1：首先要添加相关得jar文件，在pom.xml中
1 <dependency> 2 <groupId>commons-fileupload</groupId> 3 <artifactId>commons-fileupload</artifactId> 4 <version>1.3</version> 5 </dependency>
2：定义文件解析器
1 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 2 <!-- 设置默认编码 --> 3 <property name="defaultEncoding" value="utf-8"></property> 4 <!-- 上传图片最大大小5M--> 5 <property name="maxUploadSize" value="5242440"></property> 6 </bean>
3：jsp页面
1 <%@ page language="java" contentType="text/html; charset=utf-8" 2 pageEncoding="utf-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 <title>文件下载</title> 8 <style> 9 .down { 10 text-align:center; 11 font-size:150px; 12 } 13 </style> 14 </head> 15 <body> 16 <div class="down"> 17 <a href="${pageContext.request.contextPath }/testDownload">前往下载</a><br/> 18 </div> 19 </body> 20 </html>
4：Controller层
1 @RequestMapping(value="/testDownload", produces="application/vnd.android.package-archive") 2 public ResponseEntity<byte[]> testDownload(HttpServletRequest request,HttpServletResponse resp){ 3 String filename="ymhscn.apk"; 4 ServletContext scontext=request.getServletContext(); 5 String path=scontext.getRealPath("/WEB-INF/"+filename); 6 System.out.println(path); 7 File f=new File(path); 8 InputStream in =null; 9 ResponseEntity<byte[]> response=null ; 10 try { 11 in = new FileInputStream(f); 12 byte[] b=new byte[in.available()]; 13 in.read(b); 14 HttpHeaders headers = new HttpHeaders(); 15 filename = new String(filename.getBytes(),"utf-8"); 16 //MediaType mt = new MediaType("application/vnd.android.package-archive"); 17 //headers.setContentType(mt); 18 //以下的类型必须要设置，要不不能在android机上正常下载的 19 headers.add("Content-Disposition", "attachment;filename="+filename); 20 21 //resp.setContentType("application/vnd.android.package-archive"); 22 HttpStatus statusCode=HttpStatus.OK; 23 response = new ResponseEntity<byte[]>(b, headers, statusCode); 24 25 } catch (FileNotFoundException e) { 26 e.printStackTrace(); 27 } catch (IOException e) { 28 e.printStackTrace(); 29 }finally{ 30 try { 31 in.close(); 32 } catch (IOException e) { 33 e.printStackTrace(); 34 } 35 36 } 37 return response; 38 }
5：注意！！！！springmvc 特定mime类型返回,想要Android默认浏览器下载成功，一定要在这里加这一句
