字节跳动JAVA Java的字节流

Java的字节流字节输入流package com.cnblogs;import java.io.*;/*本类用于测试字节流的读取 */public class TestIn {public static void main(String[] args) {//method();//普通读取method2();//高效}private static void method() {InputStream in = null;try {//InputStream in2 = new FileInputStream(new File("E:\\ready\\1.txt"));in = new FileInputStream("E:\\ready\\1.txt");/*一次读取一个字节，如果没有数据了，返回-1*///System.out.println(in.read());//97//System.out.println(in.read());//98//System.out.println(in.read());//99//System.out.println(in.read());//-1//System.out.println(in.read());//-1int result = 0;while ((result = in.read()) != -1){System.out.println(result);}} catch (Exception e) {e.printStackTrace();/*finally代码块是try-catch结构中一定会执行到的部分，常用于关流操作，为防止因发生异常没有正确关流，不能写在try{}当中，这点需要注意*/}finally {try {in.close();} catch (IOException e) {e.printStackTrace();}}}private static void method2() {BufferedInputStream in1 = null;try {in1 = new BufferedInputStream(new FileInputStream("E:\\ready\\1.txt"));int result = 0;while((result = in1.read()) != -1){System.out.println(result);}} catch (Exception e) {e.printStackTrace();}finally {try {in1.close();} catch (IOException e) {e.printStackTrace();}}}}字节输出流【字节跳动JAVA Java的字节流】package com.cnblogs;import java.io.*;/*本类用于测试字节输出流 */public class TestOut {public static void main(String[] args) {//method();method2();}private static void method() {OutputStream out = null;try {out = new FileOutputStream("E:\\ready\\1.txt",true);out.write(98);out.write(99);out.write(100);/*还可以使用两个参数的构造方法，来控制输出的数据是覆盖还剩追加，默认为false，覆盖如果为追加，第二个参数为true*/} catch (Exception e) {e.printStackTrace();} finally {try {out.close();//关流后没法写入了} catch (IOException e) {e.printStackTrace();}}}private static void method2() {OutputStream out = null;try {out =new BufferedOutputStream(new FileOutputStream("E:\\ready\\1.txt",true)) ;out.write(101);out.write(102);out.write(103);out.write(104);out.write(105);/*还可以使用两个参数的构造方法，来控制输出的数据是覆盖还剩追加，默认为false，覆盖如果为追加，第二个参数为true*/} catch (Exception e) {e.printStackTrace();} finally {try {out.close();//关流后没法写入了} catch (IOException e) {e.printStackTrace();}}}}