java IO流——字节流

字节流主要操作byte类型数据，以byte数组为准，主要操作类有InputStream(字节输入流)、OutputSteam（字节输出流）由于IputStream和OutputStream都是抽象类，所要要用这两个类的话，则首先要通过子类实例化对象。下面就是这两个类的一些子类结构图

private static void encodeAndeDecodeDemo() throws IOException {
InputStreamReader isr=new InputStreamReader(System.in,"gbk");
System.out.println("kind of encode :"+isr.getEncoding());
BufferedReader br=new BufferedReader(isr);
OutputStreamWriter osw=new OutputStreamWriter(new  FileOutputStream("date2.txt"),"gbk");
System.out.println("kind of encode :"+osw.getEncoding());
BufferedWriter bw=new BufferedWriter(osw);
String str=null;
while(!(str=br.readLine()).equals("over"))
{
System.out.println(str);
bw.write(str);
bw.newLine();
bw.flush();
}
bw.close();

isr=new InputStreamReader(new  FileInputStream("date2.txt"),"utf-8");
System.out.println("kind of encode :"+isr.getEncoding());
br=new BufferedReader(isr);
System.out.println(br.readLine());
br.close();
}

View Code

结果：出现乱码。