转自：http://blog.csdn.net/huang_hws/article/details/6689111
当然前提是已经设置好了spring mvc的配置。
上传：
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
下载：
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();
}
}
}