json数据解析

package cn.zengfansheng.jsondemo.utils;
 
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
 
import android.annotation.SuppressLint;
import android.util.JsonReader;
import cn.zengfansheng.jsondemo.domain.Product;
 
/**
* json数据解析
* @author hacket
*
*/
@SuppressLint("NewApi")
public class ParseJson {
 
    /**
     * json数据解析
     * @param in
     * @return
     * @throws IOException
     */
    public static List<Product> readJsonStream(InputStream in) throws IOException {
 
        JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
        try {
            return readProductsArray(reader);
        } finally {
          reader.close();
        }
 
      }
 
    /**
     * 将一个json文件中多个json对象封装成一个List集合
     * @param reader
     * @return
     * @throws IOException
     */
    private static List<Product> readProductsArray(JsonReader reader) throws IOException {
 
        List<Product> products = new ArrayList<Product>();
 
        reader.beginArray();
        while (reader.hasNext()) {
            products.add(readProduct(reader));
        }
        reader.endArray();
        return products;
      }
 
    /**
     * 将一个json数据对象封装成一个bean对象
     * @param reader
     * @return
     * @throws IOException
     */
    private static Product readProduct(JsonReader reader) throws IOException {
        Integer id = -1;
        Integer marketPrice = -1;
        String name = "";
        Integer activitiesPrice = -1;
        String pictureUrl = "";
 
        reader.beginObject();
        while (reader.hasNext()) {
          String jsonName = reader.nextName();
          if (jsonName.equals("id")) {
              id = reader.nextInt();
          } else if (jsonName.equals("market_price")) {
              marketPrice = reader.nextInt();
          } else if (jsonName.equals("activities_price")) {
              activitiesPrice = reader.nextInt();
          } else if (jsonName.equals("name")) {
              name = reader.nextString();
          } else {
            reader.skipValue();
          }
        }
        reader.endObject();
        return new Product(id, name, marketPrice, activitiesPrice, pictureUrl);
      }
}