根据图片地址检查图片格式，今日头条有效

直接看代码

/**
* 判断图片格式，如果不是GIF就返回true
* 	是GIF就返回false
*
* @param imgUrl
* @return
* @throws HttpException
* @throws IOException
* @author XiaoMingHui
* @date 2017-8-21 上午10:36:22
*/
private boolean judgeImgFormat(String imgUrl){
org.apache.commons.httpclient.methods.GetMethod get = new org.apache.commons.httpclient.methods.GetMethod(imgUrl);
try {
new org.apache.commons.httpclient.HttpClient().executeMethod(get);
} catch (HttpException e) {
logger.error("判断图片是否为GIF时出现HttpException，异常的图片地址为：" + imgUrl, e);
} catch (IOException e) {
logger.error("判断图片是否为GIF时出现IOException，异常的图片地址为：" + imgUrl, e);
}

org.apache.commons.httpclient.HeaderElement[] heElements = get.getResponseHeader("Content-Type")
.getElements();

for (HeaderElement hElement : heElements) {
if ("image/gif".equals(hElement.getName())) {
return false;
}
}
return true;
}