ByteArrayInputStream:是把字节数组当成源的输入流

String string="hello shanghai";    ByteArrayInputStream bis=new ByteArrayInputStream(string.getBytes());    int data=-1;    while ((data=bis.read())!=-1) {        System.out.print((char)data);            }    //bis.close();无效

 

ByteArrayOutputStream:是把字节数组当做目标的输出流

ByteArrayOutputStream bos=new ByteArrayOutputStream();     bos.write(97);     bos.write("hello world".getBytes());     byte[] buff=bos.toByteArray();     for(byte data:buff) {         System.out.println((char)data);     }          FileOutputStream fos=new FileOutputStream("D:\\aa.txt",true);     bos.writeTo(fos);//把 ByteArrayOutputStream内部缓冲区的数据写到对应的文件输出流中     fos.close();