IOUtils is a general IO stream manipulation utilities. This class provides static utility methods for input/output operations.
- closeQuietly - these methods close a stream ignoring nulls and exceptions
- toXxx/read - these methods read data from a stream
- write - these methods write data to a stream
- copy - these methods copy all the data from one stream to another
- contentEquals - these methods compare the content of two streams
Constant Field Values
| Modifier and Type | Field | Description |
| static char | DIR_SEPARATOR | The system directory separator character. |
| static char | DIR_SEPARATOR_UNIX | The Unix directory separator character. |
| static char | DIR_SEPARATOR_WINDOWS | The Windows directory separator character. |
| static int | EOF | Represents the end-of-file (or stream). |
| static String | LINE_SEPARATOR | The system line separator string. |
| static String | LINE_SEPARATOR_UNIX | The Unix line separator string. |
| static String | LINE_SEPARATOR_WINDOWS | The Windows line separator string. |
Common Methods
closeQuietly: Close a stream ignoring nulls and exceptions.
InputStream in = ...;
try {
// do something with the stream
} finally {
IOUtils.closeQuietly(in);
}
readLines: Gets the contents of an InputStream as a list of Strings, one entry per line.
List<String> lines = IOUtils.readLines(in);
toByteArray: Gets the contents of an InputStream(, String, URL) as a byte[].
byte[] byteArray = IOUtils.toByteArray(new URL("http://www.example.com/"));
toCharArray: Gets the contents of an InputStream(, Reader) as a character array.
char[] byteArray = IOUtils.toCharArray(in);
toInputStream: Converts the specified string(, CharSequence) to an input stream.
InputStream in = IOUtils.toInputStream("string");
toString: Gets the contents of an InputStream(, byte[], URL...) as a String
String str = IOUtils.toString(in);