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 {      //得到了图片地址并下载图片      public void getHtmlPicture(String httpUrl) {      URL url;      BufferedInputStream in;      FileOutputStream file;      int count;                      //图片文件名序号       FileNumber num=new FileNumber();//图片文件名序号类，num为对象      count=num.NumberReadFromFile();//获取图片文件序号      try {      System.out.println("获取网络图片");         String fileName = (String.valueOf(count)).concat(httpUrl.substring(httpUrl.lastIndexOf(".")));//图片文件序号加上图片的后缀名，后缀名用了String内的一个方法来获得          //httpUrl.substring(httpUrl.lastIndexOf("/"));//这样获得的文件名即是图片链接里图片的名字         String filePath = "d:/image/";//图片存储的位置         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("图片获取成功");         count=count+1;//图片文件序号加1         num.NumberWriteToFile(count);//将图片名序号保存      } catch (MalformedURLException e) {         e.printStackTrace();      } catch (FileNotFoundException e) {         e.printStackTrace();      } catch (IOException e) {         e.printStackTrace();      }      }      //获取网页的代码保存在String格式的Content中      public String getHtmlCode(String httpUrl) throws IOException {      String content ="";      URL uu = new URL(httpUrl); // 创建URL类对象      BufferedReader ii = new BufferedReader(new InputStreamReader(uu          .openStream())); // //使用openStream得到一输入流并由此构造一个BufferedReader对象      String input;      while ((input = ii.readLine()) != null) { // 建立读取循环，并判断是否有读取值         content += input;      }      ii.close();      return content;      }      //分析网页代码，找到匹配的网页图片地址      public void get(String url) throws IOException {      String searchImgReg = "(?x)(src|SRC|background|BACKGROUND)=('|\")/?(([\\w-]+/)*([\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";//用于在网页代码Content中查找匹配的图片链接。      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指对象gcp，在此地调用获取网页代码，getHtmlCode方法      //System.out.println(content); //输出的content将是一个连续的字符串。      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));//输出图片链接地址到屏幕      // System.out.println(url);         this.getHtmlPicture(matcher.group(3));//对象调用getHtmlPicture从网上下载并输出图片文件到指定目录      }      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)))('|\")";      }      //主函数url网页的地址      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{      //文件写      public void NumberWriteToFile(int x){         int c=0;         c=x;         File filePath=new File("d:/image");//文件名序号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);         }      }      //文件读      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);//输出文件内容至屏幕         }         catch(FileNotFoundException e){          System.err.println(e);         }         catch(IOException e){          System.err.println(e);         }         return c1;      }      public static void main(String args[]){      }  }