zoukankan      html  css  js  c++  java
  • 字节输出流和输入流copy图片

    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    
    public class demo7 {
    
        /**
         * @param args
         * @throws IOException 
         */
        public static void main(String[] args) {
            // TODO Auto-generated method stub
          PopyImage();
        }
        
        public static void PopyImage() {
            long time1 = System.currentTimeMillis();
            
            //找路径
            File file = new File("C:\Users\zhangheng\Desktop\d9cf11161c4ed2ad.jpg");
            //输入流 通道
            FileInputStream fileInputStream = null;
            try {
                fileInputStream = new FileInputStream(file);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    //        缓冲区
            byte[] by =new byte[1024];
    //        读取数据
            int count =0;
            //图片的路径
            File file1 = new File("C:\Users\zhangheng\Desktop\dd.jpg");
            //输出流通道
            FileOutputStream fileOutputStream = null;
            try {
                fileOutputStream = new FileOutputStream(file1);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } 
            //读取数据
            try {
                while((count = fileInputStream.read(by)) !=-1){
                    
    //            System.out.println(new String(by,0,count));
                    //写数据
                    fileOutputStream.write(by);
                    
                    
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            //后进的先关
            try {
                fileOutputStream.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    //        先进的后关
            try {
                fileInputStream.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
            long time2 =System.currentTimeMillis();
            System.out.println((time2-time1));
        }
    
    }
  • 相关阅读:
    Service Discovery
    Spring security框架原理
    Redis作者谈Redis应用场景
    redis持久化RDB和AOF-转载
    MongoDB树形结构表示法
    Tomcat Connector
    ActiveMQ 负载均衡与高可用(转载)
    JS选取DOM元素的方法
    IObit Driver Booster 无法更新驱动的解决办法
    python 学习备忘
  • 原文地址:https://www.cnblogs.com/zhv5/p/6134704.html
Copyright © 2011-2022 走看看