cn.afterturn.easypoi.cache.ImageCache Maven / Gradle / Ivy
/**
* Copyright 2013-2015 JueYue ([email protected])
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cn.afterturn.easypoi.cache;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import javax.imageio.ImageIO;
import org.apache.poi.util.IOUtils;
import cn.afterturn.easypoi.cache.manager.POICacheManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 图片缓存处理
*
* @author JueYue
* 2016年1月8日 下午4:16:32
*/
public class ImageCache {
private static final Logger LOGGER = LoggerFactory
.getLogger(ImageCache.class);
public static byte[] getImage(String imagePath) {
InputStream is = POICacheManager.getFile(imagePath);
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
try {
BufferedImage bufferImg = ImageIO.read(is);
ImageIO.write(bufferImg,
imagePath.substring(imagePath.lastIndexOf(".") + 1, imagePath.length()),
byteArrayOut);
return byteArrayOut.toByteArray();
} catch (Exception e) {
LOGGER.error(e.getMessage(), e);
return null;
} finally {
IOUtils.closeQuietly(is);
IOUtils.closeQuietly(byteArrayOut);
}
}
}