springmvc.xml

	<!-- 上传图片配置实现类 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 
		<!-- 上传图片的大小 B 5M 1*1024*1024*5  -->
		<property name="maxUploadSize" value="5000000"/> 
	</bean>

controller 

	/**
	 * 上传图片
	 * 
	 * @param file
	 * @param car
	 * @param request
	 * @return
	 * @throws IllegalStateException
	 * @throws IOException
	 */
	@RequestMapping("/uploadDrivingLicensePath")
	@ResponseBody
	public JsonData uploadDrivingLicensePath(MultipartFile file, Carinfo car, HttpServletRequest request)
			throws IllegalStateException, IOException {
		// 保存图片到
		String filePath = UpLoadUtil.saveFile(file, request.getSession().getServletContext().getRealPath("/"));
		car.setDrivinglicensepath(filePath);
		// 修改
		int count = carService.updateCar(car);
		return count > 0 ? JsonData.success() : JsonData.fail("修改失败!");
	}

上传图片工具类 ，使用uuid作为唯一标识符

package com.ndt.util;

import java.io.File;
import java.io.IOException;
import java.util.UUID;

import org.apache.commons.io.FilenameUtils;
import org.springframework.web.multipart.MultipartFile;

public class UpLoadUtil {
	/**
	 * 上传图片工具类
	 * 
	 * @param file
	 * @param path
	 * @return
	 * @throws IllegalStateException
	 * @throws IOException
	 */
	public static String saveFile(MultipartFile file, String path) throws IllegalStateException, IOException {
		// 保存图片到
		String name = UUID.randomUUID().toString().replaceAll("-", "");
		// jpg
		String ext = FilenameUtils.getExtension(file.getOriginalFilename());
		// 判断有没有当前文件夹
		File f = new File(path + "upload/");
		if (!f.exists()) {
			f.mkdirs();
		}
		file.transferTo(new File(path + "upload/" + name + "." + ext));

		return "/upload/" + name + "." + ext;
	}
}