org.jeecgframework.poi.cache.manager.FileLoadeImpl Maven / Gradle / Ivy

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/**
 * 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 org.jeecgframework.poi.cache.manager;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.apache.poi.util.IOUtils;
import org.jeecgframework.poi.util.PoiPublicUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 文件加载类,根据路径加载指定文件
 * @author JueYue
 *  2014年2月10日
 * @version 1.0
 */
public class FileLoadeImpl implements IFileLoader {

    private static final Logger LOGGER = LoggerFactory.getLogger(FileLoadeImpl.class);

    public byte[] getFile(String url) {
        FileInputStream fileis = null;
        ByteArrayOutputStream baos = null;
        try {
            //先用绝对路径查询,再查询相对路径
            try {
                fileis = new FileInputStream(url);
            } catch (FileNotFoundException e) {
                String path = PoiPublicUtil.getWebRootPath(url);
                fileis = new FileInputStream(path);
            }
            baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len;
            while ((len = fileis.read(buffer)) > -1) {
                baos.write(buffer, 0, len);
            }
            baos.flush();
            return baos.toByteArray();
        } catch (FileNotFoundException e) {
            LOGGER.error(e.getMessage(), e);
        } catch (IOException e) {
            LOGGER.error(e.getMessage(), e);
        } finally {
            IOUtils.closeQuietly(fileis);
            IOUtils.closeQuietly(baos);
        }
        LOGGER.error(fileis + "这个路径文件没有找到,请查询");
        return null;
    }

}