Json解析全国市县区按汉字首字母排序

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class Test_1 {
	private static String result_info = "";
	static List<String>   list_district = new ArrayList<String>();
	public static void main(String[] args) {

		URL url;
		try {

			url = new URL(
					"http://v.juhe.cn/postcode/pcd?dtype=json&key=9da.......");/////需要自己申请 聚合数据