java模擬登錄人人，經過驗證碼

        以前想要爬取人人上的一些信息，由於須要登錄，因此就從網上直接拷貝了一份代碼來實現人人登錄，但發現搜素到的大部分都沒有實現驗證碼驗證。故本身添加了驗證碼驗證，固然本身偷懶，沒有解析圖片，而是直接把圖片保存到本地，還須要手動輸入驗證碼。固然登錄成功以後，就能夠爬取大量的其餘人的信息，這裏只返回的本身的頁面的源碼。

public class RenrenLogin {
    public static String userName = "xxxx@126.com";
    public static String  password = "xxxxx";
    public static String redirectURL = "http://www.renren.com/home";
    public static String renRenLoginURL = "http://www.renren.com/PLogin.do";
    private HttpResponse response;
    private HttpResponse resPic;
    public static String picUrl = "http://icode.renren.com/getcode.do?t=web_login&rnd=Math.random()";
    private HttpClient httpClient = new DefaultHttpClient();
    public static void main(String []args) throws IOException{
        RenrenLogin rl = new RenrenLogin();
        rl.printText();
    }
    private void getPic(){
        try {
            HttpGet httpget=new HttpGet(picUrl);
            resPic = httpClient.execute(httpget);
            HttpEntity entity = resPic.getEntity();
            InputStream is = entity.getContent();
            FileOutputStream out = new FileOutputStream (new File("F:\\new.png"));
            int read = 0;
            byte[]bytes=new byte[1024];
            while((read=is.read(bytes))!=-1)
                    out.write(bytes,0,read);
                    is.close();
                    out.flush();
                    out.close();
            } catch (IllegalStateException e1) {
                    e1.printStackTrace();
           } catch (IOException e1) {
                e1.printStackTrace();
    }
}
    public  boolean login() throws IOException{
        HttpPost httpPost = new HttpPost(renRenLoginURL);
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("origURL", redirectURL)); 
       nvps.add(new BasicNameValuePair("domain", "renren.com")); 
       nvps.add(new BasicNameValuePair("isplogin", "false")); 
       nvps.add(new BasicNameValuePair("formName", "")); 
       nvps.add(new BasicNameValuePair("method", "post")); 
       nvps.add(new BasicNameValuePair("submit", "登陸人人網")); 
       nvps.add(new BasicNameValuePair("email", userName)); 
       nvps.add(new BasicNameValuePair("password", password));
       nvps.add(new BasicNameValuePair("autoLogin", "true"));
       BufferedReader strin=new BufferedReader(new InputStreamReader(System.in));
       getPic();//下載圖片並保存到本地，本身需打開圖片查看
       System.out.println("請到F盤查看圖片驗證碼並在控制檯中輸入:");
       nvps.add(new BasicNameValuePair("icode", strin.readLine().toString()));
       nvps.add(new BasicNameValuePair("key_id", "1"));
       nvps.add(new BasicNameValuePair("captcha_type", "web_login"));
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(nvps,  HTTP.UTF_8));
            response = httpClient.execute(httpPost);
            System.out.println(response.getStatusLine());
            System.out.println(response.getParams());
           System.out.println(response.getFirstHeader("Location").getValue());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
       }  finally{
            httpPost.abort();
        }
            return true;
       }
    public String getText(String redirectLocation){
        HttpGet httpGet = new HttpGet(redirectLocation);
        ResponseHandler<String> responseHandler = new BasicResponseHandler(); 
        String responseBody = "";
        try {
            responseBody = httpClient.execute(httpGet, responseHandler);
        } catch (Exception e) {
            e.printStackTrace();
            responseBody = null; 
        } finally { 
            httpGet.abort(); 
            httpClient.getConnectionManager().shutdown(); 
        }   
        return responseBody;
    }
    private String getRedirectLocation() { 
        Header locationHeader = response.getFirstHeader("Location"); 
        if (locationHeader == null) { 
            return null; 
        } 
        return locationHeader.getValue(); 
    } 
    private void printText() throws IOException{
    if(login()){
    String redirectLocation = getRedirectLocation(); 
            if (redirectLocation != null) { 
                System.out.println(getText(redirectLocation)); 
            } 
    }
    }