java - JAVA Swing 中的谷歌地图

Question

这是我的代码。没有编译错误，但我没有得到所需的输出: map 没有出现。我想在我的 JPanel 中打开 Google 静态 map ，还想将它保存在我的本地驱动器上。这是我正在使用的代码。请指导我哪里出错了。

try {
    String imageUrl =
            "http://maps.google.com/staticmap?center=40,26&zoom=1&size=150x112&maptype=satellite&key=ABQIAAAAgb5KEVTm54vkPcAkU9xOvBR30EG5jFWfUzfYJTWEkWk2p04CHxTGDNV791-cU95kOnweeZ0SsURYSA&format=jpg";
    String destinationFile = "image.jpg";
    str = destinationFile;
    URL url = new URL(imageUrl);
    InputStream is = url.openStream();
    OutputStream os = new FileOutputStream(destinationFile);

    byte[] b = new byte[2048];
    int length;

    while ((length = is.read(b)) != -1) {
        os.write(b, 0, length);
    }

    is.close();
    os.close();
} catch (IOException e) {
    e.printStackTrace();
    System.exit(1);
}
lp2_1.setIcon(new ImageIcon((new ImageIcon("image.jpg")).getImage()
        .getScaledInstance(630, 600, java.awt.Image.SCALE_SMOOTH)));

Answer 1

我刚试过这个，效果非常好:

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Snippet {
    public static void main(String[] args) throws IOException {
        JFrame test = new JFrame("Google Maps");

        try {
            String imageUrl = "http://maps.google.com/staticmap?center=40,26&zoom=1&size=150x112&maptype=satellite&key=ABQIAAAAgb5KEVTm54vkPcAkU9xOvBR30EG5jFWfUzfYJTWEkWk2p04CHxTGDNV791-cU95kOnweeZ0SsURYSA&format=jpg";
            String destinationFile = "image.jpg";
            String str = destinationFile;
            URL url = new URL(imageUrl);
            InputStream is = url.openStream();
            OutputStream os = new FileOutputStream(destinationFile);

            byte[] b = new byte[2048];
            int length;

            while ((length = is.read(b)) != -1) {
                os.write(b, 0, length);
            }

            is.close();
            os.close();
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }

        test.add(new JLabel(new ImageIcon((new ImageIcon("image.jpg")).getImage().getScaledInstance(630, 600,
                java.awt.Image.SCALE_SMOOTH))));

        test.setVisible(true);
        test.pack();

    }
}

lp2_1 的背后实际上，如果您没有在面板上获取 map ，则可能是此控件有问题。