package cn.mypic; 

 
    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 GetContentPicture { 
    //得到了圖片地址并下載圖片 
    public void getHtmlPicture(String httpUrl) { 
    URL url; 
    BufferedInputStream in; 
    FileOutputStream file; 
    int count;                      //圖片文件名序號  
    FileNumber num=new FileNumber();//圖片文件名序號類，num為對象 
    count=num.NumberReadFromFile();//獲取圖片文件序號 
    try { 
    System.out.println("獲取網絡圖片"); 
       String fileName = (String.valueOf(count)).concat(httpUrl.substring(httpUrl.lastIndexOf(".")));//圖片文件序號加上圖片的后綴名，后綴名用了String內的一個方法來獲得 
        //httpUrl.substring(httpUrl.lastIndexOf("/"));//這樣獲得的文件名即是圖片鏈接里圖片的名字 
       String filePath = "d:/image/";//圖片存儲的位置 
       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"); 
       count=count+1;//圖片文件序號加1 
       num.NumberWriteToFile(count);//將圖片名序號保存 
    } catch (MalformedURLException e) { 
       e.printStackTrace(); 
    } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
    } catch (IOException e) { 
       e.printStackTrace(); 
    } 
    } 

    //獲取網頁的代碼保存在String格式的Content中 
    public String getHtmlCode(String httpUrl) throws IOException { 
    String content =""; 
    URL uu = new URL(httpUrl); // 創建URL類對象 
    BufferedReader ii = new BufferedReader(new InputStreamReader(uu 
        .openStream())); // //使用openStream得到一輸入流并由此構造一個BufferedReader對象 
    String input; 
    while ((input = ii.readLine()) != null) { // 建立讀取循環，并判斷是否有讀取值 
       content += input; 
    } 
    ii.close(); 
    return content; 
    } 
    //分析網頁代碼，找到匹配的網頁圖片地址 
    public void get(String url) throws IOException { 

    String searchImgReg = "(?x)(src|SRC|background|BACKGROUND)=('|/")/?(([//w-]+/)*([//w-]+//.(jpg|JPG|png|PNG|gif|GIF)))('|/")";//用于在網頁代碼Content中查找匹配的圖片鏈接。 
    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);//this指對象gcp，在此地調用獲取網頁代碼，getHtmlCode方法 
    //System.out.println(content); //輸出的content將是一個連續的字符串。 

    Pattern pattern = Pattern.compile(searchImgReg);//java.util.regex.Pattern 
    Matcher matcher = pattern.matcher(content);     //java.util.regex.Matcher 
    while (matcher.find()) { 
       System.out.println(matcher.group(3));//輸出圖片鏈接地址到屏幕 
    // System.out.println(url); 
       this.getHtmlPicture(matcher.group(3));//對象調用getHtmlPicture從網上下載并輸出圖片文件到指定目錄 

    } 

    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)))('|/")"; 
    } 
    //主函數url網頁的地址 
    public static void main(String[] args) throws IOException { 

    String url = "http://www.baidu.com"; 
    GetContentPicture gcp = new GetContentPicture(); 
    gcp.get(url); 

 
    } 

} 

package cn.mypic; 

    import java.io.*; 

    public class FileNumber{ 
    //文件寫 
    public void NumberWriteToFile(int x){ 
       int c=0; 
       c=x; 
       File filePath=new File("d:/image");//文件名序號TXT文件保存地址 
       File f1=new File(filePath,"number.txt"); 
       try{ 
        FileOutputStream fout=new FileOutputStream(f1); 
        DataOutputStream out=new DataOutputStream(fout); 
        out.writeInt(c); 

       } 
       catch(FileNotFoundException e){ 
        System.err.println(e); 
       } 
       catch(IOException e){ 
        System.err.println(e); 
       } 

    } 
    //文件讀 
    public int NumberReadFromFile(){ 
       int c1 = 0; 
       File filePath=new File("d:/image"); 
       File f1=new File(filePath,"number.txt"); 
       try{ 
        FileInputStream fin=new FileInputStream(f1); 
        DataInputStream in=new DataInputStream(fin); 
        c1=in.readInt(); 
        System.out.println(c1);//輸出文件內容至屏幕 
       } 
       catch(FileNotFoundException e){ 
        System.err.println(e); 
       } 
       catch(IOException e){ 
        System.err.println(e); 
       } 
       return c1; 
    } 
    public static void main(String args[]){ 

    } 

}