Java之复制图片-编程知识

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();}}}

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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：