從網站中取所有圖片 java代碼

分類:編程 時間:2017-04-04
import Java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
     
public class GetHtml {
    
	public void getHtmlPicture(String httpUrl) {
	    URL url;
	    BufferedInputStream in;
	    FileOutputStream file;
	    try {
	       system.out.println("取網絡圖片");
	       String fileName = httpUrl.substring(httpUrl.lastIndexOf("/"));
	       String filePath = "D:\\pic\\";
	       url = new URL(httpUrl);
	      
	       in = new BufferedInputStream(url.openStream());
	      
	       file = new FileOutputStream(new File(filePath+fileName));
	       int t;
	       while ((t = in.read()) != -1) {
	       file.write(t);
	       }
	       file.close();
	       in.close();
	      System.out.println("圖片獲取成功");
	    } catch (MalformedURLException e) {
	       e.printStackTrace();
	    } catch (FileNotFoundException e) {
	      e.printStackTrace();
	    } catch (IOException e) {
	       e.printStackTrace();
	    }
    }
      
    public String getHtmlCode(String httpUrl) throws IOException {
	    StringBuffer content = new StringBuffer("");
	    URL uu = new URL(httpUrl); // 創建URL類對象
	    BufferedReader ii = new BufferedReader(new InputStreamReader(uu.openStream())); // //使用openStream得到一輸入流並由此構造一個BufferedReader對象
	    String input;
	    while ((input = ii.readLine()) != null) { // 建立讀取循環,並判斷是否有讀取值
	       content.append(input);
	    }
	    ii.close();
	    return content.toString();
    }
     
    public void get(String url) throws IOException {
	    String searchImgReg = "(?x)(src|SRC|background|BACKGROUND)=('|\")/?(([\\w-]+/)*([\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";
	    String searchImgReg2 = "(?x)(src|SRC|background|BACKGROUND)=('|\")(http://([\\w-]+\\.)+[\\w-]+(:[0-9]+)*(/[\\w-]+)*(/[\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";
	      
	    String content = this.getHtmlCode(url);
	    System.out.println(content);
	      
	    Pattern pattern = Pattern.compile(searchImgReg);
	    Matcher matcher = pattern.matcher(content);
	    while (matcher.find()) {
	       System.out.println(matcher.group(3));
	       this.getHtmlPicture(url+matcher.group(3));
	    }

	    pattern = Pattern.compile(searchImgReg2);
	    matcher = pattern.matcher(content);
	    while (matcher.find()) {
	       System.out.println(matcher.group(3));
	       this.getHtmlPicture(matcher.group(3));
	    }
	    // searchImgReg =
	    // "(?x)(src|SRC|background|BACKGROUND)=('|\")/?(([\\w-]+/)*([\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";
    }
    
    public static void main(String[] args) throws IOException {
	    String url = "http://weather.news.qq.com/qresult.htm?acity%E6%9D%AD%E5%B7%9E.htm&ADUIN=89576537&ADSESSION=1417053231&ADTAG=CLIENT.QQ.5371_weather.0&ADPUBNO=26417";
	    GetHtml gcp = new GetHtml();
	    gcp.get(url);
    }
}


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