HTTP-POST请求

public <a href="https://www.fons.com.cn/tag/class" target="_blank">class HttpUtil {

public static String doPost(String url, String param, int timeOut,String miyue)  throws IOException {
JSONObject oJson = JSONObject.parseObject(param);
param = oJson.toJSONString();
EncryptUtils eu = new EncryptUtils();
String sign = eu.md5Digest(param+timestamp+bssKey).toLowerCase();
url+="?timestamp="+timestamp+"&sign="+sign;
PrintWriter out = null;
OutputStreamWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
URLConnection conn = realUrl.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
conn.setConnectTimeout(timeOut);
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
out =new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
out.write(param);

/ out.print(param);

        out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(),"utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Throwable e) {
throw new IOException(e);
}
// 使用finally块来关闭输出流、输入流
finally {
if (out != null) {
try {
out.close();
} catch (Throwable ex) {
ex.printStackTrace();
}
}
if (in != null) {
try {
in.close();
} catch (Throwable ex) {
ex.printStackTrace();
}
}
}
return result;
}

}