Java 自动登录程序片段

package auto;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;

public class AutoPost {

	public static void autoPost(String surl) throws IOException {
		URL url = new URL(surl);
		URLConnection conn = url.openConnection();
		conn.setDoOutput(true);
		OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream(),
				"UTF-8");
		out.write("username=oscar999&password=");
		out.flush();
		out.close();

		StringBuffer sTotalStrbuf = new StringBuffer();
		String sLine = "";
		InputStream instream = conn.getInputStream();
		BufferedReader reader = new BufferedReader(new InputStreamReader(
				instream));
		while ((sLine = reader.readLine()) != null) {
			sTotalStrbuf.append(sLine);
		}
		System.out.println(sTotalStrbuf.toString());

	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String surl = "http://www.open-open.com/doc/members/login";
		try {
			autoPost(surl);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

改进一版

package auto;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class AutoPost {

	public static void autoPost(String surl, HashMap paraMhm)
			throws IOException {
		URL url = new URL(surl);
		URLConnection conn = url.openConnection();

		// set User-Agent, avoid occur 403 error
		conn.setRequestProperty("User-Agent",
				"Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
		conn.setDoOutput(true);
		// OutputStreamWriter out = new
		// OutputStreamWriter(conn.getOutputStream(),
		// "UTF-8");
		OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream(),
				"GB2312");
		StringBuffer sParameterStr = new StringBuffer("?");
		if (paraMhm != null && paraMhm.size() > 0) {
			Iterator it = paraMhm.entrySet().iterator();
			while (it.hasNext()) {
				Map.Entry entry = (Map.Entry) it.next();
				String sKey = (String) entry.getKey();
				String sValue = (String) entry.getValue();
				sParameterStr.append(sKey);
				sParameterStr.append("=");
				sParameterStr.append(sValue);
				sParameterStr.append("&");
			}
			// delete the last &
			sParameterStr.deleteCharAt(sParameterStr.length() - 1);
		}
		out.write(sParameterStr.toString());

		out.flush();
		out.close();

		StringBuffer sTotalStrbuf = new StringBuffer();
		String sLine = "";
		InputStream instream = conn.getInputStream();
		BufferedReader reader = new BufferedReader(new InputStreamReader(
				instream));
		while ((sLine = reader.readLine()) != null) {
			sTotalStrbuf.append(sLine);
		}
		System.out.println(sTotalStrbuf.toString());

	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// String surl = "http://www.open-open.com/doc/members/login";
		HashMap<String, String> paraHashMap = new HashMap<String, String>();
		// String surl = "http://passport.csdn.net/account/login";
		// paraHashMap.put("u", "oscar999");
		// paraHashMap.put("p", "");

		// String surl = "http://www.open-open.com/home/index.php";
		// paraHashMap.put("username", "oscar999");
		// paraHashMap.put("password", "");

		String surl = "http://www.e-works.com.cn/comm/ewk_business/usercenter/userlogin_comm.aspx";
		paraHashMap.put("tboxUserName", "oscar999");
		paraHashMap.put("tboxPwd", "");

		try {
			autoPost(surl, paraHashMap);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

有时间再用awt 写个界面出来