📅 最后修改于: 2020-09-27 07:21:56 🧑 作者: Mango
InputStreamReader是从字节流到字符流的桥梁：它读取字节，并使用指定的字符集将其解码为字符。它使用的字符集可以按名称指定，也可以显式指定，也可以接受平台的默认字符集。
| Constructor name | Description |
|---|---|
| InputStreamReader(InputStream in) | It creates an InputStreamReader that uses the default charset. |
| InputStreamReader(InputStream in, Charset cs) | It creates an InputStreamReader that uses the given charset. |
| InputStreamReader(InputStream in, CharsetDecoder dec) | It creates an InputStreamReader that uses the given charset decoder. |
| InputStreamReader(InputStream in, String charsetName) | It creates an InputStreamReader that uses the named charset. |
| Modifier and Type | Method | Description |
|---|---|---|
| void | close() | It closes the stream and releases any system resources associated with it. |
| String | getEncoding() | It returns the name of the character encoding being used by this stream. |
| int | read() | It reads a single character. |
| int | read(char[] cbuf, int offset, int length) | It reads characters into a portion of an array. |
| boolean | ready() | It tells whether this stream is ready to be read. |
public class InputStreamReaderExample {
public static void main(String[] args) {
try {
InputStream stream = new FileInputStream("file.txt");
Reader reader = new InputStreamReader(stream);
int data = reader.read();
while (data != -1) {
System.out.print((char) data);
data = reader.read();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
输出：
I love my country
The file.txt contains text "I love my country" the InputStreamReader
reads Character by character from the file