java实现文件复制上传操作

public static boolean copyFile(String srcFileName, String destFileName,boolean overlay); public static boolean copyDirectory(String srcDirName, String destDirName,boolean overlay) ; 

 import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream;  import javax.swing.JOptionPane;  /**  * 复制文件或文件夹  *  * zww  */ public class CopyFileUtil {    private static String MESSAGE = "";    /**    * 复制单个文件    *    * @param srcFileName    *      待复制的文件名    * @param descFileName    *      目标文件名    * @param overlay    *      如果目标文件存在，是否覆盖    * @return 如果复制成功返回true，否则返回false    */   public static boolean copyFile(String srcFileName, String destFileName,       boolean overlay) {     File srcFile = new File(srcFileName);      // 判断源文件是否存在     if (!srcFile.exists()) {       MESSAGE = "源文件：" + srcFileName + "不存在！";       JOptionPane.showMessageDialog(null, MESSAGE);       return false;     } else if (!srcFile.isFile()) {       MESSAGE = "复制文件失败，源文件：" + srcFileName + "不是一个文件！";       JOptionPane.showMessageDialog(null, MESSAGE);       return false;     }      // 判断目标文件是否存在     File destFile = new File(destFileName);     if (destFile.exists()) {       // 如果目标文件存在并允许覆盖       if (overlay) {         // 删除已经存在的目标文件，无论目标文件是目录还是单个文件         new File(destFileName).delete();       }     } else {       // 如果目标文件所在目录不存在，则创建目录       if (!destFile.getParentFile().exists()) {         // 目标文件所在目录不存在         if (!destFile.getParentFile().mkdirs()) {           // 复制文件失败：创建目标文件所在目录失败           return false;         }       }     }      // 复制文件     int byteread = 0; // 读取的字节数     InputStream in = null;     OutputStream out = null;      try {       in = new FileInputStream(srcFile);       out = new FileOutputStream(destFile);       byte[] buffer = new byte[1024];        while ((byteread = in.read(buffer)) != -1) {         out.write(buffer, 0, byteread);       }       return true;     } catch (FileNotFoundException e) {       return false;     } catch (IOException e) {       return false;     } finally {       try {         if (out != null)           out.close();         if (in != null)           in.close();       } catch (IOException e) {         e.printStackTrace();       }     }   }    /**    * 复制整个目录的内容    *    * @param srcDirName    *      待复制目录的目录名    * @param destDirName    *      目标目录名    * @param overlay    *      如果目标目录存在，是否覆盖    * @return 如果复制成功返回true，否则返回false    */   public static boolean copyDirectory(String srcDirName, String destDirName,       boolean overlay) {     // 判断源目录是否存在     File srcDir = new File(srcDirName);     if (!srcDir.exists()) {       MESSAGE = "复制目录失败：源目录" + srcDirName + "不存在！";       JOptionPane.showMessageDialog(null, MESSAGE);       return false;     } else if (!srcDir.isDirectory()) {       MESSAGE = "复制目录失败：" + srcDirName + "不是目录！";       JOptionPane.showMessageDialog(null, MESSAGE);       return false;     }      // 如果目标目录名不是以文件分隔符结尾，则加上文件分隔符     if (!destDirName.endsWith(File.separator)) {       destDirName = destDirName + File.separator;     }     File destDir = new File(destDirName);     // 如果目标文件夹存在     if (destDir.exists()) {       // 如果允许覆盖则删除已存在的目标目录       if (overlay) {         new File(destDirName).delete();       } else {         MESSAGE = "复制目录失败：目的目录" + destDirName + "已存在！";         JOptionPane.showMessageDialog(null, MESSAGE);         return false;       }     } else {       // 创建目的目录       System.out.println("目的目录不存在，准备创建。。。");       if (!destDir.mkdirs()) {         System.out.println("复制目录失败：创建目的目录失败！");         return false;       }     }      boolean flag = true;     File[] files = srcDir.listFiles();     for (int i = 0; i < files.length; i++) {       // 复制文件       if (files[i].isFile()) {         flag = CopyFileUtil.copyFile(files[i].getAbsolutePath(),             destDirName + files[i].getName(), overlay);         if (!flag)           break;       } else if (files[i].isDirectory()) {         flag = CopyFileUtil.copyDirectory(files[i].getAbsolutePath(),             destDirName + files[i].getName(), overlay);         if (!flag)           break;       }     }     if (!flag) {       MESSAGE = "复制目录" + srcDirName + "至" + destDirName + "失败！";       JOptionPane.showMessageDialog(null, MESSAGE);       return false;     } else {       return true;     }   }    public static void main(String[] args) {     String srcDirName = "C:/test/test0/test1";     String destDirName = "c:/ttt";     CopyFileUtil.copyDirectory(srcDirName, destDirName, true);   } } 

private static void nioTransferCopy(File source, File target) {   FileChannel in = null;   FileChannel out = null;   FileInputStream inStream = null;   FileOutputStream outStream = null;   try {     inStream = new FileInputStream(source);     outStream = new FileOutputStream(target);     in = inStream.getChannel();     out = outStream.getChannel();     in.transferTo(0, in.size(), out);   } catch (IOException e) {     e.printStackTrace();   } finally {     close(inStream);     close(in);     close(outStream);     close(out);   } } 

private static void nioBufferCopy(File source, File target) {   FileChannel in = null;   FileChannel out = null;   FileInputStream inStream = null;   FileOutputStream outStream = null;   try {     inStream = new FileInputStream(source);     outStream = new FileOutputStream(target);     in = inStream.getChannel();     out = outStream.getChannel();     ByteBuffer buffer = ByteBuffer.allocate(4096);     while (in.read(buffer) != -1) {       buffer.flip();       out.write(buffer);       buffer.clear();     }   } catch (IOException e) {     e.printStackTrace();   } finally {     close(inStream);     close(in);     close(outStream);     close(out);   } } 

private static void customBufferBufferedStreamCopy(File source, File target) {   InputStream fis = null;   OutputStream fos = null;   try {     fis = new BufferedInputStream(new FileInputStream(source));     fos = new BufferedOutputStream(new FileOutputStream(target));     byte[] buf = new byte[4096];     int i;     while ((i = fis.read(buf)) != -1) {       fos.write(buf, 0, i);     }   }   catch (Exception e) {     e.printStackTrace();   } finally {     close(fis);     close(fos);   } } 

private static void customBufferStreamCopy(File source, File target) {   InputStream fis = null;   OutputStream fos = null;   try {     fis = new FileInputStream(source);     fos = new FileOutputStream(target);     byte[] buf = new byte[4096];     int i;     while ((i = fis.read(buf)) != -1) {       fos.write(buf, 0, i);     }   }   catch (Exception e) {     e.printStackTrace();   } finally {     close(fis);     close(fos);   } }