Java复制本地和远程资源

java 文件复制 （^_^）

 

 

package org.fanzone.io.file;

 

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;

 

/**

* Title: JavaTech<br>

* Description: File Handler Sample<br>

* Copyright: Copyright (c) 2011 <br>

* Create DateTime: Jul 14, 2011 9:30:28 AM <br>

* @author wangmeng

*/

public class FileHandler {

 

private FileHandler(){}

 

/**

* Execute specified file.

* TMD,this can occur the error sometime like this: 

* @param file

*/

private static void open(String file){

try {

Runtime.getRuntime().exec("explorer " + file +"");

} catch (IOException e) {

e.printStackTrace();

}

}

/**

* Local copying.

* @param source

* @param destination

* @param open

*/

private static void localCopy(String source, String directory, boolean open){

FileOutputStream fos = null;

FileInputStream fis = null;

File src = null;

File dest = null;

String path = null;

byte[] b = null;

try {

src = new File(source);

fis = new FileInputStream(src);

b = new byte[Integer.parseInt(String.valueOf(src.length()))];

fis.read(b, 0, b.length);

fis.close();

path = directory + "\\" + source.substring(source.lastIndexOf('\\') + 1);

//System.out.println("local path: " + path);

dest = new File(path);

if(dest.exists()){

dest.deleteOnExit();

}

dest.createNewFile();

fos = new FileOutputStream(dest);

fos.write(b, 0, b.length);

fos.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (NumberFormatException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

if(null != fos){

fos.close();

}

if(null != fis){

fis.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}

if(open){

open(path);

}

}

/**

* Remote copying.

* @param source

* @param destination

* @param open

*/

private static void remoteCopy(String source, String directory, boolean open){

URL url = null;

URLConnection urlConn = null;

BufferedInputStream bis = null;

FileOutputStream fos = null;

File dest = null;

String path = null;

int contentLength = 0;

int read = 0;

int offset = 0;

try {

url = new URL(source);

urlConn = url.openConnection();

urlConn.setDoInput(true);

urlConn.connect();

contentLength = urlConn.getContentLength();

if(contentLength == -1){

throw new Exception("NND,jing ran not a er jing zhi File!");

}

bis = new BufferedInputStream(urlConn.getInputStream()); 

byte[] data = new byte[contentLength];

while(offset < contentLength){

read = bis.read(data, offset, data.length - offset);

if(read == -1)

break;

offset += read;

}

bis.close();

if(offset != contentLength){

System.out.println("There're " + (contentLength - offset) + "bytes left.");

System.exit(0);

}

path = directory + "\\" + source.substring(source.lastIndexOf('/') + 1);

//System.out.println("remote path: " + path);

dest = new File(path);

fos = new FileOutputStream(dest);

fos.write(data);

fos.flush();

fos.close();

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

if(open){

open(path);

}

}

 

/**

* Copy keynote.

* @param source

* @param destination

* @param open

*/

public static void copy(String source, String directory, boolean open){

if(source.startsWith("http://") || source.startsWith("https://")){

remoteCopy(source, directory, open);

}else{

localCopy(source, directory, open);

}

 

}

}

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package org.mars.io.file;

public class Commission {

public static void main(String[] args){

FileHandler.copy("http://baike.baidu.com/view/1193524.htm", System.getProperty("user.home"), true);

}

}