public void download() {
InputStream in = null;
CloseableHttpResponse res = null;
while (true) {
try {
Center center = p.next();
File file = new File(path + "\\" + center.getX() + "_" + center.getY() + ".png");
file.createNewFile();
HttpGet get = new HttpGet(centerToURL(center));
System.out.println(get.getURI().toString());
res = client.execute(get);
in = res.getEntity().getContent();
BufferedImage image = ImageIO.read(in);
WriteImage(image, file);
} catch (Exception e) {
e.printStackTrace();
break;
} finally {
try {
in.close();
res.close();
} catch (Exception e) {
e.printStackTrace();
}
}
try {
savePictureInfo();
} catch (Exception e) {
e.printStackTrace();
}
}
}
public Download(Center c1, Center c2) throws TooManyPictureException, IOException {
p = new CenterProviter(c1, c2);
this.mapInfo = new MapInfo(c1, c2);
System.out.println("Hello");
System.out.println(c2.getLat() + " " + c2.getLon());
System.out.println(mapInfo);
int pictureNumber = p.getMaxX() * p.getMaxY();
if (pictureNumber > 150) {
throw new TooManyPictureException("要下载" + pictureNumber + "个图片 这图片太多了");
}
client = HttpClients.createDefault();
}
/**
* 将一个Center转化为URL
*
* <p>为了去除谷歌的水印 在获取图片的时候 请求的每张图片的HEIGHT将比设定的多60个像素
*
* @param c
* @return
*/
public static String centerToURL(Center c) {
return baseURL
+ c.toString()
+ "&zoom="
+ Parameters.ZOOM
+ "&maptype=satellite"
+ "&size="
+ Parameters.WIDTH
+ "x"
+ (Parameters.HEIGHT + 60);
}
