Java取网络图片并缩小
Java取网络图片并缩小
Java取网络图片并缩小:
- package action;
- import java.awt.image.BufferedImage;
- import java.io.DataInputStream;
- import java.io.FileOutputStream;
- import java.net.HttpURLConnection;
- import java.net.URL;
- import com.sun.image.codec.jpeg.JPEGCodec;
- import com.sun.image.codec.jpeg.JPEGImageEncoder;
- public class Getpic {
- public Getpic() {
- }
- public static boolean saveUrlAs(String fileUrl, String savePath)/* fileUrl网络资源地址 */
- {
- try {
- /* 将网络资源地址传给,即赋值给url */
- URL url = new URL(fileUrl);
- /* 此为联系获得网络资源的固定格式用法,以便后面的in变量获得url截取网络资源的输入流 */
- HttpURLConnection connection = (HttpURLConnection) url.openConnection();
- DataInputStream in = new DataInputStream(connection.getInputStream());
- BufferedImage src = javax.imageio.ImageIO.read(in);
- int width = src.getWidth();
- int height = src.getHeight();
- // 边长缩小为二分之一
- BufferedImage tag = new BufferedImage(width / 2, height / 2, BufferedImage.TYPE_INT_RGB);
- // 绘制缩小后的图
- tag.getGraphics().drawImage(src, 0, 0, width / 2, height / 2, null);
- FileOutputStream out1 = new FileOutputStream(savePath);
- JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out1);
- encoder.encode(tag);
- out1.close();
- return true;/* 网络资源截取并存储本地成功返回true */
- } catch (Exception e) {
- System.out.println(e + fileUrl + savePath);
- return false;
- }
- }
- public static void main(String[] args) {
- Getpic pic = new Getpic();/* 创建实例 */
- //需要下载的URL
- String photoUrl = "http://hiphotos.baidu.com/yanshennan/pic/item/03a505c8bcbaf6557f3e6f8a.jpg";
- // 截取最后/后的字符串
- String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));
- //图片保存路径
- String filePath = "E:";
- /* 调用函数,并且进行传参 */
- boolean flag = pic.saveUrlAs(photoUrl, filePath + fileName);
- System.out.println("Run ok!\n Get URL file " + flag);
- System.out.println(filePath);
- System.out.println(fileName);
- }
- }
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