这里是imageUtil.java
package com.shop.o2o.util;

import java.io.File;
import java.io.IOException;
import java.net.URLDecoder;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

import javax.imageio.ImageIO;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import com.shop.o2o.dto.ImageHolder;

import net.coobird.thumbnailator.Thumbnails;
import net.coobird.thumbnailator.geometry.Positions;

public class ImageUtil {

private static String basePath = Thread.currentThread().getContextClassLoader().getResource("").getPath();
private static final SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");
private static final Random r = new Random();
private static Logger logger = LoggerFactory.getLogger(ImageUtil.class);

/**
 * 将CommonsMultipartFile转换成File类
 * 
 * @param cFile
 * @return
 */
public static File transferCommonsMultipartFileToFile(CommonsMultipartFile cFile) {
	File newFile = new File(cFile.getOriginalFilename());
	try {
		cFile.transferTo(newFile);
	} catch (IllegalStateException e) {
		logger.error(e.toString());
		e.printStackTrace();
	} catch (IOException e) {
		logger.error(e.toString());
		e.printStackTrace();
	}
	return newFile;
}

/**
 * 处理缩略图，并返回新生成图片的相对值路径
 * 
 * @param thumbnail
 * @param targetAddr
 * @return
 */
public static String generateThumbnail(ImageHolder thumbnail, String targetAddr) {
	// 获取不重复的随机名
	String realFileName = getRandomFileName();
	// 获取文件的扩展名如png,jpg等
	String extension = getFileExtension(thumbnail.getImageName());
	// 如果目标路径不存在，则自动创建
	makeDirPath(targetAddr);
	// 获取文件存储的相对路径(带文件名)
	String relativeAddr = targetAddr + realFileName + extension;
	logger.debug("current relativeAddr is :" + relativeAddr);
	// 获取文件要保存到的目标路径
	File dest = new File(PathUtil.getImgBasePath() + relativeAddr);
	logger.debug("current complete addr is :" + PathUtil.getImgBasePath() + relativeAddr);
	logger.debug("basePath is :" + basePath);
	// 调用Thumbnails生成带有水印的图片
	try {
		Thumbnails.of(thumbnail.getImage()).size(200, 200)
				.watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + "/watermark.jpg")), 0.25f)
				.outputQuality(0.8f).toFile(dest);
	} catch (IOException e) {
		logger.error(e.toString());
		throw new RuntimeException("创建缩略图失败：" + e.toString());
	}
	// 返回图片相对路径地址
	return relativeAddr;
}

/**
 * 处理详情图，并返回新生成图片的相对值路径
 * 
 * @param thumbnail
 * @param targetAddr
 * @return
 */
public static String generateNormalImg(ImageHolder thumbnail, String targetAddr) {
	// 获取不重复的随机名
	String realFileName = getRandomFileName();
	// 获取文件的扩展名如png,jpg等
	String extension = getFileExtension(thumbnail.getImageName());
	// 如果目标路径不存在，则自动创建
	makeDirPath(targetAddr);
	// 获取文件存储的相对路径(带文件名)
	String relativeAddr = targetAddr + realFileName + extension;
	logger.debug("current relativeAddr is :" + relativeAddr);
	// 获取文件要保存到的目标路径
	File dest = new File(PathUtil.getImgBasePath() + relativeAddr);
	logger.debug("current complete addr is :" + PathUtil.getImgBasePath() + relativeAddr);
	// 调用Thumbnails生成带有水印的图片
	try {
		Thumbnails.of(thumbnail.getImage()).size(337, 640)
				.watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + "/watermark.jpg")), 0.25f)
				.outputQuality(0.9f).toFile(dest);
	} catch (IOException e) {
		logger.error(e.toString());
		throw new RuntimeException("创建缩图片失败：" + e.toString());
	}
	// 返回图片相对路径地址
	return relativeAddr;
}

/**
 * 创建目标路径所涉及到的目录，即/home/work/xiangze/xxx.jpg, 那么 home work xiangze 这三个文件夹都得自动创建
 * 
 * @param targetAddr
 */
private static void makeDirPath(String targetAddr) {
	String realFileParentPath = PathUtil.getImgBasePath() + targetAddr;
	File dirPath = new File(realFileParentPath);
	if (!dirPath.exists()) {
		dirPath.mkdirs();
	}
}

/**
 * 获取输入文件流的扩展名
 * 
 * @param thumbnail
 * @return
 */
private static String getFileExtension(String fileName) {
	return fileName.substring(fileName.lastIndexOf("."));
}

/**
 * 生成随机文件名，当前年月日小时分钟秒钟+五位随机数
 * 
 * @return
 */
public static String getRandomFileName() {
	// 获取随机的五位数
	int rannum = r.nextInt(89999) + 10000;
	String nowTimeStr = sDateFormat.format(new Date());
	return nowTimeStr + rannum;
}

public static void main(String[] args) throws IOException {
	System.out.println(basePath);
	String basePath1 = URLDecoder.decode(basePath, "utf-8");
	System.out.println(basePath1);

// Thumbnails.of(new File(“F:\image\lbj.jpg”)).size(200, 200)
// .watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + “/watermark.jpg”)), 0.25f)
// .outputQuality(0.8f).toFile(“F:\image\lbjnew.jpg”);
}

/**
 * storePath是文件的路径还是目录的路径， 如果storePath是文件路径则删除该文件， 如果storePath是目录路径则删除该目录下的所有文件
 * 
 * @param storePath
 */
public static void deleteFileOrPath(String storePath) {
	File fileOrPath = new File(PathUtil.getImgBasePath() + storePath);
	if (fileOrPath.exists()) {
		if (fileOrPath.isDirectory()) {
			File files[] = fileOrPath.listFiles();
			for (int i = 0; i < files.length; i++) {
				files[i].delete();
			}
		}
		fileOrPath.delete();
	}
}

}

这里是pathUtil.java
package com.shop.o2o.util;

public class PathUtil {
	// 获取分隔符
	private static String separator = System.getProperty("file.separator");

	/**
	 * 图片保存的根目录
	 * 
	 * @return
	 */
	public static String getImgBasePath() {
		// 获取操作系统
		String os = System.getProperty("os.name");
		String basePath = "";
		if (os.toLowerCase().startsWith("win")) {
			// /download/image/
			basePath = "F:\\image";
		} else {
			basePath = "/home/user/image";
		}
		// 将斜杆替换成分隔符，这样就能保证路径是有效的
		basePath = basePath.replace("/", separator);
		return basePath;
	}

	/**
	 * 图片保存的子目录：</br>
	 * upload/item/shop/" + shopId
	 * 
	 * @param shopId
	 * @return
	 */
	public static String getShopImagePath(long shopId) {
		// /upload/item/shop/"+shopId+"/
		String imagePath = "upload/item/shop/" + shopId + "/";
		return imagePath.replace("/", separator);
	}

}
![图片描述](http://img.mukewang.com/szimg/5c8b310c0001f32a16880830.jpg)
![图片描述](http://img.mukewang.com/szimg/5c8b311a0001714017730984.jpg)
![图片描述](http://img.mukewang.com/szimg/5c8b31280001fd1d16440567.jpg)