Android 解析json_dome-IT计算机-毕业设计.zip

package com.szy.activity; import java.io.ByteArrayOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.json.JSONArray; import org.json.JSONObject; import android.util.Log; public class JSONutil { /** * 获取"数组形式"的JSON数据， * 数据形式：[{"id":1,"name":"张三","age":22},{"id":2,"name":"李四","age":23}] * @param path * 网页路径 * @return 返回List * @throws Exception */ public static List<Map<String, String>> getJSONArray(String path) throws Exception { String json = null; List<Map<String, String>> list = new ArrayList<Map<String, String>>(); Map<String, String> map = null; URL url = new URL(path); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.setConnectTimeout(5 * 1000);// 单位是毫秒，设置超时时间为5秒 // HttpURLConnection是通过HTTP协议请求path路径的，所以需要设置请求方式,可以不设置，因为默认为GET con.setRequestMethod("GET"); // 判断请求码是否是200码，否则失败 if (con.getResponseCode() == 200) { InputStream input = con.getInputStream();// 获取输入流 byte[] data = readStream(input);// 把输入流转换为字符数组 json = new String(data); // 把字符数组转换成字符串 // 数据直接为一个数组形式，所以可以直接 用android提供的框架JSONArray读取JSON数据，转换成Array JSONArray jsonArray = new JSONArray(json); for (int i = 0; i < jsonArray.length(); i++) { // 每条记录又由几个Object对象组成 JSONObject item = jsonArray.getJSONObject(i); int id = item.getInt("id"); // 获取对象对应的值 String name = item.getString("name"); int age = item.getInt("age"); map = new HashMap<String, String>(); map.put("id", id + ""); map.put("name", name); map.put("age", age + ""); list.add(map); } } return list; } /** * 获取"对象形式"的JSON数据， * 数据形式：{"total":2,"success":true,"arrayData":[{"id":1,"name" * :"张三","age":23},{"id":2,"name":"李四","age":25}]} * * @param path * 网页路径 * @return 返回List * @throws Exception */ public static List<Map<String, String>> getJSONObject(String path) throws Exception { List<Map<String, String>> list = new ArrayList<Map<String, String>>(); Map<String, String> map = null; URL url = new URL(path); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.setConnectTimeout(5 * 1000);// 单位是毫秒，设置超时时间为5秒 // HttpURLConnection是通过HTTP协议请求path路径的，所以需要设置请求方式,可以不设置，因为默认为GET con.setRequestMethod("GET"); if (con.getResponseCode() == 200) { InputStream input = con.getInputStream(); byte[] bb = readStream(input); String json = new String(bb); //System.out.println(json); JSONObject jsonObject = new JSONObject(json); // 里面有一个数组数据，可以用getJSONArray获取数组 JSONArray jsonArray = jsonObject.getJSONArray("arrayData"); for (int i = 0; i < jsonArray.length(); i++) { JSONObject item = jsonArray.getJSONObject(i); // 得到每个对象 int id = item.getInt("id"); // 获取对象对应的值 String name = item.getString("name"); int age = item.getInt("age"); map = new HashMap<String, String>(); // 存放到Map里面 map.put("id", id + ""); map.put("name", name); map.put("age", age + ""); list.add(map); } } return list; } /** * 获取类型复杂的JSON数据 数据形式 * {"name":"张三","age":23,"content":{"questionsTotal":2,"questions": * [{"question": "what's your name?", "answer": "张三"},{"question": * "what's your age?", "answer": "23"}]}} * @param path 网页路径 * @return 返回List * @throws Exception */ public static List<Map<String, String>> getJSON(String path) throws Exception { List<Map<String, String>> list = new ArrayList<Map<String, String>>(); Map<String, String> map = null; URL url = new URL(path); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.setConnectTimeout(5 * 1000);// 单位是毫秒，设置超时时间为5秒 // HttpURLConnection是通过HTTP协议请求path路径的，所以需要设置请求方式,可以不设置，因为默认为GET con.setRequestMethod("GET"); if (con.getResponseCode() == 200) { InputStream input = con.getInputStream(); byte[] bb = readStream(input); String json = new String(bb); JSONObject jsonObject = new JSONObject(json); String name = jsonObject.getString("name"); int age = jsonObject.getInt("age"); Log.i("abc", "name:" + name + " | age:" + age); // 测试数据 // 获取对象中的对象 JSONObject contentObject = jsonObject.getJSONObject("content"); // 获取对象中的一个值 //String questionsTotal = contentObject.getString("questionsTotal"); // 获取对象中的数组 JSONArray contentArray = contentObject.getJSONArray("questions"); for (int i = 0; i < contentArray.length(); i++) { JSONObject item = contentArray.getJSONObject(i); // 得到每个对象 String question = item.getString("question"); // 获取对象对应的问题 String answer = item.getString("answer"); //获取对象对应的回答 map = new HashMap<String, String>(); // 存放到Map里面 map.put("question", question); map.put("answer", answer); list.add(map); } } return list; } /** * 把输入流转换成字符数组 * * @param inputStream * 输入流 * @return 字符数组 * @throws Exception */ public static byte[] readStream(InputStream input) throws Exception { ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while ((len = input.read(buffer)) != -1) { bos.write(buffer, 0, len); } bos.close(); input.close(); return bos.toByteArray(); } }