Java复制本土和远程资源
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);
}
}
}