安卓解析中JSON中getString 和optString的区别
\u5b89\u5353\u89e3\u6790\u4e2dJSON\u4e2dgetString \u548coptString\u7684\u533a\u522bandroid\u4e2djson\u89e3\u6790\u6709\u5f88\u591a\u79cd\u65b9\u5f0f,\u89e3\u6790\u5b8c,\u76f4\u63a5\u7ed9TextView\u8d4b\u503c\u5373\u53ef\u4ee5\u4e0b\u4e3aandroid\u4e2d\u5e38\u89c1\u7684JSON\u89e3\u6790\u7c7b\u5e931. android SDK\uff1aandroidSDK\u4e2d\u81ea\u5e26\u7684JSONObject2. gson google\u4e13\u95e8\u4e3aandrod\u5f00\u53d1\u7684json\u89e3\u6790\u6846\u67b63.jackson java EE Spring\u4e2d\u7684json\u8f6c\u6362\u5de5\u51774.json-lib\uff1a JSON-lib\u6846\u67b6\uff0c\u8f6c\u6362JSON\u3001XML\u5728Java EE\u4e2d\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u662fJackson Json\uff0c\u4f7f\u7528\u975e\u5e38\u65b9\u4fbf\u800c\u4e14\u6548\u7387\u6781\u9ad8\uff1b\u53e6\u5916\u8fd8\u6709\u4e24\u4e2a\u6bd4\u8f83\u6709\u540d\u6c14\u7684\u662fGson\u548cJSON-lib\uff0c\u67d0\u4e9b\u5927\u4fa0\u5df2\u7ecf\u5bf9\u5b83\u4eec\u505a\u4e86\u5bf9\u6bd4\u5b9e\u9a8c\uff0c\u7ed3\u8bba\u5982\u4e0b\u6267\u884c\u6548\u7387\uff1aJackson>Gson>JSON-lib
android\u4e2djson\u89e3\u6790\u6709\u5f88\u591a\u79cd\u65b9\u5f0f,\u89e3\u6790\u5b8c,\u76f4\u63a5\u7ed9TextView\u8d4b\u503c\u5373\u53ef
\u4ee5\u4e0b\u4e3aandroid\u4e2d\u5e38\u89c1\u7684JSON\u89e3\u6790\u7c7b\u5e93
1. android SDK\uff1aandroidSDK\u4e2d\u81ea\u5e26\u7684JSONObject
2. gson google\u4e13\u95e8\u4e3aandrod\u5f00\u53d1\u7684json\u89e3\u6790\u6846\u67b6
3.jackson java EE Spring\u4e2d\u7684json\u8f6c\u6362\u5de5\u5177
4.json-lib\uff1a JSON-lib\u6846\u67b6\uff0c\u8f6c\u6362JSON\u3001XML
\u5728Java EE\u4e2d\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u662fJackson Json\uff0c\u4f7f\u7528\u975e\u5e38\u65b9\u4fbf\u800c\u4e14\u6548\u7387\u6781\u9ad8\uff1b\u53e6\u5916\u8fd8\u6709\u4e24\u4e2a\u6bd4\u8f83\u6709\u540d\u6c14\u7684\u662fGson\u548cJSON-lib\uff0c\u67d0\u4e9b\u5927\u4fa0\u5df2\u7ecf\u5bf9\u5b83\u4eec\u505a\u4e86\u5bf9\u6bd4\u5b9e\u9a8c\uff0c\u7ed3\u8bba\u5982\u4e0b\u6267\u884c\u6548\u7387\uff1aJackson>Gson>JSON-lib
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绛旓細public class JsonTest { 鈥烩烩籶rivate static final Log log = LogFactory.getLog(JsonTest.class);private static Map<String, String> opMap = new HashMap<String, String>();static{ opMap.put("accbook", "=");opMap.put("vouchertype", "=");opMap.put("voucherno", "=");op...
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绛旓細娉ㄦ剰杩斿洖鐨鏁版嵁鏄json,涓嶆槸java,瑕佹寜鐓s鐨勪娇鐢ㄦ柟寮,杩涜澶勭悊,鍙互console.log(json),鏌ョ湅鎺у埗鍙拌緭鍑 json.a.b绫讳技杩欑璋冪敤鏂瑰紡,
绛旓細char *get[100];//xpath瑙ｆ瀽html int size = xpath(d, "//body/div[@class='wrap']/div[@class='sort-column area']/div[@class='column-bd cfix']/ul[@class='st-list cfix']/li/strong/a", get锛 100);int i;for (i = 0; i < size; i++) { //灏嗚幏鍙栧埌鐨鐢靛奖鍚嶇О锛...
绛旓細httpWebRequest.Method = "GET";httpWebRequest.Timeout = 20000;HttpWebResponse response = (HttpWebResponse)request.GetResponse();StreamReader sr = new StreamReader(response.GetResponseStream());string jsonstr = sr.ReadToEnd();濡傛灉鎸夌収鎮鐨浠ｇ爜杩欐牱鍘昏姹.浠栬嚜韬槸浼氳鏀瑰姩鎴愯繖涓牱瀛愮殑.....
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绛旓細鎴戜滑鎶婅繖鏉℃秷鎭緭鍏ユ祻瑙堝櫒鐨勫湴鍧鏍,灏卞彲浠ョ湅鍒拌繑鍥炵殑鏁版嵁濡備笅,閲岄潰鐨 TradeValue 灏辨槸鎴戜滑鎯宠鐨勬暟鎹簡: 浜屻佽皟鐢╮equests搴瑙ｆ瀽鏁版嵁 UN Comtrade鐨勬帴鍙ｄ互json鏍煎紡浜ゆ崲鏁版嵁,鎴戜滑鏉ョ湅涓鐪嬭繑鍥炵殑鏁版嵁鏍煎紡銆傛垜浠鐢ㄥ埌Python鐨剅equests搴撱 import requests test = requests.get("http://comtrade.un.org/api/get", par...
绛旓細st = con.createStatement();> <!DOCTYPE html> Creating Charts with Data from a Database - fusioncharts.com <!-- Step 1: Include the `fusioncharts.js` file. This file is needed to render the chart. Ensure that the path to this JS file is correct.Otherwise, it may lead...
