public int read()

 public int read(char[] cbuf)

 package cn.itcast_02;

 import java.io.FileInputStream;

 import java.io.IOException;

 import java.io.InputStreamReader;

 /*

  * InputStreamReader(InputStream is):用默认的编码读取数据

  * InputStreamReader(InputStream is,String charsetName):用指定的编码读取数据

  */

 public class InputStreamReaderDemo {

     public static void main(String[] args) throws IOException {

         // 创建对象

         // InputStreamReader isr = new InputStreamReader(new FileInputStream(

         // "osw.txt"));

         // InputStreamReader isr = new InputStreamReader(new FileInputStream(

         // "osw.txt"), "GBK");

         InputStreamReader isr = new InputStreamReader(new FileInputStream(

                 "osw.txt"), "UTF-8");

         // 读取数据

         // 一次读取一个字符

         int ch = 0;

         while ((ch = isr.read()) != -1) {

             System.out.print((char) ch);

         }

         // 释放资源

         isr.close();

     }

 }