通过url读取页面内容

public String doSingleLink(String url, String loginsuccess, String jsTxt,String email,String pwd)
throws IOException {
// 读取登录页面内容
URL serviceIpUrl = new URL(url);
URLConnection connection = serviceIpUrl.openConnection();
connection.setRequestProperty("method", "post");
connection.connect();
InputStreamReader isr = null;
BufferedReader br = null;
String loginTxt = "";
InputStream is = connection.getInputStream();
is = connection.getInputStream();
isr = new InputStreamReader(is,"utf-8");
br = new BufferedReader(isr);
String str = "";
try {
while ((str = br.readLine()) != null) {
loginTxt += str + "\r\n";
}
} catch (IOException e) {
e.printStackTrace();
}
br.close();
is.close();
return loginTxt;
}