java以json格式向后台服务器接口发送请求的实例

代码如下：

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
}
}

来源：http://blog.csdn.net/u012744265/article/details/51923130