Java基础知识强化之IO流笔记33：转换流之InputStreamReader的使用

 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();
}
}