Http方式接口post调用工具 HttpUtil

刺骨的言语ヽ痛彻心扉 2022-04-12 02:28 886阅读 1赞

工作中有时候需要调用外部的接口，通过http方式调用，记录一下这个工具类。

public class HttpUtil {
        private static Logger log = LoggerFactory.getLogger(HttpUtil.class);
        private final static int CONNECT_TIMEOUT = 50000;
        private static final String CONTENT_TYPE = "application/xml";
        private static final String DEFAULT_ENCODING = "UTF-8";
    
        /**
         * post请求，参数格式设置为xml
         * @param urlStr
         * @param data
         * @return
         */
        public static String postData(String urlStr, String data, String contentType) {
            BufferedReader reader = null;
            try {
                URL url = new URL(urlStr);
                URLConnection conn = url.openConnection();
                conn.setDoOutput(true);
                conn.setConnectTimeout(CONNECT_TIMEOUT);
                conn.setReadTimeout(CONNECT_TIMEOUT);
                if (contentType != null) {
                    conn.setRequestProperty("content-type", contentType);
                }
                OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING);
                if (data == null) {
                    writer.write("");
                } else {
                    writer.write(data);
                }
                writer.flush();
                writer.close();
    
                reader = new BufferedReader(new InputStreamReader(conn.getInputStream(),DEFAULT_ENCODING));
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = reader.readLine()) != null) {
                    sb.append(line);
                    sb.append("\r\n");
                }
                return sb.toString();
            } catch (IOException e) {
                e.printStackTrace();
                log.error(e.getMessage());
            } finally {
                try {
                    if (reader != null) {
                        reader.close();
                    }
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
            return null;
        }
    }