package com.gxhj.safecommunity.gat1400.utils;
import com.gxhj.core.exception.BusinessException;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
public class ImageUtils {
/**
* 通过url获取图片宽和高
* @param picUrl
* @return
*/
public static Map<String, Integer> getPictureHeightAndWidthMap(String picUrl) {
Map<String, Integer> map = new HashMap();
try {
URL url = new URL(picUrl);
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
DataInputStream in = new DataInputStream(
connection.getInputStream());
BufferedImage image = ImageIO.read(in);
map.put("w", image.getWidth());
map.put("h", image.getHeight());
connection.disconnect();
in.close();
} catch (IOException e) {
throw new BusinessException("图片IO流获取出现异常:"+e);
}
return map;
}
/**
* 根据url获取图片格式
* @param picUrl
* @return
*/
public static String getImageType(String picUrl) {
String headerField = null;
try {
URL url = new URL(picUrl);
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
headerField = connection.getHeaderField("Content-Type");
connection.disconnect();
} catch (IOException e) {
throw new BusinessException("图片IO流获取出现异常:"+e);
}
return headerField;
}
}
1.从图片url获取信息
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