（转）向Internet发送xml数据

 利用HttpURLConnection对象,我们可以向网络发送xml数据.
StringBuilder xml =  new StringBuilder();
xml.append("<?xml version=/"1.0/" encoding=/"utf-8/" ?>");
xml.append("<M1 V=10000>");
xml.append("<U I=1 D=/"N73/">中国</U>");
xml.append("</M1>");
byte[] xmlbyte = xml.toString().getBytes("UTF-8");
URL url = new URL("http://localhost:8080/itcast/contanctmanage.do?method=readxml");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(6* 1000);
conn.setDoOutput(true);//允许输出
conn.setUseCaches(false);//不使用Cache
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");//维持长连接
conn.setRequestProperty("Charset", "UTF-8");
conn.setRequestProperty("Content-Length", String.valueOf(xmlbyte.length));
conn.setRequestProperty("Content-Type", "text/xml; charset=UTF-8");
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(xmlbyte);//发送xml数据
outStream.flush();
if (conn.getResponseCode() != 200) throw new RuntimeException("请求url失败");
InputStream is = conn.getInputStream();//获取返回数据
String result = readAsString(is, "UTF-8");
outStream.close();

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