Java I/O流-ByteArrayInputStream、ByteArrayOutputStream

来源：互联网发布：java gradle 编辑：程序博客网时间：2024/05/17 04:56

一、整体代码图

ByteArrayStreamDemo.java

import java.io.*;class ByteArrayStreamDemo {public static void main(String[] args) {// TODO: Add your code hereString tmp="abcdefjklmnopqrst";byte [] src=tmp.getBytes();ByteArrayInputStream input=new ByteArrayInputStream(src);ByteArrayOutputStream output=new ByteArrayOutputStream();//这里不用传递字节数组，ByteArrayOutputStream会自动创建一个32字节的缓冲区用来写入数据"Creates a new byte array output stream."transform(input,output);byte[] result=output.toByteArray(); //public byte[] toByteArray() "Creates a newly allocated byte array. Its size is the current size of this output stream and the valid contents of the buffer have been copied into it."System.out.println(new String(result));System.out.println(new String(src));}public static void transform(InputStream in,OutputStream out){int ch=0;try{while((ch=in.read())!=-1){int upperCh=/*(int)*/Character.toUpperCase((char)ch); //char表示的范围比int小out.write(upperCh);}}catch(Exception e){e.printStackTrace();}}}

二、解释

代码地址：https://github.com/jltxgcy/Demo