java以json格式向后台服务器接口发送请求的实例

import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import net.sf.json.JSONObject;public class InterfaceRequest {	//模拟向腾讯云发送接口	//接口	private final static String URL = "https://console.tim.qq.com/v4/im_open_login_svc/account_import?";					/**	 * @param args	 * @throws IOException 	 */	public static void main(String[] args) throws IOException {		// TODO Auto-generated method stub		//连接服务器		HttpURLConnection connection = connection(URL);			DataOutputStream out = new DataOutputStream(				connection.getOutputStream());				JSONObject obj = new JSONObject();		    obj.element("Identifier", "hehe");		System.out.println(obj.toString());			// 向腾讯请求传入编码为UTF-8格式的json数据		out.write(obj.toString().getBytes("UTF-8"));					out.flush();		out.close();		//获得服务器返回的结果		BufferedReader reader = new BufferedReader(new InputStreamReader(				connection.getInputStream()));		String lines;		StringBuffer sb = new StringBuffer("");		while ((lines = reader.readLine()) != null) {			lines = new String(lines.getBytes(), "utf-8");			sb.append(lines);		}			reader.close();									}		public static HttpURLConnection connection(String URL			) throws IOException {		URL url = new URL(URL);		HttpURLConnection connection = (HttpURLConnection) url.openConnection();		connection.setDoOutput(true);		connection.setDoInput(true);		connection.setRequestMethod("POST");		connection.setUseCaches(false);		connection.setInstanceFollowRedirects(true);		connection.setRequestProperty("Content-Type",				"application/x-www-form-urlencoded;charset=UTF-8");		connection.connect();		return connection;		// TODO Auto-generated method stub	}}