zip与流+JAVA7+Files

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

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.URL;

import java.net.URLConnection;

import java.nio.file.FileSystem;

import java.nio.file.FileSystems;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.StandardOpenOption;

import java.util.ArrayList;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipInputStream;

public class Test

{

private static Path path;

private static String fileName;

private static File file;

public static void main(String args[])

{

try

{

downFile();

zipExtractor(path);

}

catch (Exception e)

{

e.printStackTrace();

}

}

private static void downFile() throws Exception

{

URL url = new URL(

"http://121.41.108.144:8080/download/130636083243513137/down07.zip");

fileName = url.getFile();

file = new File(fileName);// down07.zip

fileName = file.getName();

path = Paths.get("C:", fileName);// c:\\down07.zip

file = path.toFile();

URLConnection connection = null;

connection = url.openConnection();

int length = connection.getContentLength();

if (file.exists())

{

System.out.println("zzzz");

}

else

{

OutputStream out = new FileOutputStream(file);

copy(connection.getInputStream(), out, length);

out.close();

}

}

private static void copy(InputStream inputStream, OutputStream out,

int length)

{

byte[] buffer = new byte[length];

BufferedInputStream bi = new BufferedInputStream(inputStream);

BufferedOutputStream bo = new BufferedOutputStream(out);

int count = 0, n = 0;

try

{

while ((n = bi.read(buffer, 0, length)) != -1)

{

out.write(buffer, 0, n);

count += n;

}

out.flush();

}

catch (Exception e)

{

e.printStackTrace();

}

finally

{

try

{

out.close();

}

catch (IOException e)

{

e.printStackTrace();

}

try

{

bi.close();

}

catch (IOException e)

{

e.printStackTrace();

}

}

}

private static boolean zipExtractor(Path path) throws Exception

{

boolean isSuccess = false;

Path newPath = Paths.get("C:", "Users", "zzzzz", "Desktop", "new");

File f = newPath.toFile();

if (f.exists() == false)

{

f.mkdirs();

}

path = Paths.get("C:", "Users", "zzzzz", "Desktop", "down07.zip");

ZipFile zipFile = new ZipFile(path.toString());

ZipInputStream zipInputStream = new ZipInputStream(

Files.newInputStream(path, StandardOpenOption.READ));

ZipEntry entry;

FileSystem fs = FileSystems.newFileSystem(path, null);

Enumeration enumeration = zipFile.entries();

while(enumeration.hasMoreElements())

{

entry =(ZipEntry)enumeration.nextElement();

String sourName = entry.getName();

if(newPath.resolve(sourName).toFile().exists() == false)

{

Files.copy(fs.getPath(sourName), newPath.resolve(sourName));

}

else

{

System.out.println("exist");

}

}

// while ((entry = zipInputStream.getNextEntry()) != null)

// {

// String sourceName = entry.getName();

// if (newPath.resolve(entry.getName()).toFile().exists() == false)

// {

// Files.copy(fs.getPath(sourceName),

// newPath.resolve(entry.getName()));

// }

// else

// {

// System.out.println("exist");

// }

// }

return isSuccess;

}

}

代码比较乱