Http方式接口post调用工具 HttpUtil-蒲公英云

Http方式接口post调用工具 HttpUtil

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;
    }
}