<!-- 图片缩略图 --><dependency><groupId>net.coobird</groupId><artifactId>thumbnailator</artifactId><version>0.4.8</version></dependency>

        //按指定大小把图片进行缩和放（会遵循原图高宽比例） //此处把图片压成400×500的缩略图Thumbnails.of(fromPic).size(400,500).toFile(toPic);//变为400*300,遵循原图比例缩或放到400*某个高度

        //按照比例进行缩小和放大Thumbnails.of(fromPic).scale(0.2f).toFile(toPic);//按比例缩小Thumbnails.of(fromPic).scale(2f);//按比例放大

        //图片尺寸不变，压缩图片文件大小outputQuality实现,参数1为最高质量Thumbnails.of(fromPic).scale(1f).outputQuality(0.25f).toFile(toPic);

/*** * @Description:保存图片并且生成缩略图* @param imageFile 图片文件* @param request 请求对象* @param uploadPath 上传目录* @return*/public static BaseResult uploadFileAndCreateThumbnail(MultipartFile imageFile,HttpServletRequest request,String uploadPath) {if(imageFile == null ){return new BaseResult(false, "imageFile不能为空");}if (imageFile.getSize() >= 10*1024*1024){return new BaseResult(false, "文件不能大于10M");}String uuid = UUID.randomUUID().toString();String fileDirectory = CommonDateUtils.date2string(new Date(), CommonDateUtils.YYYY_MM_DD);//拼接后台文件名称String pathName = fileDirectory + File.separator + uuid + "."+ FilenameUtils.getExtension(imageFile.getOriginalFilename());//构建保存文件路劲//2016-5-6 yangkang 修改上传路径为服务器上 String realPath = request.getServletContext().getRealPath("uploadPath");//获取服务器绝对路径 linux 服务器地址  获取当前使用的配置文件配置//String urlString=PropertiesUtil.getInstance().getSysPro("uploadPath");//拼接文件路劲String filePathName = realPath + File.separator + pathName;log.info("图片上传路径："+filePathName);//判断文件保存是否存在File file = new File(filePathName);if (file.getParentFile() != null || !file.getParentFile().isDirectory()) {//创建文件
            file.getParentFile().mkdirs();}InputStream inputStream = null;FileOutputStream fileOutputStream = null;try {inputStream = imageFile.getInputStream();fileOutputStream = new FileOutputStream(file);//写出文件//2016-05-12 yangkang 改为增加缓存
//            IOUtils.copy(inputStream, fileOutputStream);byte[] buffer = new byte[2048];IOUtils.copyLarge(inputStream, fileOutputStream, buffer);buffer = null;} catch (IOException e) {filePathName = null;return new BaseResult(false, "操作失败", e.getMessage());} finally {try {if (inputStream != null) {inputStream.close();}if (fileOutputStream != null) {fileOutputStream.flush();fileOutputStream.close();}} catch (IOException e) {filePathName = null;return new BaseResult(false, "操作失败", e.getMessage());} }//        String fileId = FastDFSClient.uploadFile(file, filePathName);/*** 缩略图begin*///拼接后台文件名称String thumbnailPathName = fileDirectory + File.separator + uuid + "small."+ FilenameUtils.getExtension(imageFile.getOriginalFilename());//added by yangkang 2016-3-30 去掉后缀中包含的.png字符串 if(thumbnailPathName.contains(".png")){thumbnailPathName = thumbnailPathName.replace(".png", ".jpg");}long size = imageFile.getSize();double scale = 1.0d ;if(size >= 200*1024){if(size > 0){scale = (200*1024f) / size  ;}}//拼接文件路劲String thumbnailFilePathName = realPath + File.separator + thumbnailPathName;try {//added by chenshun 2016-3-22 注释掉之前长宽的方式，改用大小
//            Thumbnails.of(filePathName).size(width, height).toFile(thumbnailFilePathName);if(size < 200*1024){Thumbnails.of(filePathName).scale(1f).outputFormat("jpg").toFile(thumbnailFilePathName);}else{Thumbnails.of(filePathName).scale(1f).outputQuality(scale).outputFormat("jpg").toFile(thumbnailFilePathName);}} catch (Exception e1) {return new BaseResult(false, "操作失败", e1.getMessage());}/*** 缩略图end*/Map<String, Object> map = new HashMap<String, Object>();//原图地址map.put("originalUrl", pathName);//缩略图地址map.put("thumbnailUrl", thumbnailPathName);return new BaseResult(true, "操作成功", map);}

  /*** 根据key从gzt.properties配置文件获取配置信息  * @param key 键值* @return*/public String getSysPro(String key){return getSysPro(key, null);}/*** 根据key从gzt.properties配置文件获取配置信息  * @param key 键值* @param defaultValue 默认值* @return*/public String getSysPro(String key,String defaultValue){return getValue("spring/imageserver-"+System.getProperty("spring.profiles.active")+".properties", key, defaultValue);}

        //获取服务器绝对路径 linux 服务器地址   String urlString=PropertiesUtil.getInstance().getSysPro("uploadPath");

package com.xyz.imageserver.common.properties;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;/*** * @ClassName PropertiesUtil.java * @Description 系统配置工具类* @author caijy* @date 2015年6月9日 上午10:50:38* @version 1.0.0*/
public class PropertiesUtil {private Logger logger = LoggerFactory.getLogger(PropertiesUtil.class);private ConcurrentHashMap<String, Properties> proMap;private PropertiesUtil() {proMap = new ConcurrentHashMap<String, Properties>();}private static PropertiesUtil instance = new PropertiesUtil();/*** 获取单例对象* @return*/public static PropertiesUtil getInstance(){return instance;}/*** 根据key从gzt.properties配置文件获取配置信息  * @param key 键值* @return*/public String getSysPro(String key){return getSysPro(key, null);}/*** 根据key从gzt.properties配置文件获取配置信息  * @param key 键值* @param defaultValue 默认值* @return*/public String getSysPro(String key,String defaultValue){return getValue("spring/imageserver-"+System.getProperty("spring.profiles.active")+".properties", key, defaultValue);}/*** 从配置文件中获取对应key值* @param fileName 配置文件名* @param key   key值* @param defaultValue 默认值* @return*/public String getValue(String fileName,String key,String defaultValue){String val = null;Properties properties = proMap.get(fileName);if(properties == null){InputStream inputStream = PropertiesUtil.class.getClassLoader().getResourceAsStream(fileName);try {properties = new Properties();properties.load(new InputStreamReader(inputStream,"UTF-8"));proMap.put(fileName, properties);val = properties.getProperty(key,defaultValue);} catch (IOException e) {logger.error("getValue",e);}finally{try {if (inputStream != null) {                        inputStream.close();}} catch (IOException e1) {logger.error(e1.toString());}}}else{val = properties.getProperty(key,defaultValue);}return val;}
}