Java: 递归删除文件夹内容

 Java: 递归删除文件夹内容
由于java没有直接提供文件夹删除的函数，只能删除已空文件夹，所以自己写了一个。

public static void deleteDirectory(File file)...{
        try...{
            if(file.exists()&&file.isDirectory())...{
                String[] contents = file.list();
                for(int i=0;i<contents.length;i++)...{
                    File file2X = new File(file.getAbsolutePath() + "/" +contents[i]);
                    if(file2X.exists())...{
                        if(file2X.isFile())...{
                            file2X.delete();
                        }else if(file2X.isDirectory())...{
                            deleteDirectory(file2X);
                        }
                    }else...{
                        throw new RuntimeException("File not exist!");
                    }
                }
                file.delete();
            }else...{
                throw new RuntimeException("Not a directory!");
            }
        }catch(Exception e)...{
            e.printStackTrace();
        }
    }