递归搜索文件

﹏ヽ暗。殇╰゛Y 2022-09-28 13:21 177阅读 0赞

package mypackage;
    import java.io.File;
    public class DeleteDirectory extends File
    {
     private String directoryNameToDelete = "b";
     
     public DeleteDirectory(String fileName)
     {
      super(fileName);
     }
     
     
     //从自身开始，搜索特定名称的目录，找到则删除
     public void searchDirectory()
     {
      //如果此文件对象是目录
      if(isDirectory())
      {
       //找到了，删除文件对象所表示的目录
       if(getName().equals(this.directoryNameToDelete))
       {
        deleteDirectory();
       }
       //此目录不是我们想要找的，则对该目录下的所有子目录对象进行递归搜索
       else 
       {
        String listFiles[] = list();
        
        for(String entry : listFiles)
        {
         DeleteDirectory child = new DeleteDirectory(getPath() + separatorChar + entry);
         
         //递归搜索
          child.searchDirectory();
        }
       }
      }
     }
     
     
     //删除目录，及其下面包含的所有目录和文件
     public void deleteDirectory()
     {
      boolean isDeleted = delete();   //先删除自身
      
      //未删除成功，则表示此目录不为空，则对此目录下的所有目录和文件进行递归删除
      if(!isDeleted)
      {
       String fileNames[] = list();
       
       for(String entry : fileNames)
       {
        DeleteDirectory child = new DeleteDirectory(getPath() + separatorChar + entry);
        
        if(child.isDirectory())
        {
         child.deleteDirectory(); //递归删除
        } 
        else
        {
         child.delete(); 
        }
       }
       
       delete(); //递归删除子目录及文件后，再删除自身
      }
     }
     
     
     public static void main(String[] args)
     {
      DeleteDirectory lf = new DeleteDirectory("E://a");
      lf.searchDirectory();
     }
    }