java 发送内容格式为xml 的http请求

public class XmlParseTest {
    public static void main(String[] args) {
        XmlParse();
    }

    private static void XmlParse() {
        try {
            String urlStr = "https://api.newgistics.com/WebAPI/Shipment/Tracking";  //物流网站示例
            URL url = new URL(urlStr);
            URLConnection con = url.openConnection();
            con.setDoOutput(true);
            con.setRequestProperty("x-API-Key", "7314BB96-8107-4B87-A68A-EC346832511E");
            con.setRequestProperty("User-Agent", "Fiddler");
            con.setRequestProperty("Content-Type", "text/xml");

            OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream());
            String xmlInfo = getXmlInfo();
            System.out.println("urlStr=" + urlStr);
            // System.out.println("xmlInfo=" + xmlInfo);
            out.write(new String(xmlInfo.getBytes("UTF-8")));
            out.flush();
            out.close();
            BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String content = "";
            String track = "";
            while ((content = br.readLine()) != null) {
                track += content;
            }
            System.out.println(track);            
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private static String getXmlInfo() {
        StringBuilder sb = new StringBuilder();
        sb.append(
                "<TrackingRequestData xmlns=\"http://schemas.datacontract.org/2004/07/Newgistics.WebServices.ShipmentAPI\">");
        sb.append("<merchantID>2566</merchantID>");
        sb.append("<qualifier>Barcode</qualifier>");
        sb.append("<searchStrings>");
        sb.append(
                "<string xmlns=\"http://schemas.microsoft.com/2003/10/Serialization/Arrays\">92612927005075000000497421</string>");
        sb.append(
                "<string xmlns=\"http://schemas.microsoft.com/2003/10/Serialization/Arrays\">String content</string>");
        sb.append("</searchStrings>");
        sb.append("</TrackingRequestData>");
        return sb.toString();
    }
}