Java实现下载网络图片

代码如下：

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

public class PictureDownload {
	public static void main(String[] args) {
		String url = "http://image.baidu.com/search/detail?ct=503316480&z=undefined&tn=baiduimagedetail&ipn=d&word=%E5%9B%BE%E7%89%87&step_word=&ie=utf-8&in=&cl=2&lm=-1&st=undefined&hd=undefined&latest=undefined©right=undefined&cs=2350302849,3323337377&os=4242248080,593001332&simid=3454316350,353014060&pn=2&rn=1&di=216700&ln=1227&fr=&fmq=1573637590226_R&fm=&ic=undefined&s=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&is=0,0&istype=0&ist=&jit=&bdtype=0&spn=0&pi=0&gsm=0&objurl=http%3A%2F%2Fb-ssl.duitang.com%2Fuploads%2Fblog%2F201312%2F04%2F20131204184148_hhXUT.jpeg&rpstart=0&rpnum=0&adpicid=0&force=undefined";
        downloadPicture(url);
    }
    //链接url下载图片
    private static void downloadPicture(String urlList) {
        URL url = null;
        int imageNumber = 0;

        try {
            url = new URL(urlList);
            DataInputStream dataInputStream = new DataInputStream(url.openStream());

            String imageName =  "E:/1.jpg";

            FileOutputStream fileOutputStream = new FileOutputStream(new File(imageName));
            ByteArrayOutputStream output = new ByteArrayOutputStream();

            byte[] buffer = new byte[1024];
            int length;

            while ((length = dataInputStream.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }
            byte[] context=output.toByteArray();
            fileOutputStream.write(output.toByteArray());
            dataInputStream.close();
            fileOutputStream.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}