SpringMVC下半篇之文件上传

2.文件上传

2.1.添加依赖


<dependency>
    <groupId>commons-fileuploadgroupId>
    <artifactId>commons-fileuploadartifactId>
    <version>1.3.1version>
dependency>

2.2.配置文件上传解析器


<bean id="multipartResolver" 
      class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="5242880" />
    <property name="defaultEncoding" value="UTF-8" />
bean>

2.3.测试

  • 编写controller

    @Controller
    @RequestMapping("/account")
    public class AccountController {
    
        @RequestMapping(path="/upload")
        public String upload(HttpServletRequest request, 
                                 MultipartFile upload,Model model) throws IOException {
            System.out.println("springmvc方式的文件上传");
            //获取要上传的文件目录
            String path = 
                request.getSession().getServletContext().getRealPath("/uploads");
            System.out.println("path:"+path);
            //根据文件上传的目录创建File对象,如果不存在则创建1个File对象
            File file = new File(path);
            if(!file.exists()){
                //创建一个file对象
                file.mkdirs();
            }
            //获取文件上传名称
            String filename = upload.getOriginalFilename();
            //完成文件上传
            upload.transferTo(new File(path,filename));
    
            model.addAttribute("msg", "欢迎你 springmvc");
            return "success";
        }
    }
    
  • 在index.jsp里面定义超链接

        <form action="/account/upload" method="post" enctype="multipart/form-data">
            文件: <input type="file" name="upload">input>
            <input type="submit" value="提交">
        form>
    

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