使用Java原生API编写发送HTTP_POST请求的工具类

/** * 下面是测试代码 */public static void main(String[] args) throws UnsupportedEncodingException {Map<String, String> params = new HashMap<String, String>();params.put("merNo", "301100100001630");params.put("signType", "MD5");params.put("merBindAgrNo", "00003018007000006450000013866742");params.put("interfaceVersion", "1.0.0.0");params.put("amount", "1000");params.put("orderDate", "20120823");params.put("orderNo", "UDP1208230917531231111");params.put("merReqTime", "20120823091802");params.put("goodsDesc", URLEncoder.encode("为号码交费充值元","UTF-8"));params.put("goodsName", URLEncoder.encode("中国联通交费充值","UTF-8"));params.put("userIdeMark", "3");params.put("bankAgrMode", "9");params.put("signMsg", "3ced24a118461043901d47815e6905a8");System.out.println(sendPostRequest("http://123.125.97.239/tra/bind/payment.htm", params));}