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前台： <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>hello</title> </head> <body> <div> <form enctype=‘multipart/form-data‘ method="post" action="upload.do"> <input type="file" name="uploadFile" /> <button>提交</button> </form> </div> </body> </html> 调用后台的upload.do的请求 spring mvc 只需在请求前注解@RequstMapping("your request name")便可对应 后台： package hope.cs.zhku.controller; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; /****************************************************************************** * 名称：UserBasicEditorController.java</br> * 日期：2011-8-15</br> * 功能：</br> * 编写：Willson Huang</br> * 复核：</br> * 其他：</br> * 历史:(说明,修改人,时间)</br> * 1.create ,Willson Huang ,2011-8-15 *****************************************************************************/ @Controller public class UploadController { @RequestMapping("upload.do") public String upload(HttpServletRequest request,HttpServletResponse response ){ MultipartHttpServletRequest multipartHttpservletRequest=(MultipartHttpServletRequest) request; MultipartFile multipartFile = multipartHttpservletRequest.getFile("uploadFile"); String originalFileName=multipartFile.getOriginalFilename(); File file=new File("file"); if(!file.exists()){ file.mkdir(); } System.out.println(file.getAbsolutePath()); try { FileOutputStream fileOutputStream=new FileOutputStream(file+"/uploadFile"+originalFileName.substring(originalFileName.lastIndexOf(‘.‘), originalFileName.length())); fileOutputStream.write(multipartFile.getBytes()); fileOutputStream.flush(); fileOutputStream.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); return "error"; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return "error"; } return "uploadSuccess"; } } 此时，配置文件如前一遍文章的配置所示，此处不再列出，控制器中有一句输出语句，输出文件储存的位置，可自行更改 复制代码 下载： 复制代码 前台： <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <script type="text/javascript" src="js/jquery-1.4.4.min.js"></script> <title>Insert title here</title> </head> <body> <input id=‘fileName‘ type="text" name="fileName"/> <a href="download.do" target="blank"><button>下载</button></a> </body> <script type="text/javascript"> $(function(){ $(‘a‘).click(function(){ var link=this.href+‘?‘+‘fileName=‘+$(‘#fileName‘).val(); window.open(link); return false; }); }); </script> </html> 后台： 前台填写要下载的文件，后台从文件夹里查找，如果没有文件则返回错误文件，否则则提供任意文件类型的下载（填写文件时必须写后缀） package hope.cs.zhku.controller; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; /****************************************************************************** * 名称：UserBasicEditorController.java</br> * 日期：2011-8-15</br> * 功能：</br> * 编写：Willson Huang</br> * 复核：</br> * 其他：</br> * 历史:(说明,修改人,时间)</br> * 1.create ,Willson Huang ,2011-8-15 *****************************************************************************/ @Controller public class DownloadController { @RequestMapping("download.do") public void downloadFile(String fileName,HttpServletResponse response){ response.setCharacterEncoding("utf-8"); response.setContentType("multipart/form-data"); response.setHeader("Content-Disposition", "attachment;fileName="+fileName); try { File file=new File(fileName); System.out.println(file.getAbsolutePath()); InputStream inputStream=new FileInputStream("file/"+file); OutputStream os=response.getOutputStream(); byte[] b=new byte[1024]; int length; while((length=inputStream.read(b))>0){ os.write(b,0,length); } inputStream.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } 复制代码
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原文地址：http://www.cnblogs.com/cuitrek/p/4923895.html
