如果编码格式不是utf-8可以换成别的，或者提出来一个参数也行
/**
*
* @param urlstr 请求的地址
* @param json json格式的参数
* @param headerMap 需要传入的header信息，如果没有可以为空
* @return
*/
public static String doPostJson(String urlstr, String json, Map<String, ?> headerMap) {
try {
URL url = new URL(urlstr);
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/json");
if(headerMap!=null){
Iterator<String> keys = headerMap.keySet().iterator();
while (keys.hasNext()) {
String key = keys.next();
Object val = headerMap.get(key);
List tmpList = new ArrayList();
tmpList.add(val.toString());
connection.addRequestProperty(key, val.toString());
}
}
connection.connect();
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
JSONObject obj = JSONObject.parseObject(json);
out.writeBytes(obj.toString());
out.flush();
out.close();
//读取响应
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();
connection.disconnect();
return sb.toString();
// 断开连接
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
