import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilterInputStream;
import java.io.IOException;

public class FileInputStreamDemo {
    public static void main(String[] args) throws IOException {
        methord();
        methord1();
    }

    private static void methord1() throws IOException {
        // TODO Auto-generated method stub
        FileInputStream fi = new FileInputStream("E:/lishuai.java");
        byte[] b = new byte[2014];
        int len;
        while ((len = fi.read(b)) != -1) {
            String s = new String(b, 0, len);
            System.out.println(s);
        }
    }

    private static void methord() throws IOException {
        // TODO Auto-generated method stub
        FileInputStream fi = new FileInputStream("E:/lishuai.java");
        int a;
        while ((a = fi.read()) != -1) {
            System.out.print((char) a);
        }
    }
}

上面是字節(jié)輸入流的兩個(gè)模版，methord方法是以字節(jié)為單位進(jìn)行輸入，methord1方法是以數(shù)組為單位進(jìn)行輸入。methord1方法最后將數(shù)組轉(zhuǎn)換成字符串類型的時(shí)候要規(guī)定長度以免空間的浪費(fèi)。