使用SpringMVC框架实现文件上传和下载功能

使用SpringMVC框架实现文件上传和下载功能

 

(一)单个文件上传

①配置文件上传解释器

<!—配置文件上传解释器 -->
<mvc:annotation-driven></mvc:annotation-driven>
<bean name="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"></property>
<property name="maxInMemorySize" value="512000000" ></property>
<property name="maxUploadSize" value="20000000"></property>
</bean>

 

②在Controller层编写映射方法

@RequestMapping(value="upload")
    public String upload(MultipartFile file) throws Exception{
        File destfile = new File("D:/dir/" + file.getOriginalFilename());
         file.transferTo(destfile);
         return "/upload.jsp";
    }

 

注意:spring MVC文件上传功能引用了commons-fileupload组件,实现文件上传功能须要引入commons-fileupload和commons-io包前端

(前端页面很简单,就是一个用来上传文件的input标签,但要注意标签的name属性要和映射方法的参数名对应,如“file”)web

 

 

(二)多文件上传

 
@RequestMapping(value="upload")
public String upload(MultipartFile[] file) throws Exception{
         for (MultipartFile file : files) {
           File destfile = new File("D:/dir/" + file.getOriginalFilename());
           file.transferTo(destfile);
         }
      return "/upload.jsp";
}

 

 

(三)文件下载

 
@RequestMapping(value="/{filename}/download")
public void download(@PathVariable String filename,HttpServletResponse response) throws Exception{
         File file=new File("d:/dir/"+filename);
         FileInputStream input = new FileInputStream(file);
         ServletOutputStream out = response.getOutputStream();
                response.addHeader("Content-Disposition", "attachment;filename="+new String(filename.getBytes(),"ISO-8859-1"));
                IOUtils.cope(input,out);
    }

 

(注:文件下载须要修改应答头信息,将流以附件形式输出,并设置文件名的编码格式为ISO-8859-1)spring

 

 

———————————————————————————————————————————————————————————————————mvc

 

The end   万有引力+
app

 

-框架

 

-jsp

 

-post

 

-编码

 

-spa

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