1ページにenctype = "multipart / form-data" 属性
<form action="sendMessage" method="post" class="wrap" enctype="multipart/form-data">
<input id="attachment" type="file" name="attachment">
</form>
図2に示すように、制御層
public void sendMessage(MultipartHttpServletRequest request) throws Exception {
// 获取附件
MultipartFile attachment = request.getFile("attachment");
//文件名
String originalFilename = attachment.getOriginalFilename();
//具体业务省略........
}
3、ツール
/**
* 工具类
* @param req
* @param file 文件流
* @param originalFilename 上传文件名称
* @return
* @throws IOException
*/
private String writeFile(HttpServletRequest req,byte[] file, String originalFilename) throws IOException {
// 获取文件上传要保存到的文件地址
String path = req.getSession().getServletContext().getRealPath("/upload");
//D:\ssgxWorkSpase\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\SMS\upload
System.out.println(path);
// 如果文件夹不存在则创建该文件夹
File uploadDir = new File(path);
if (!uploadDir.exists()){
uploadDir.mkdirs();
}
FileOutputStream out = new FileOutputStream(path+originalFilename);
out.write(file);
out.flush();
out.close();
// 文件上传后的访问路径
//http://localhost:8080/SMS
String basePath = req.getRequestURL().substring(0,req.getRequestURL().lastIndexOf("/"));
System.out.println(basePath);
return basePath + "/upload/" + originalFilename;
}