用java下载1个网页
参考了开源软件code。在自己机器上测试通过。import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.MalformedURLException;import java.net.URL;public class CopyHtm {public static void main(String[] args) throws Exception { String sourceUrlString = "sample/some.html"; String currentDir=System.getProperty("user.dir").replace('\\', '/'); download("file:///" +currentDir+"/"+sourceUrlString, "tmp");}final static int TRANSFER_SIZE = 4096;public static void download(String link, String dest) { File file; URL source; byte[] data; InputStream in; FileOutputStream out; int read; String fname = dest+"/"+genFileName(link); File ddest = new File(dest); if (!ddest.exists()) { ddest.mkdirs(); } file = new File(fname); if(file.exists()){ return; } try { source = new URL(link); data = new byte; try { in = source.openStream(); try { out = new FileOutputStream(file); try { while (-1 != (read = in.read(data, 0, data.length))) { out.write(data, 0, read); } }catch(Exception e){ System.err.println("broken link=" + link); }finally { out.close(); } } catch (FileNotFoundException fnfe) { fnfe.printStackTrace(); } finally { in.close(); } } catch (FileNotFoundException fnfe) { System.err.println("broken link " + fnfe.getMessage() + " ignored"); } } catch (MalformedURLException murle) { murle.printStackTrace(); } catch (IOException ioe) { ioe.printStackTrace(); }}public static String genFileNameExt(String url, String ext) { return genFileNameNoExt(url) + "." + ext;}public static String genFileNameNoExt(String url) { int ilast = url.lastIndexOf("/"); String fname = url.substring(ilast); int didx = fname.lastIndexOf('.'); if (didx > 0) { fname = fname.substring(0, didx);//+"."+ext; } return fname;}public static String genFileName(String url) { return genFileNameExt(url, "html");}}
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