jsonobject

I'm currently learning some android programming with JAVA. My teacher shared this piece of code which will consume an API, get its JSON file, and convert it to a JSONArray file. Then he will Iterate through that JSONArray and put them into an ArrayList before displaying them onto an activity. The problem is that the API that I'm consuming returns a JSONObject file instead, and I do not know how to properly convert this to JSONArray. import android.util.Log; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedInputStream; import java.io

I have spent two days in this. I can work with other PC, but my Android Studio doesn´t import the library, I took two captures: As yo can see in the first picture, Android Studio autocompletes my line: However: I was reading about JSONObject in Android Developers ( here ) and Android include this in library. I also have tried to import other libraries from "org", but just works fine two of them: Them... I was thinking this might be a problem of Android Studio, and I reinstalled the IDE, the error persists. And I have tried to import the library in the gradle (this is in build.gradle module:

Fist: an explanation of difference between org.json.simple.JSONObject and org.json.JSONObject ?? Second: I have a code with org.json.JSONObject and org.json.JSONException. When I edit the code in eclipse ( JUNO) it resolves the type of JSONException and imports the package org.json.JSONException but when I run the project using maven in command line I have a problem ( JSONException cannot be resolved to a type). I tried to solve the issue by adding dependency to pom.xml like this : <dependency> <groupId>com.googlecode.json-simple</groupId> <artifactId>json-simple</artifactId> <version>1.1<

import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.filesystem.POIFSFileSystem; import org.apache.poi.ss.usermodel.BorderStyle; import org

I have a JSONObject with some attributes that I want to convert into a Map<String, Object> Is there something that I can use from the json.org or ObjectMapper ? use Jackson( http://jackson.codehaus.org/ ) from http://json.org/ HashMap<String,Object> result = new ObjectMapper().readValue(<JSON_OBJECT>, HashMap.class); You can use Gson() (com.google.gson) library if you find any difficulty using Jackson. HashMap<String, Object> yourHashMap = new Gson().fromJson(yourJsonObject.toString(), HashMap.class); This is what worked for me: public static Map<String, Object> toMap(JSONObject jsonobj)

本文参考 https://www.cnblogs.com/shirandedan/p/8423521.html ，另外参考的其他的不记得了，如果冒犯请联系我删除。 HttpClient 是Apache 下的项目，可以用来提供高效的支持 HTTP 协议的客户端编程工具包。如果只是需要向Web站点的某个简单页面提交请求并获取服务器响应，HttpURLConnection完全可以胜任。但在绝大部分情况下，Web站点的网页可能没这么简单，这些页面并不是通过一个简单的URL就可访问的，可能需要用户登录而且具有相应的权限才可访问该页面。在这种情况下，就需要涉及Session、Cookie的处理了，如果打算使用HttpURLConnection来处理这些细节，当然也是可能实现的，只是处理起来难度就大了。 　　为了更好地处理向Web站点请求，包括处理Session、Cookie等细节问题，Apache开源组织提供了一个HttpClient项目，看它的名称就知道，它是一个简单的HTTP客户端（并不是浏览器），可以用于发送HTTP请求，接收HTTP响应。但不会缓存服务器的响应，不能执行HTML页面中嵌入的Javascript代码；也不会对页面内容进行任何解析、处理。 　　简单来说，HttpClient就是一个增强版的HttpURLConnection

文件夹数据库处理逻辑 public class DbFolder { JSONObject root; public DbFolder() { this .root = new JSONObject(); this .root.put( "f_id" , "" ); this .root.put( "f_nameLoc" , " 根目录" ); this .root.put( "f_pid" , "" ); this .root.put( "f_pidRoot" , "" ); } /** * 将JSONArray转换成map * @param folders * @return */ public Map<String, JSONObject> toDic(JSONArray folders) { Map<String, JSONObject> dt = new HashMap<String, JSONObject>(); for ( int i = 0 , l = folders.size();i<l;++i) { JSONObject o = folders.getJSONObject(i); String id = o.getString( "f_id" ); dt.put(id, o); } return dt; } public Map<String,

原因：我在使用jdk1.7的时候要把ArrayList中的一些数据过滤一下写了如下代码： for (UserTrial userTrial : couponsByUserId) { for (BonusPoint allReductionCoupon : allReductionCoupons) { if (userTrial.getActivity().equals(allReductionCoupon.getActivity())){ allReductionCoupons.remove(allReductionCoupon ); } } 即我想把couponsByUserId中有的数据在allReductionCoupons删除：运行报错！ 原因：我在遍历allReductionCoupons时试图删除其中的一条数据，出现异常。 内部原因可见这个博客 作者： Matrix海子 出处： for (UserTrial userTrial : couponsByUserId) { JSONObject object = new JSONObject(); BonusPoint ishave = null; for (BonusPoint allReductionCoupon : allReductionCoupons) { if (userTrial.getActivity()