SpringMVC 文件上传

package cn.happy.Controller;

import java.io.File;


import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class MyController {
    @RequestMapping(value="/first.do")
    public String doFirst(HttpSession session,MultipartFile uploadfile ) throws Exception{
        if (uploadfile.getSize()>0) {
            //获取前半部分路径
            String leftpath=session.getServletContext().getRealPath("/images");
            //获取文件名称
            String filename = uploadfile.getOriginalFilename();
            //限制文件类型
            if(filename.endsWith(".jpg")||filename.endsWith(".JPG")){
                    File file=new File(leftpath,filename);
                    uploadfile.transferTo(file);
        
            
            return "WELCOME.jsp";
        }
        }
        
        return "error.jsp";
    }

 <!-- 配置包扫描器-->
       <context:component-scan base-package="cn.happy.Controller"></context:component-scan>
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>


<mvc:annotation-driven/>