**https://wpsvc5.com/ESAWebAPI/DwgData/018/1821%20Cedar%20Pkwy/Floor%201_BGD.json
这是我的json文件,我想得到索引(2)的数组值。我将json字符串作为字符串中的完整json文件数据,但是当我转换为json对象时,它只显示第一个索引数据。我需要所有数据作为对象。我是json解析的新手。 **
package com.example.swetha.myapplication;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
/**
* Created by swetha on 12/13/2016.
*/
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) throws JSONException {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
//HttpPost httpPost = new HttpPost(url);
HttpGet httpPost = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line+"\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
/* try {
//jObj= new JSONObject(json.substring(json.indexOf("{"), json.lastIndexOf("]")+1));//IndexOf("}") +1));
//jObj = new JSONArray(json).getJSONObject(1);
// json = json.replace("\\\"","'");
// jObj = new JSONObject(json.substring(1,json.length()));
} catch (JSONException e) {
e.printStackTrace();
}*/
// return new JSONObject(json.substring(json.indexOf("{"), json.lastIndexOf("}") + 1));
return jObj;
}
}
答案 0 :(得分:1)
以下是一个示例如何使用它
String json = "Assuming that here is your JSON response";
try {
JSONObject parentObject = new JSONObject(json);
JSONObject userDetails = parentObject.getJSONObject("user_details");
//And then read attributes like
String name = userDetails.getString("user_name");
String phone = userDetails.getString("user_phone");
String id = userDetails.getString("ref_id");
} catch (JSONException e) {
e.printStackTrace();
}
以上代码适用于
{ “user_details”:`{ “USER_ID”: “1”, “USER_NAME”: “昌德”, “USER_PHONE”: “9620085675”, “再F_ID”:6386}}
答案 1 :(得分:0)
Shweta,
您正在获取JSONArray响应并且您正在尝试JsonArray到JsonObject这是错误的。
JSONArray jsonArray=new JSONArray(json);
其次,你已经回答了你的问题,比如用这样的json格式附加,这不是一个合适但有效的方法。
json = "{\"Data\":" + json + "}";
jObj = new JSONObject(json);
确保您正在使用JSONArray并解析数据。还有一个建议,从该URL获取的数据非常庞大,并且由于数据量较大可能会停止您的应用程序,通过每个请求只获取10个jsonObjects来使用分页提高应用程序的性能。
答案 2 :(得分:-2)
json =" {\"数据\":" + json +"}";
jObj = new JSONObject(json);
我刚刚将这样的json字符串连接起来,它对我有用。