此過程要匯入commons-io-2.6資料包用於接收圖片
package 執行緒;
import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
import java.net.URL;
//練習Theard，實現多執行緒同步下載
public class TestThread2 implements Runnable{
    private String url;//網路圖片地址
    private String name;//儲存檔名

    public TestThread2(String url,String name) {
        this.name = name;
        this.url = url;
    }

    @Override
    public void run() {
        WebDownloader webdownloader=new WebDownloader();
        webdownloader.downloader(url,name);
        System.out.println("下載檔名;"+name);
    }
    //下載圖片執行緒的執行體
    public static void main(String[] args) {
        TestThread2 testThread1=new TestThread2("https://pic.cnblogs.com/avatar/2665954/20211202224408.png","1.jpg");
        TestThread2 testThread2=new TestThread2("https://ucc.alicdn.com/pic/developer-ecology/95e2e220445d4496a7002804b858587e.png","2.jpg");
        TestThread2 testThread3=new TestThread2("https://files.cnblogs.com/files/sheng-jie/MVP_Logo.bmp","3.jpg");
            //使用Thread代理呼叫執行緒
        new Thread(testThread1).start();
        new Thread(testThread2).start();
        new Thread(testThread3).start();
        //誰先下載完成，就是先執行
    }
}
//下載器
class WebDownloader{
    //下載方法
    public void downloader(String url,String name){
        try {

                //將路徑轉換成圖片檔案

           FileUtils.copyURLToFile(new URL(url),new File (name));
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("io異常，downloader方法出現問題");
        }
    }
}