一.SpringMVC文件的上传
1.1.需要导入两个jar包
1.2在SpringMVC配置文件中加入
<!-- upload settings --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="102400000"> <property name="defaultEncoding" value="utf-8"> </property> </bean>
注意:bean的id必须有而且必须叫multipartResolver
1.3方法代码
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | @RequestMapping (value= "/upload" ,method=RequestMethod.POST) public String upload(HttpServletRequest req) throws Exception{ MultipartHttpServletRequest mreq = (MultipartHttpServletRequest)req; MultipartFile file = mreq.getFile( "file" ); String fileName = file.getOriginalFilename(); SimpleDateFormat sdf = new SimpleDateFormat( "yyyyMMddHHmmss" ); FileOutputStream fos = new FileOutputStream(req.getSession().getServletContext().getRealPath( "/" )+ "upload/" +sdf.format( new Date())+fileName.substring(fileName.lastIndexOf( '.' ))); fos.write(file.getBytes()); fos.flush(); fos.close(); return "hello" ; } |
二. SpringMVC文件的下载.
2.1 准备下载源
在WebContent下新建files目录,放入aaa.txt,作为下载源
2.2 在index.jsp添加超链接作为下载入口
<a href="testResponseEntity" id="testJson">testResponseEntity</a><br/>
2.3 在handler SpringMVCTest中添加接口
@RequestMapping("testResponseEntity") public ResponseEntity<byte[]> testResponseEntity(HttpSession session) throws IOException{ byte[] body = null; ServletContext servletContext = session.getServletContext(); InputStream in = servletContext.getResourceAsStream("/files/aaa.txt"); body = new byte[in.available()]; in.read(body); HttpHeaders headers = new HttpHeaders(); headers.add("Content-Disposition", "attachment;filename=aaa.txt"); HttpStatus statusCode = HttpStatus.OK; ResponseEntity<byte[]> response = new ResponseEntity<>(body, headers, statusCode); return response; }
由于我注册帅哥发现被人已经注册过,所以就注册个帅哥的爸爸也不错.帅哥毕竟是我生的.哈哈哈
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