注意：以下上传和下载方法未必完全正确，不同浏览器效果不同，建议不要使用IE
/**
* 简单的文件上传
* @author:qiuchen
* @createTime:2012-6-19
* @param request
* @param response
* @param errors
* @return
* @throws Exception
*/
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public ModelAndView onSubmit(HttpServletRequest request,HttpServletResponse response, BindException errors) throws Exception {
//上传文件处理器
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
//文件对象
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("file");
//从表单域中获取文件对象的详细,如：文件名称等等
String name = multipartRequest.getParameter("name");
System.out.println("name: " + name);
// 获得文件名(全路径)
String realFileName = file.getOriginalFilename();
realFileName = encodeFilename(realFileName,request);
System.out.println("获得文件名：" + realFileName);
// 获取当前web服务器项目路径
String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "fileupload/";
// 创建文件夹
File dirPath = new File(ctxPath);
if (!dirPath.exists()) {
dirPath.mkdir();
}
//创建文件
File uploadFile = new File(ctxPath + realFileName);
//Copy文件
FileCopyUtils.copy(file.getBytes(), uploadFile);
return new ModelAndView("success");
}
/**
* 批量上传文件
* @author:qiuchen
* @createTime:2012-6-19
* @param request
* @param response
* @param errors
* @return
* @throws Exception
*/
@RequestMapping(value = "/upload2", method = RequestMethod.POST)
public ModelAndView onSubmit2(HttpServletRequest request,HttpServletResponse response, BindException errors) throws Exception {
//文件处理器
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
//文件列表
Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
//获取服务器上传文件夹地址
String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "fileupload\\";
//创建文件夹
File file = new File(ctxPath);
if (!file.exists()) {
file.mkdir();
}
String fileName = null;
for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {
//单个文件
MultipartFile mf = entity.getValue();
//文件名
fileName = mf.getOriginalFilename();
//创建文件
File uploadFile = new File(ctxPath + fileName);
//copy从内存中复制到磁盘上
FileCopyUtils.copy(mf.getBytes(), uploadFile);
}
return new ModelAndView("success");
}
/**
* 设置下载文件中文件的名称
* @param filename
* @param request
* @return
*/
public static String encodeFilename(String filename,HttpServletRequest request) {
/**
* 获取客户端浏览器和操作系统信息 在IE浏览器中得到的是：User-Agent=Mozilla/4.0 (compatible; MSIE
* 6.0; Windows NT 5.1; SV1; Maxthon; Alexa Toolbar)
* 在Firefox中得到的是：User-Agent=Mozilla/5.0 (Windows; U; Windows NT 5.1;
* zh-CN; rv:1.7.10) Gecko/20050717 Firefox/1.0.6
*/
String agent = request.getHeader("USER-AGENT");
try {
if ((agent != null) && (-1 != agent.indexOf("MSIE"))) { // IE浏览器
String newFileName = URLEncoder.encode(filename, "UTF-8");
newFileName = StringUtils.replace(newFileName, "+", "%20");
if (newFileName.length() > 150) {
newFileName = new String(filename.getBytes("GB2312"),
"ISO8859-1");
newFileName = StringUtils.replace(newFileName, " ", "%20");
}
return newFileName;
}
if ((agent != null) && (-1 != agent.indexOf("Mozilla"))) // 火狐浏览器
return MimeUtility.encodeText(filename, "UTF-8", "B");
return filename;
} catch (Exception ex) {
return filename;
}
}
/**
* 文件下载
* @author:qiuchen
* @createTime:2012-6-19
* @param fileName
* @param request
* @param response
* @return
* @throws Exception
*/
@RequestMapping("/download/{fileName}")
public ModelAndView download(@PathVariable("fileName") String fileName,HttpServletRequest request, HttpServletResponse response)throws Exception {
request.setCharacterEncoding("UTF-8");
BufferedInputStream bis = null; //从文件中读取内容
BufferedOutputStream bos = null; //向文件中写入内容
//获得服务器上存放下载资源的地址
String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "fileupload\\";
//获得下载文件全路径
String downLoadPath = ctxPath + fileName;
System.out.println(downLoadPath);
//如果文件不存在,退出
File file = new File(downLoadPath);
if(!file.exists()){
return null;
}
try {
//获得文件大小
long fileLength = new File(downLoadPath).length();
System.out.println(new String(fileName.getBytes("utf-8"), "ISO-8859-1"));
response.setContentType("text/html;charset=utf-8"); //设置相应类型和编码
response.setHeader("Content-disposition", "attachment;filename=" + new String(fileName.getBytes("utf-8"), "ISO-8859-1"));
response.setHeader("Content-Length", String.valueOf(fileLength));
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
//定义文件读取缓冲区
byte[] buff = new byte[2048];
int bytesRead;
//把下载资源写入到输出流
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (bis != null)
bis.close();
if (bos != null)
bos.close();
}
return null;
}
对于正在复制代码的你，Control+O导入命名包时，以下应该是你喜欢的：
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.BindException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import org.springframework.web.servlet.ModelAndView;
import com.sun.xml.internal.messaging.saaj.packaging.mime.internet.MimeUtility;