java 模拟百度登陆,该怎么处理

private void login() {        String surl = "https://passport.baidu.com/?login&tpl=mn";        // String surl = "http://localhost:8080/jkl.html";        URL url = null;        try {            url = new URL(surl);        } catch (MalformedURLException e) {            e.printStackTrace();        }        HttpURLConnection connection = null;        try {            connection = (HttpURLConnection) url.openConnection();        } catch (IOException e) {            e.printStackTrace();        }        connection.setDoOutput(true);        try {            connection.setRequestProperty("Content-type", "text/html");            connection.setRequestMethod("POST");            connection.setRequestProperty("User-Agent",                    "Mozilla/5.0 (compatible; MSIE 6.0; Windows NT)");            connection.setRequestProperty("Content-Type",                    "application/x-www-form-urlencoded");        } catch (ProtocolException e1) {            e1.printStackTrace();        }        OutputStreamWriter out = null;        try {            out = new OutputStreamWriter(connection.getOutputStream(), "gb2312");        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        try {            String params = "tpl_ok=&" + "next_target=&" + "tpl=mn&"                    + "skip_ok=&" + "aid=&" + "need_pay=&" + "need_coin=&"                    + "pay_method=&" + "u=http://www.baidu.com/&"                    + "return_method=get&" + "more_param=&" + "return_type=&"                    + "psp_tt=0&" + "safeflg=0&"                    + "isphone=tpl&" + "username=xxx&"                    + "password=xxx&" + "verifycode=&" + "mem_pass=";            out.write(params);            out.flush();            out.close();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        cookies = connection.getHeaderField("Set-Cookie");    }

private void view(String surl) throws Exception {        URL url = new URL(surl);        HttpURLConnection conn = (HttpURLConnection) url.openConnection();        if (!"".equals(cookies)) {            conn.setRequestProperty("Cookie", cookies);        }        conn.connect();        InputStreamReader in = new InputStreamReader(conn.getInputStream(),                "gb2312");        int i = 0;        while ((i = in.read()) != -1) {            System.out.print((char) i);        }        System.out.println();    }