處理IO的一些Java工具類包：Commons-IO
Commons項目中用來處理IO的一些工具類包。
Commons IO is a library of utilities to assist with developing IO functionality. There are four main areas included:
●Utility classes - with static methods to perform common tasks
●Filters - various implementations of file filters
●Comparators - various implementations of java.util.Comparator for files
●Streams - useful stream, reader and writer implementations
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| This package defines utility classes for working with streams, readers, writers and files. |
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| This package provides various Comparator implementations for Files. |
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| This package defines an interface (IOFileFilter) that combines both FileFilter and FilenameFilter. |
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| This package provides implementations of input classes, such as InputStream and Reader. |
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| This |
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下面是一些示例代碼：
//直接將IO流轉成字符串
InputStream in = new URL( "http://jakarta.apache.org" ).openStream();
try {
System.out.println( IOUtils.toString( in ) );
} finally {
IOUtils.closeQuietly(in);
}
//讀取文本文件的所有行
File file = new File("/commons/io/project.properties");
List lines = FileUtils.readLines(file, "UTF-8");
//路徑處理
String filename = "C:/commons/io/../lang/project.xml";
String normalized = FilenameUtils.normalize(filename);
// result is "C:/commons/lang/project.xml"
//獲取目錄空間
long freeSpace = FileSystemUtils.freeSpace("C:/");
//打印文件的所有行
LineIterator it = FileUtils.lineIterator(file, "UTF-8");
try {
while (it.hasNext()) {
String line = it.nextLine();
/// do something with line
}
} finally {
LineIterator.closeQuietly(iterator);
}