简单获取网页中特定图片

所列代码功能仅是爬取单个url网页内容中特定内容。

DefaultHttpClient httpClient = new DefaultHttpClient();
    private  HttpPost httppost;
    private  HttpResponse response;

    public Crawler(int tag) {
　　　　 /*此处设置代理服务器，主要用来避免频繁抓取某一网站，而导致网站封杀爬虫，可以不用
        HttpHost proxy = new HttpHost("121.182.114.192", 9022);  
        httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);  
        httpClient.getParams().setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);
        httpClient.getParams().setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 10000);
    }
    public void run() {
        try {
                String crawlUrl = "http://www.baidu.com";
                HttpPost httppost = new HttpPost(crawlUrl);
                response = httpClient.execute(httppost);
                String str = EntityUtils.toString(response.getEntity());
　　　　　　　　　　/*正则匹配，获取自己所需要的内容
                Pattern p = Pattern.compile("data-resized=\"([^\"]*)\"");
                Matcher m = p.matcher(str);while (m.find()) { 
                    downPicture(m.group(1), dir,hotelId+""+i+".jpg");
                }
                System.out.println(crawlUrl + "......SUCCESS");
                httppost.abort();
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("errorUrl ........................");
        }
        mysql.close();
    }
    
　　/*下载图片
    public boolean downPicture(String urlStr, String dir, String fileName) {        
        try {
                URL url = new URL(urlStr);
                Image src = javax.imageio.ImageIO.read(url);
                int wideth = src.getWidth(null); 
                int height = src.getHeight(null); 
                BufferedImage tag = new BufferedImage(wideth, height, BufferedImage.TYPE_INT_RGB);
                tag.getGraphics().drawImage(src, 0, 0, wideth, height, null); 
                String path = "pic\\" + dir;
                File f = new File(path);
                if (!f.exists()) f.mkdirs();
                    FileOutputStream out = new FileOutputStream(path+"\\"+fileName); 
                    JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
                    encoder.encode(tag); 
                    out.close();  
                } catch (IOException e) {
                    e.printStackTrace();
                return false;
            } 
        return true;
    }