TwitterAPI.java

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import com.meterware.httpunit.*;

public class TwitterAPI {
	private WebConversation wc;

	public TwitterAPI() throws Exception {
		HttpUnitOptions.setScriptingEnabled(false);
		this.wc = new WebConversation();
	}

	private void login(String id, String password) throws Exception {
		WebResponse res = wc.getResponse("https://twitter.com/");

		WebForm form = res.getFormWithID("signin");
		form.setParameter("session[username_or_email]", id);
		form.setParameter("session[password]", password);
		form.setParameter("remember_me", "1");
		form.submit();
	}
	
	private String[] getMessages() throws Exception {
		WebResponse res = wc.getResponse("http://twitter.com/home");
		List<String> list = new ArrayList<String>();
		for(HTMLElement element : res.getElementsByTagName("span")){
			if (element.getClassName().equals("entry-content")) list.add(element.getText());
		}
		
		return list.toArray(new String[0]);
	}
	
	private void update(String msg) throws Exception {
		WebResponse res = wc.getResponse("http://twitter.com/home");

		WebForm form = res.getFormWithID("doingForm");
		form.setParameter("status", msg);
		form.submit();
	}

	private void set_icon() throws Exception {
		WebResponse res = wc.getResponse("http://twitter.com/account/picture");

		WebForm form = res.getForms()[0];
		form.setParameter("profile_image[uploaded_data]", new File("icon.png"));
		SubmitButton commit = form.getSubmitButton("commit");
		form.submit(commit);
	}	

	public static void main(String[] args) throws Exception {
		TwitterAPI api = new TwitterAPI();
		api.login("ID", "パスワード");
		System.out.println("logined");

		api.update("投稿テスト");
		
		for(String msg:api.getMessages()) System.out.println(msg);

	}
}