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-----------------------
FileVisitor
|
-----------------------
#
文件递归接口
#
一般都是在
Files
静态方法使用
Path
walkFileTree
(
Path
start
,
FileVisitor
<?
super
Path
>
visitor
);
#
预定义实现
SimpleFileVisitor
*
全部是默认返回
CONTINUE
*
仅仅需要覆写需要的方法即可
#
抽象方法
FileVisitResult
visitFile
(
Path
file
,
BasicFileAttributes
attrs
)
#
它表示正在访问某个文件
FileVisitResult
visitFileFailed
(
Path
file
,
IOException
exc
)
#
它表示访问某个文件的时候发生了异常
FileVisitResult
preVisitDirectory
(
Path
dir
,
BasicFileAttributes
attrs
)
#
在访问一个目录之前执行
,
包括当前递归的目录
FileVisitResult
postVisitDirectory
(
Path
dir
,
IOException
exc
)
#
在访问完毕一个目录之后执行
#
通过实现这4个方法并根据情况返回相应的遍历动作
,
程序可以很容易地控制整个遍历过程
,
并在遍历中对整个目录树进行修改
。
-----------------------
FileVisitResult
|
-----------------------
#
用来声明整个遍历过程的下一步动作
。
#
枚举值
CONTINUE
*
表示继续进行正常的遍历过程
SKIP_SIBLINGS
*
表示跳过当前目录或文件的兄弟节点
SKIP_SUBTREE
*
表示不再遍历当前目录中的内容
TERMINATE
*
表示立即结束整个遍历过程
。
You can’t perform that action at this time.