设置java.net.URL请求方式post get

URL url = new URL("网页");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);//允许连接提交信息
connection.setRequestMethod("POST");//网页提交方式“GET”、“POST”
connection.setRequestProperty("User-Agent", "Mozilla/4.7 [en] (Win98; I)");
StringBuffer sb = new StringBuffer();
sb.append("username=admin");
sb.append("&password=admin");
OutputStream os = connection.getOutputStream();
os.write(sb.toString().getBytes());
os.close();

BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

String responseCookie = connection.getHeaderField("Set-Cookie");//取到所用的Cookie
System.out.println("cookie:" + responseCookie);
String line = br.readLine();

while (line != null) {

System.out.println(new String(line.getBytes()));

line = br.readLine();//打出登录的网页

}
//acces
URL url1 = new URL("网页的登录后的页面");
HttpURLConnection connection1 = (HttpURLConnection) url1.openConnection();
connection1.setRequestProperty("Cookie", responseCookie);//给服务器送登录后的cookie
BufferedReader br1 = new BufferedReader(new InputStreamReader(connection1.getInputStream()));

String line1= br1.readLine();

while (line1 != null) {

System.out.println(new String(line1.getBytes()));

line1 = br1.readLine();

}