IO练习 两个文件夹进行copy（含子目录）

Posted 2020-09-20

 1 //从键盘接收两个文件夹路径,把其中一个文件夹中(包含内容)拷贝到另一个文件夹中
 2     @Test
 3     public void t6(){
 4         //1) 接受两个文件夹路径
 5             //1.创建一个 字符缓冲流
 6            
 7             BufferedReader br = null; 
 8             try {
 9                 br = new BufferedReader(new InputStreamReader(System.in));
10                 System.out.println("请输入第一个文件夹路径");
11                 //2.读取2行字符串
12                 String str1 = br.readLine();
13                 System.out.println("请输入第二个文件夹路径");
14                 String str2 = br.readLine();
15                 File file1 = new File(str1);
16                 File file2 = new File(str2);
17                 file2.mkdir();
18                 File[] listFiles = file1.listFiles();
19                 for(int i=0;i<listFiles.length;i++){
20                     if(listFiles[i].isFile()){
21                         File target = new File(file2, listFiles[i].getName());
22                         copyFile(listFiles[i], target);
23                     }
24                      if(listFiles[i].isDirectory()){
25                             //文件夹下面还是个文件夹,这个时候去拿到文件夹的路径
26                             String source1 = str1+File.separator+listFiles[i].getName();
27                             String target1 = str2+File.separator+listFiles[i].getName();
28                             copyDir(source1,target1);
29                         }
30                 }
31      
40             } catch (FileNotFoundException e) {
41                 e.printStackTrace();
42             } catch (IOException e) {
43                 e.printStackTrace();
44             }finally{
45                 try {
46                     br.close();
47                 } catch (IOException e) {
48                     // TODO Auto-generated catch block
49                     e.printStackTrace();
50                 }
51             }
52     }
53     private void copyDir(String source1, String target1) throws IOException {
54          File source = new File(source1);
55          File target = new File(target1);
56          target.mkdirs();
57          File[] files = source.listFiles();
58          for(int a=0;a<files.length;a++){
59              if(files[a].isFile()){
60                  File target2 = new File(target,files[a].getName());
61                  copyFile(files[a], target2);
62              }
63              if(files[a].isDirectory()){
64                  String source3 = source1 +File.separator + files[a].getName();
65                  String target3 = target1 +File.separator + files[a].getName();
66                  //递归,对还是文件夹的文件夹在调用copyDir的方法,上面的if条件是递归的出口
67                  copyDir(source3,target3);
68              }
69          }
70     }
71     private void copyFile(File file, File target) throws IOException {
72          BufferedInputStream bis = new BufferedInputStream(
73                     new FileInputStream(file));
74             BufferedOutputStream bos = new BufferedOutputStream(
75                     new FileOutputStream(target));
76             byte[] buf = new byte[1024];
77             int len = 0;
78             while((len=bis.read(buf))!= -1){
79                 bos.write(buf, 0,len);
80             }
81             bis.close();
82             bos.close();
83         }