java发送Http请求传送xml数据，并返回xml数据

客户端发送请求、以及处理服务端响应代码为：

//发送xml请求
        URL url = new URL("http://127.0.0.1:8080/Test/sendXmlAndReturnXml.do");
        String xml = "<aaa><ddd>cccccc客户端请求的xml数据cccccccc</ddd></aaa>";
        URLConnection conn = null;
        conn = url.openConnection();
        conn.setUseCaches(false);
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setRequestProperty("Content-Length", Integer.toString(xml.length()));
        conn.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
        OutputStream ops = conn.getOutputStream();
        OutputStreamWriter osw = new OutputStreamWriter(ops, "GBK");
        osw.write(xml);
        osw.flush();
        osw.close();

        //发送成功后，获取服务器的响应xml串：
        StringBuffer sb = new StringBuffer();
        String line = "";
        InputStream is = conn.getInputStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));//三层包装
        while ((line = br.readLine()) != null) {
            sb.append(line+ "\r\n");
        }
        System.out.println(sb.toString());

服务端代码为：

@Controller
public class TestXMLAction {
    @RequestMapping("/sendXmlAndReturnXml.do")
    public void sendXmlAndReturnXml(HttpServletRequest request, HttpServletResponse response) throws IOException{
        //获取请求的xml
        System.out.println("请求的xml数据为：\n" + getXmlFromRequest(request));
        //服务端响应xml数据
        response.getWriter().print("<aaa><ddd>bbbccc服务端返回响应xml数据，在客户端可以获取到</ddd></aaa>");
    }
    
    //从HTTP请求中取出请求的XML
    private String getXmlFromRequest(HttpServletRequest request)throws IOException {
        String reqXml = "";
        reqXml = request.getQueryString(); //GET请求
        if (StringUtils.isBlank(reqXml)) { //POST请求
            BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
            String line = null;
            StringBuilder sb = new StringBuilder();
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            br.close();
            reqXml = sb.toString();
        }
        return reqXml;
    }
}