springmvc上传图片

<bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 设定默认编码 -->
        <property name="defaultEncoding" value="UTF-8"></property>
        <!-- 设定文件上传的最大值5MB，5*1024*1024 -->
        <property name="maxUploadSize" value="5242880"></property>
</bean>

<url-pattern>/</url-pattern>

　　<!-- 资源映射 -->
    <mvc:resources location="/WEB-INF/css/" mapping="/css/**"/>
    <mvc:resources location="/WEB-INF/js/" mapping="/js/**"/>
    <mvc:resources location="/WEB-INF/upload/" mapping="/upload/**"/>

　　@RequestMapping("/pic/upload")
    @ResponseBody
    public String uploadFile(MultipartFile uploadFile, HttpServletRequest request) {
        String path = request.getSession().getServletContext().getRealPath("WEB-INF/upload"); 
        String oldName = uploadFile.getOriginalFilename();
        String newName = IDUtils.genImageName();
        newName = newName + oldName.substring(oldName.lastIndexOf("."));
　　　　 try {
            uploadFile.transferTo(new File(basePath, newName));
        } catch (Exception e) {
　　　　　　  //todo
        }
return "result";
    }

public class IDUtils {

    /**
     * 图片名生成
     */
    public static String genImageName() {
        //取当前时间的长整形值包含毫秒
        long millis = System.currentTimeMillis();
        //long millis = System.nanoTime();
        //加上三位随机数
        Random random = new Random();
        int end3 = random.nextInt(999);
        //如果不足三位前面补0
        String str = millis + String.format("%03d", end3);
        
        return str;
    }
    
    /**
     * 商品id生成
     */
    public static long genItemId() {
        //取当前时间的长整形值包含毫秒
        long millis = System.currentTimeMillis();
        //long millis = System.nanoTime();
        //加上两位随机数
        Random random = new Random();
        int end2 = random.nextInt(99);
        //如果不足两位前面补0
        String str = millis + String.format("%02d", end2);
        long id = new Long(str);
        return id;
    }
    
    public static void main(String[] args) {
        for(int i=0;i< 100;i++)
        System.out.println(genItemId());
    }
}