Java之复制图片

从文件夹中复制图片

从这个文件夹：

复制到这个空的文件夹：

代码如下：

 import java.io.*;
import java.util.Scanner;

    /**
     * 普通文件的复制
     */
    public class TestDome10 {
        public static void main(String[] args) {
            // 输入两个路径
            // 从哪里(源路径)拷贝到哪里(目标路径)
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入要拷贝源文件的路径:");
            String srcPath = scanner.next("G:/photo/sb/kkkk.jpeg");
            System.out.println("请输入要拷贝到的目标路径:");
            String destPath = scanner.next("G:/Program/xxx/kkkk.jpeg");
            File srcFile = new File(srcPath);
            if (!srcFile.isFile()) {
                //如果不是一个文件(或者是个目录/不存在)
                System.out.println("您当前输入的源文件的路径有误!");
                return;
            }

            File destFile = new File(destPath);
            if (destFile.isFile()) {
                //如果该文件已经存在,也不能进行拷贝
                System.out.println("您输入的目标路径有误");
                return;
            }

            //完成拷贝操作
            try (InputStream inputStream = new FileInputStream(srcFile);
                 OutputStream outputStream = new FileOutputStream(destFile)) {
                byte[] buffer = new byte[1024];
                while (true) {
                    int b = inputStream.read(buffer);
                    if (b == -1) {
                        break;
                    }
                    outputStream.write(buffer);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

..........................................................................................................................................................

从网址中复制图片，选择图片：

网址：

小黄鸡表情包 - 高清图片，堆糖，美图壁纸兴趣社区

复制到此文件夹中

代码如下：

import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class Copy {
    public static void main(String[] args) {
        InputStream inputStream = null;
        FileOutputStream outputStream = null;
        try {         //输入要复印的网址
            URL url = new URL("https://c-ssl.dtstatic.com/uploads/item/202004/09/20200409235851_xwrjt.thumb.1000_0.jpg");
            URLConnection urlConnection = url.openConnection();
            inputStream = urlConnection.getInputStream();
            File file = new File("G:/Program/xxx/kkkk.jpg");   //输入要复印到的目标地址
            outputStream = new FileOutputStream(file);
            byte[] buffer = new byte[1024];
            int length = 0;
            while ((length = inputStream.read(buffer)) != -1){
                outputStream.write(buffer,0,length);
            }
        }catch (IOException e){
            throw new RuntimeException(e);
        }finally {
            try {
                outputStream.close();
            }catch (IOException e){
                throw new RuntimeException(e);
            }try {
                inputStream.close();
            }catch (IOException e){
                throw new RuntimeException(e);
            }
        }
    }
}

运行效果如图：