apache.commons.io 学习

hncys

　　Commons IO is a library of utilities to assist with developing IO functionality.

　　
There are six main areas included:

• 
  Utility classes
  - with static methods to perform common tasks
  
• 
  Input
  - useful Input Stream and Reader implementations
  
• 
  Output
  - useful Output Stream and Writer implementations
  
• 
  Filters
  - various implementations of file filters
  
• 
  Comparators
  - various implementations of java.util.Comparator
  for files
  
• 
  File Monitor
  - a component for monitoring file system events
  

org.apache.commons.io.FileSystemUtils


　　FileSystemUtils 可以获得指定磁盘路径的可用空间

org.apache.commons.io.FileUtil

　　FileUtils.readLines
(
file, 
"UTF-8"
)
;

　　FileUtils.writeStringToFile(file, name);
文本写入指定文件


　　FileUtils.copyURLToFile(url, file); 
网络流保存为文件
　　FileUtils.sizeOfDirectory(dir); 

目录大小


　　FileUtils.getTempDirectoryPath();获得临时文件夹路径
　　FileUtils.touch(f); 把文件的修改时间修改成当前时刻

org.apache.commons.io.
monitor