java 解析 json

2019-11-08 01:15:58

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package com.cn.dzg.util;import java.io.ByteArrayOutputStream; import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import java.util.Map;import com.alibaba.fastjson.JSONException;import com.cn.dzg.pojo.Person;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class CheckGaoDe {public static String getJsonContent(String urlStr){ try{// 获取HttpURLConnection连接对象 URL url = new URL(urlStr); HttpURLConnection httpConn = (HttpURLConnection) url .openConnection(); // 设置连接属性 httpConn.setConnectTimeout(3000); httpConn.setDoInput(true); httpConn.setRequestMethod("GET"); // 获取相应码 int respCode = httpConn.getResponseCode(); if (respCode == 200){ return ConvertStream2Json(httpConn.getInputStream()); } } catch (MalformedURLException e) { e.PRintStackTrace(); } catch (IOException e) { e.printStackTrace(); } return ""; } public static String ConvertStream2Json(InputStream inputStream){ String jsonStr = ""; // ByteArrayOutputStream相当于内存输出流 ByteArrayOutputStream out = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; // 将输入流转移到内存输出流中 try { while ((len = inputStream.read(buffer, 0, buffer.length)) != -1) { out.write(buffer, 0, len); } // 将内存流转换为字符串 jsonStr = new String(out.toByteArray()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return jsonStr; }//2、获取javaBean public static Person getPerson(String jsonStr){Person person = new Person();try{// 将json字符串转换为json对象 JSONObject jsonObj = new JSONObject(); jsonObj.put("jsonStr", jsonStr); // 得到指定json key对象的value对象 JSONObject personObj = jsonObj.getJSONObject("results"); // 获取之对象的所有属性 person.setSname(personObj.getString("address"));}catch (net.sf.json.JSONException e){ // TODO Auto-generated catch block e.printStackTrace();}return person;} public static List<Person> getPersons(String jsonStr) { List<Person> list = new ArrayList<Person>(); JSONObject jsonObj; try {// 将json字符串转换为json对象 jsonObj = new JSONObject(); jsonObj.put("jsonStr", jsonStr); // 得到指定json key对象的value对象 JSONArray personList = jsonObj.getJSONArray("persons"); Iterator<Person> iterator = personList.iterator(); List<Person> persons = new ArrayList<Person>(); if (iterator.hasNext()) { Person p = iterator.next(); persons.add(p);} // 遍历jsonArray for (int i = 0; i < persons.size(); i++){ // 获取每一个json对象 JSONObject jsonItem = personList.getJSONObject(i); // 获取每一个json对象的值 Person person = new Person(); person.setSname(jsonItem.getString("address")); list.add(person); } } catch (JSONException e) { e.printStackTrace(); } return list; } public static String comp(String shopName){JSONObject jsonObject = JSONObject.fromObject(getJsonContent("http://restapi.amap.com/v3/place/text?&keyWords="+shopName+"&city=%E5%8C%97%E4%BA%AC&output=json&key=cc67375e756f812a64a3ffcb2719ea4e"));JSONArray jsonArray = jsonObject.getJSONArray("pois"); String address = "";if (jsonArray.size()==1) {address = jsonArray.getJSONObject(0).get("address").toString();}else{for (int i = 0; i < jsonArray.size(); i++) { if (shopName.equals(jsonArray.getJSONObject(i).get("name"))) { address = jsonArray.getJSONObject(i).get("address").toString();}else{address=jsonArray.getJSONObject(i).get("address").toString();}}} return address; }}

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