昨天突然想搞下抓取網上的圖片所以寫了下

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.SocketException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Image {
	
	public static void main(String args[]) throws SocketException {
		String str = GetUrl("http://image.baidu.com/search/index?tn=baiduimage&ps=1&ct=201326592&lm=-1&cl=2&nc=1&ie=utf-8&word=%E9%AB%98%E5%9C%86%E5%9C%86");
		List<String> ouput = GetMatcher(str, "src=\"([\\w\\s./:]+?)\"");

		for (String temp : ouput) {
			System.out.println(temp);
		}
		System.out.println("....................");
		for (int i = 0; i < ouput.size(); i++) {
			String aurl = ouput.get(i);
			URL url;
			try {
				url = new URL(aurl);
				// 開啟URL連線
				URLConnection con = (URLConnection) url.openConnection();
				// 得到URL的輸入流
				InputStream input = con.getInputStream();
				if (input.available() > 0) {
					// 設定資料緩衝
					byte[] bs = new byte[1024 * 2];
					// 讀取到的資料長度
					int len;
					// 輸出的檔案流儲存圖片至本
					String[] a = aurl.split("\\/");
					String name = a[a.length - 1];
					if (name.contains(".png") || name.contains(".jpeg") || name.contains(".jpg")|| name.contains(".gif")|| name.contains(".bmp")) {
					String dir = "E:\\Image\\gaoyuanyuan";
					File file = new File(dir, name);
					OutputStream os = new FileOutputStream(file);
					while ((len = input.read(bs)) != -1) {
						os.write(bs, 0, len);
					}
					os.close();
					input.close();}
				} else if (input.available() == 0) {
					System.out.println("與伺服器的連結已中斷");
					break;
				}
			} catch (MalformedURLException e) {
				
				e.printStackTrace();
			} catch (IOException e) {
				
				e.printStackTrace();
			}
			System.out.println("————————————————————————單張抓取完畢——————————————————————————");

		}
		System.out.println("————————————————————————全部抓取完畢——————————————————————————");
		
	}
	public static String GetUrl(String inUrl) {
		StringBuilder sb = new StringBuilder();
		try {
			URL url = new URL(inUrl);
			BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));

			String temp = "";
			while ((temp = reader.readLine()) != null) {
				// System.out.println(temp);
				sb.append(temp);
			}
		} catch (MalformedURLException e) {
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		} catch (IOException e) {
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		}
		return sb.toString();
	}

	public static List<String> GetMatcher(String str, String url) {
		List<String> result = new ArrayList<String>();
		Pattern p = Pattern.compile(url);// 獲取網頁地址
		Matcher m = p.matcher(str);
		while (m.find()) {
			// System.out.println(m.group(1));
			result.add(m.group(1));
		}
		return result;
	}

}