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();         }     } }