使用HttpURLConnection发送POST请求

通过URL访问其他电脑或者服务器上的方法：

URL url = new URL("http://20.10.3.23:6060/call/geometryGroupOperater.op?action=queryMapPointsGroups");
HttpURLConnection urlcon = (HttpURLConnection)url.openConnection();
urlcon.setRequestMethod("POST");
urlcon.setDoOutput(true);// 是否输入参数

StringBuffer params1 = new StringBuffer();
// 表单参数与get形式一样
params1
.append("xs=").append(xs).append("&")
.append("ys=").append(ys).append("&")
.append("groupIds=").append(groupIds);
System.out.println(params1.toString());
byte[] bypes = params1.toString().getBytes();
urlcon.getOutputStream().write(bypes);// 输入参数
urlcon.connect(); //获取连接
InputStream is = urlcon.getInputStream();

BufferedReader buffer = new BufferedReader(new InputStreamReader(is));
StringBuffer bs = new StringBuffer();
String l = null;
while((l=buffer.readLine())!=null){
bs.append(l);
}
System.out.println(bs.toString());