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Java_从指定的目录下拷贝所有指定类型文件到output目录

 1 import java.io.*;
 2 
 3 public class MainCopy {
 4  
 5     private int directoryCount = 0;
 6     private int fileCount = 0;
 7     private int replayCount = 0;
 8     private int alreadyCount = 0;
 9  
10     public void findFile(String inPath, final String outPath) {
11         File file = new File(inPath);
12         if (file.isDirectory()) {
13             directoryCount++;
14             File[] files = file.listFiles();
15             for (final File f : files) {
16                 if (f.isDirectory()) {
17                     directoryCount++;
18                     new Thread() {
19                         public void run() {
20                         }
21                     }.start();
22                     findFile(f.getPath(), outPath);
23                 }
24                 if (f.isFile()) {
25                     fileCount++;
26                     if (f.getName().endsWith(".mp3")) {
27                         File newFile = new File(outPath + "/" + f.getName());
28                         if (newFile.exists()) {
29                             replayCount++;
30                             System.out.println("file is exist" + f.getPath());
31                         } else {
32                             synchronized (newFile) {
33                                 writeToFile(f, newFile);
34                             }
35                             alreadyCount++;
36                             System.out.println("copy :" + f.getPath());
37                         }
38                     } else {
39                         System.out
40                                 .println("---------------------------------------other file type:"
41                                         + f.getName());
42                     }
43                 }
44             }
45         }
46     }
47     public void writeToFile(File in, File out) {
48         FileInputStream fis = null;
49         FileOutputStream fos = null;
50         try {
51             fis = new FileInputStream(in);
52             fos = new FileOutputStream(out);
53             byte[] buffer = new byte[1024];
54             int len = 0;
55             while ((len = fis.read(buffer)) > 0) {
56                 fos.write(buffer, 0, len);
57             }
58             fos.close();
59             fis.close();
60         } catch (FileNotFoundException e) {
61             e.printStackTrace();
62         } catch (IOException e) {
63             e.printStackTrace();
64         }
65     }
66     public static void main(String[] args) {
67         MainCopy c = new MainCopy();
68         long startTime = System.currentTimeMillis();
69         c.findFile("D:/31-60", "D:/E_pod");
70         System.out.println(c.directoryCount);
71         System.out.println(c.fileCount);
72         System.out.println(c.alreadyCount);
73         long endTime = System.currentTimeMillis();
74         System.out.println("time count:"+(endTime-startTime)+"ms");
75     }
76 }

import java.io.*;

public class MainCopy {
 
    private int directoryCount = 0;
    private int fileCount = 0;
    private int replayCount = 0;
    private int alreadyCount = 0;
 
    public void findFile(String inPath, final String outPath) {
        File file = new File(inPath);
        if (file.isDirectory()) {
            directoryCount++;
            File[] files = file.listFiles();
            for (final File f : files) {
                if (f.isDirectory()) {
                    directoryCount++;
                    new Thread() {
                        public void run() {
                        }
                    }.start();
                    findFile(f.getPath(), outPath);
                }
                if (f.isFile()) {
                    fileCount++;
                    if (f.getName().endsWith(".mp3")) {
                        File newFile = new File(outPath + "/" + f.getName());
                        if (newFile.exists()) {
                            replayCount++;
                            System.out.println("file is exist" + f.getPath());
                        } else {
                            synchronized (newFile) {
                                writeToFile(f, newFile);
                            }
                            alreadyCount++;
                            System.out.println("copy :" + f.getPath());
                        }
                    } else {
                        System.out
                                .println("---------------------------------------other file type:"
                                        + f.getName());
                    }
                }
            }
        }
    }
    public void writeToFile(File in, File out) {
        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            fis = new FileInputStream(in);
            fos = new FileOutputStream(out);
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = fis.read(buffer)) > 0) {
                fos.write(buffer, 0, len);
            }
            fos.close();
            fis.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        MainCopy c = new MainCopy();
        long startTime = System.currentTimeMillis();
        c.findFile("D:/31-60", "D:/E_pod");
        System.out.println(c.directoryCount);
        System.out.println(c.fileCount);
        System.out.println(c.alreadyCount);
        long endTime = System.currentTimeMillis();
        System.out.println("time count:"+(endTime-startTime)+"ms");
    }
}

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原文地址：https://www.cnblogs.com/charles999/p/6961352.html