Java基础知识强化之IO流笔记32：转换流之InputStreamReader的使用

1 public int read()

1 public int read(char[] cbuf)

 1 package cn.itcast_02;
 2 
 3 import java.io.FileInputStream;
 4 import java.io.IOException;
 5 import java.io.InputStreamReader;
 6 
 7 /*
 8  * InputStreamReader(InputStream is):用默认的编码读取数据
 9  * InputStreamReader(InputStream is,String charsetName):用指定的编码读取数据
10  */
11 public class InputStreamReaderDemo {
12     public static void main(String[] args) throws IOException {
13         // 创建对象
14         // InputStreamReader isr = new InputStreamReader(new FileInputStream(
15         // "osw.txt"));
16 
17         // InputStreamReader isr = new InputStreamReader(new FileInputStream(
18         // "osw.txt"), "GBK");
19 
20         InputStreamReader isr = new InputStreamReader(new FileInputStream(
21                 "osw.txt"), "UTF-8");
22 
23         // 读取数据
24         // 一次读取一个字符
25         int ch = 0;
26         while ((ch = isr.read()) != -1) {
27             System.out.print((char) ch);
28         }
29 
30         // 释放资源
31         isr.close();
32     }
33 }