递归文件夹查找指定文件

• 方式一：java8新增api

  public static void findFilesByPath1(Path dirPath) {
      try {
          Files.walkFileTree(dirPath, new SimpleFileVisitor<Path>() {
              @Override
              public FileVisitResult visitFile(Path filePath, BasicFileAttributes attrs) {
                  if (filePath.toString().endsWith(".xml")) {
                      
                      System.out.println("find file = " + filePath.getFileName());
                      
                      return FileVisitResult.CONTINUE;
                  }
                  return FileVisitResult.SKIP_SUBTREE;
              }
  
              //失败，可能是文件没有访问权限等，直接过滤掉
              @Override
              public FileVisitResult visitFileFailed(Path filePath, IOException exception) throws IOException {
                  if (exception instanceof AccessDeniedException) {
                      return FileVisitResult.SKIP_SUBTREE;
                  }
                  return super.visitFileFailed(filePath, exception);
              }
          });
      } catch (IOException e) {
          e.printStackTrace();
      }
  }
  

• 方式二：递归方式

  public static void findFilesByPath2(Path path) throws IOException {
  
          if (Files.isDirectory(path)) {
              Files.list(path).forEach(newPath -> {
                  try {
                      findFilesByPath2(newPath);
                  } catch (IOException e) {
  //                    e.printStackTrace();
                  }
              });
          } else {
              if (path.toString().endsWith(".xml")) {
                  System.out.println("find file = " + path.getFileName());
              }
          }
      }
  

  调用方式：

  findFilesByPath1(Paths.get("E:\\"));
  findFilesByPath2(Paths.get("E:\\"));