java通过url读取网络图片

最新推荐文章于 2024-07-13 03:15:58 发布

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#url #java #网络 #buffer #string #byte

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本文提供了一个使用Java实现的下载图片并保存到本地文件系统的示例代码，包括了URL解析、网络请求、缓冲输入流和文件输出流等关键步骤。

import java.io.BufferedInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;

 public class downimage {

 public void saveToFile(String destUrl) {
 FileOutputStream fos = null;
 BufferedInputStream bis = null;
 HttpURLConnection httpUrl = null;
 URL url = null;
 int BUFFER_SIZE = 1024;
 byte[] buf = new byte[BUFFER_SIZE];
 int size = 0;
 try {
 url = new URL(destUrl);
 httpUrl = (HttpURLConnection) url.openConnection();
 httpUrl.connect();
 bis = new BufferedInputStream(httpUrl.getInputStream());
 fos = new FileOutputStream("c:\\haha.gif");
 while ((size = bis.read(buf)) != -1) {
 fos.write(buf, 0, size);
 }
 fos.flush();
 } catch (IOException e) {
 } catch (ClassCastException e) {
 } finally {
 try {
 fos.close();
 bis.close();
 httpUrl.disconnect();
 } catch (IOException e) {
 } catch (NullPointerException e) {
 }
 }
 }
 public static void main(String[] args) {
 // TODO Auto-generated method stub

 downimage dw=new downimage();
 dw.saveToFile("http://10.81.36.193:8081/png.png");
 }
 }