SpringMVC上传文件，批量上传文件

秒速五厘米 2023-06-19 11:30 22阅读 0赞

一：导入相关Jar包

commons-fileupload.jar

commons-io.jar

二：配置web.xml。上载解析器

<bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
          
        <property name="defaultEncoding" value="utf-8"></property> 
          
        <property name="maxUploadSize" value="10485760000"></property>
          
        <property name="maxInMemorySize" value="40960"></property>  
    </bean>

三：web页面

四：controller类 @RequestParam("file") 这个注解必须有

/**
    * spring mvc封装了上传文件  将其封装为一个file对象
    * */
    @RequestMapping("/upload.do")
    public String upload(@RequestParam("file") CommonsMultipartFile file,HttpServletRequest req){
        //获取上传位置
        String path=req.getRealPath("/upload");
        //获取文件名
        String filename=file.getOriginalFilename();
        try {
            InputStream is = file.getInputStream();
            OutputStream os = new FileOutputStream(new File(path,filename));
            int len=0;
            byte[] buffer = new byte[400];
            while((len=is.read(buffer))!=-1){
                os.write(buffer, 0, len);
            }
            os.close();
            is.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "redirect:index.jsp";
    }

五：批量上传web页面

六：批量上传controller类

@RequestMapping("/batch.do")
    public String batch(@RequestParam("file") CommonsMultipartFile file[],HttpServletRequest req){
        //获取上传位置
        String path=req.getRealPath("/upload");
        for(int i=0;i<file.length;i++){
            //获取文件名
            String filename=file[i].getOriginalFilename();
            try {
                InputStream is = file[i].getInputStream();
               OutputStream os = new FileOutputStream(new File(path,filename));
               int len=0;
               byte[] buffer = new byte[400];
               while((len=is.read(buffer))!=-1){
                   os.write(buffer, 0, len);
               }
               os.close();
               is.close();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return "redirect:index.jsp";
    }