package com.wbg.iodemo1128;import java.io.*;public class OutputStreamDemo {public static void main(String[] args) throws IOException {reader();}//输入字节流inputStreamstatic void inputStream() throws IOException {File f=new File("F:"+File.separator+"test01.txt");InputStream inputStream=new FileInputStream(f);byte b[]=new byte[1024];inputStream.read(b);inputStream.close();System.out.println(new String(b));}//输出字节流OutputStreamstatic void outputStream()throws IOException{//第一步：使用File找到一个文件File f=new File("F:"+File.separator+"test01.txt");//创建文件
        f.createNewFile();//第二步：通过子类实例化父类对象OutputStream out=new FileOutputStream(f);//第三步：写一个字符串String str="Hello World!!!";//第四步：字符串转为byte数组byte b[]=str.getBytes();//第五步：内容输出
        out.write(b);//第六步：关闭
        out.close();}//字符流输出static void writer() throws IOException {//第一步：使用File找到一个文件File f=new File("f:"+File.separator+"test.txt");//第二步：通过子类实例化父类对象Writer out=new FileWriter(f);//追加// Writer out=new FileWriter(f,true);//第三：定义字符串String str="Hello,Word!!!";//第四步:输出
        out.write(str);//第五步：强制清空缓存
        out.flush();//第六步：关闭
         out.close();}//字符流正常输入static void reader() throws IOException {//第一步：使用File找到一个文件File f=new File("f:"+File.separator+"test.txt");Reader readerout=new FileReader(f);int len=0;char[]c=new char[1024];int temp=0;while ((temp=readerout.read())!=-1){c[len]=(char)temp;len++;}readerout.close();System.out.println(new String(c,0,len));}//字符流输入追加static void readerAdd() throws IOException {File f=new File("f:"+File.separator+"test.txt");Reader reader=new FileReader(f);char[]c=new char[(int)f.length()];reader.read(c);reader.close();System.out.println(new String(c));}
}