","displayDate":"17.06.2013","displayTime":"11:41","consignmentEvent":false},{"description":"Sendingen er sendt fra avsenderland","status":"INTERNATIONAL","recipientSignature":{"name":""},"unitId":"032858","unitType":"BRING","postalCode":"","city":"SINGAPORE SØ5","countryCode":"SG","country":"Singapore","dateIso":"2013-06-14T11:22:00+02:00","displayDate":"14.06.2013","displayTime":"11:22","consignmentEvent":false,"definitions":[{"term":"avsenderland","explanation":"Det landet en sendingen er innlevert og sendt ifra."}]},{"description":"Sendingen er ankommet eksportterminal","status":"INTERNATIONAL","recipientSignature":{"name":""},"unitId":"032858","unitType":"BRING","postalCode":"","city":"SINGAPORE SØ5","countryCode":"SG","country":"Singapore","dateIso":"2013-06-13T21:06:00+02:00","displayDate":"13.06.2013","displayTime":"21:06","consignmentEvent":false},{"description":"Sendingen er sendt fra avsenderland","status":"INTERNATIONAL","recipientSignature":{"name":""},"unitId":"032858","unitType":"BRING","postalCode":"","city":"SINGAPORE SØ5","countryCode":"SG","country":"Singapore","dateIso":"2013-06-13T21:06:00+02:00","displayDate":"13.06.2013","displayTime":"21:06","consignmentEvent":false,"definitions":[{"term":"avsenderland","explanation":"Det landet en sendingen er innlevert  og sendt ifra."}]}]}]}]}

我做错了什么？

Answer 1

我也遇到了类似的问题。记录并检查从 JSON 中获得的内容。如果您的 JSON 无效，则仅修复您的文件将不起作用，但如果您的 json 有效，请尝试像这样更改您的行:(increment and trytil substring(5))

final JSONObject object = new JSONObject(sText.substring(1));