文件上传使用了apache commons fileupload 和commons IO，
在使用之前，相关jar包需要导入项目工程目录。
uploadForm.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<!DOCTYPE html PUBLIC "-//W3C/DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<title>文件上传</title>
</head>
<body>
<h2>文件上传</h2>
<br>
<form:form action="upload" enctype="multipart/form-data" method="post">
<table>
<tr>
<td><label>用户名: </label></td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td><label>请上传头像: </label></td>
<td><input type="file" name="image"></td>
</tr>
<tr>
<td><input id="submit" type="submit" value="upload"></td>
</tr>
</table>
</form:form>
</body>
</html>FileUploadController.java
package org.fkit.controller;
import java.io.File;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.FileUtils;
import org.fkit.domain.User;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class FileUploadController {
@RequestMapping(value="/upload", method=RequestMethod.POST)
public String upload(HttpServletRequest request,
@ModelAttribute User user,
Model model) throws Exception {
System.out.println(user.getUsername());
if (!user.getImage().isEmpty()) {
//String path = "D:\\tmp\\";
String path = request.getServletContext().getRealPath("/images/");
String filename = user.getImage().getOriginalFilename();
File filepath = new File(path, filename);
if (!filepath.getParentFile().exists()) {
filepath.getParentFile().mkdirs();
}
user.getImage().transferTo(new File(path+File.separator + filename));
model.addAttribute("user", user);
return "success";
} else {
return "error";
}
}
@RequestMapping(value="/download")
public ResponseEntity<byte[]> download(HttpServletRequest request,
@RequestParam("filename") String filename,
Model model) throws Exception{
String path = request.getServletContext().getRealPath("/images/");
File file = new File(path + File.separator + filename);
HttpHeaders headers = new HttpHeaders();
String downloadFileName = new String(filename.getBytes("UTF-8"), "iso-8859-1");
headers.setContentDispositionFormData("attachment", downloadFileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),
headers, HttpStatus.CREATED);
}
}
