java io 学习笔记 (字符流) 2
字符流的处理和字节流差不多，API基本上完全一样，就是计量单位不同。另外字符流还提供一些其他的处理流，比如按行读取流、字符串流等等。
下面给个例子看看：
import java.io.*; /** * 字符流测试 * * @author 赵永恩 */ public class TestIOStream { public static void main(String[] args) { testReaderWriter(); testLineNumberReader(); } /** * 带缓冲的字符流 */ public static void testReaderWriter() { int bufsize = 25; try { BufferedReader bufferedReader = new BufferedReader(new FileReader(new File("C:\\x.txt"))); BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(new File("C:\\xb.txt"))); char buf[] = new char[bufsize]; //字符缓冲区 while (bufferedReader.read(buf) != -1) { bufferedWriter.write(buf); } bufferedWriter.flush(); bufferedReader.close(); bufferedWriter.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * 按行读取的字符流 */ public static void testLineNumberReader() { try { LineNumberReader lineNumberReader = new LineNumberReader(new BufferedReader(new FileReader(new File("C:\\x.txt")))); String lineString; //行字符串变量 int x = 0; //行号 while ((lineString = lineNumberReader.readLine()) != null) { x++; System.out.println("行号：" + x + " >>>" + lineString); } lineNumberReader.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }