InputStreamWrite:字符流

两种读取方法如下所示：

package cn.zll.demo;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStreamReader;public class WriteDemo {    public static void main(String[] args) throws IOException {        InputStreamReader reader=new InputStreamReader(new FileInputStream("out.txt"));//      int len=0;//      while((len=reader.read())!=-1){//          //          System.out.print((char)len);//          //          //      }        int len=0;        char[] b=new char[1024];        while((len=reader.read(b))!=-1){            System.out.println(new String(b, 0, len));        }    }}