ClientBCEServicer.java

package bce.client.servicers;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

import javax.net.ssl.HttpsURLConnection;

public class ClientBCEServicer {

    private ClientBCEServicer() {
    }

    /**
     * 客户端登录
     *
     * @param userName 用户名
     * @param password 密码
     * @return 两个登录信息，[0]：登录成功/失败反馈信息，[1]：JSESSIONID
     */
    public static String[] login(String userName, String password) {

        String[] loginInfo = new String[2];
        StringBuffer feedback = new StringBuffer();
        try {
            URL url = new URL("https://localhost:8443/bceserver/LoginServlet.sl");
            HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setRequestMethod("POST");
            conn.setUseCaches(false);
            conn.setInstanceFollowRedirects(false);
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            conn.connect();
            DataOutputStream out = new DataOutputStream(conn.getOutputStream());
            StringBuilder content = new StringBuilder();
            content.append(URLEncoder.encode("u", "UTF-8")).append("=")
                    .append(URLEncoder.encode(userName, "UTF-8")).append("&")
                    .append(URLEncoder.encode("p", "UTF-8")).append("=")
                    .append(URLEncoder.encode(password, "UTF-8")).append("&")
                    .append(URLEncoder.encode("flag", "UTF-8")).append("=")
                    .append(URLEncoder.encode("1", "UTF-8"));
            out.writeBytes(content.toString());
            out.flush();
            out.close();
            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
            String tempBuf;
            while ((tempBuf = reader.readLine()) != null) {
                feedback.append(tempBuf);
                continue;
            }
            reader.close();
            loginInfo[0] = feedback.toString();
            String key = "";
            String sessionId = "";
            if (conn != null && feedback.toString().startsWith("Welcome")) {
                for (int i = 1; (key = conn.getHeaderFieldKey(i)) != null; i++) {
                    if (key.equalsIgnoreCase("set-cookie")) {
                        sessionId = conn.getHeaderField(key);
                        sessionId = sessionId.substring(0, sessionId.indexOf(";"));
                        break;
                    }
                }
            }
            loginInfo[1] = sessionId;
            conn.disconnect();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return loginInfo;
    }
}