输入输出流之URL网上下载图片

た入场券 2021-11-05 14:32 227阅读 0赞

### URL概述 ###

![20190807101343880.png][]

![20190807135600617.png][]

package com.vince;
    import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.net.HttpURLConnection;
    import java.net.MalformedURLException;
    import java.net.URL;
    
    public class URLDemo {
        public static void main(String[] args) {
            try {
                URL url = new URL("https://ss1.baidu.com/6ONXsjip0QIZ8tyhnq/it/u=3284403661,3037645860&fm=173&app=25&f=JPEG?w=218&h=146&s=7F200FC3424318EC643CD59E0300A013");
                //打开链接方式
                HttpURLConnection conn=(HttpURLConnection) url.openConnection();
                //输入流获取图片
                BufferedInputStream in = new BufferedInputStream(conn.getInputStream());
                //新建一个文件输出流用以储存图片位置
                BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("C:\\ss.jpg"));
                //创建byte数组并设置大小
                byte[] bytes = new byte[1024];
                //设置图片起点存储位置
                int len = -1;
                //输入流读取图片未读取结束
                while((len=in.read(bytes)) != -1){
                    //边读写入bytes字节数组中
                    out.write(bytes,0,len);
                    out.flush();
                }
                in.close();
                out.close();
                System.out.println("下载成功");
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

![20190807135823697.png][]

[20190807101343880.png]: /images/20211105/c8ddf36bd7684863932c538a1535ee61.png
[20190807135600617.png]: /images/20211105/1a51ba3f0e8b4c36b72aa22bdfdc0fb9.png
[20190807135823697.png]: /images/20211105/dc2995d69a284dd888d4a01fe3e02f6d.png