1. 构造函数
  2. 文件
  3. fromRawPath
  4. fromUri
  5. 属性
  6. absolute
  7. hashCode
  8. isAbsolute
  9. parent
  10. path
  11. runtimeType
  12. uri
  13. 方法
  14. copy
  15. copySync
  16. create
  17. createSync
  18. delete
  19. deleteSync
  20. exists
  21. existsSync
  22. lastAccessed
  23. lastAccessedSync
  24. lastModified
  25. lastModifiedSync
  26. length
  27. lengthSync
  28. noSuchMethod
  29. open
  30. openRead
  31. openSync
  32. openWrite
  33. readAsBytes
  34. readAsBytesSync
  35. readAsLines
  36. readAsLinesSync
  37. readAsString
  38. readAsStringSync
  39. rename
  40. renameSync
  41. resolveSymbolicLinks
  42. resolveSymbolicLinksSync
  43. setLastAccessed
  44. setLastAccessedSync
  45. setLastModified
  46. setLastModifiedSync
  47. stat
  48. statSync
  49. toString
  50. watch
  51. writeAsBytes
  52. writeAsBytesSync
  53. writeAsString
  54. writeAsStringSync
  55. 运算符
  56. operator ==