AS3 - 对文件和目录的操作

1，写入到文件

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var fileObj:File = File.documentsDirectory.resolvePath("hangge.txt"); var fs:FileStream = new FileStream(); fs.open(fileObj, FileMode.WRITE); fs.writeUTFBytes("hangge.com"); fs.close();

 

2，更新文件内容
（1）下面例子在第5个字节开始覆写内容

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var fileObj:File = File.documentsDirectory.resolvePath("hangge.txt"); var fs:FileStream = new FileStream(); fs.open(fileObj, FileMode.UPDATE); fs.position = 5; fs.writeUTFBytes(".yuhang"); fs.close();

（2）下面例子将内容添加到文件末尾

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var fileObj:File = File.documentsDirectory.resolvePath("hangge.txt"); var fs:FileStream = new FileStream(); fs.open(fileObj, FileMode.APPEND); fs.writeUTFBytes("www.hangge.com"); fs.close();

 

3，读取文件内容

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var fileObj:File = File.documentsDirectory.resolvePath("hangge.txt"); var fs:FileStream = new FileStream(); fs.open(fileObj, FileMode.READ); var str:String = fs.readUTFBytes(fs.bytesAvailable); fs.close();

 

4，移动文件

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var originalFile:File =  File.documentsDirectory.resolvePath("hangge.txt"); var newDir:File =  File.applicationStorageDirectory.resolvePath("hangge.txt"); originalFile.moveTo(newDir);

 

5，复制文件

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var originalFile:File =  File.documentsDirectory.resolvePath("hangge.txt"); var newDir:File =  File.applicationStorageDirectory.resolvePath("hangge.txt"); originalFile.copyTo(newDir);

 

6，删除文件

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var fileObj:File = File.documentsDirectory.resolvePath("hangge.txt"); if(fileObj.exists){     fileObj.deleteFile(); }

 

7，创建文件夹

1 2	var fileDir:File = File.documentsDirectory.resolvePath("hangge"); fileDir.createDirectory();

 

8，移动文件夹

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var originalDir:File =  File.documentsDirectory.resolvePath("hangge"); var newDir:File =  File.applicationStorageDirectory.resolvePath("hangge"); originalDir.moveTo(newDir);

 

9，复制文件夹

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var originalDir:File =  File.documentsDirectory.resolvePath("hangge"); var newDir:File =  File.applicationStorageDirectory.resolvePath("hangge"); originalDir.copyTo(newDir);

 

10，删除文件夹

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var fileDir:File = File.documentsDirectory.resolvePath("hangge"); if(fileDir.exists){     fileDir.deleteDirectory(); }