1、接收到的是图片的流时
//上传头像
@RequestMapping(value = "/uploadHeadSculpture", method = RequestMethod.POST)
@ResponseBody
public String uploadHeadSculpture(@RequestParam("photo") String file) {
User user = (User) SecurityUtils.getSubject().getSession().getAttribute("curr_user");
//获取文件格式
String postfix = file.split("/")[1].split(";")[0];
//获取图片的Base64码
String str = file.split(",")[1];
String url = "";
BASE64Decoder decoder = new BASE64Decoder();
try {
// Base64解码
byte[] bytes = decoder.decodeBuffer(str);
for (int i = 0; i < bytes.length; ++i) {
// 调整异常数据
if (bytes[i] < 0) {
bytes[i] += 256;
}
}
long title = Calendar.getInstance().getTimeInMillis();
//获取系统路径并设定文件保存的目录
String dir = ServiceConfigUtil.getValue("imgpath");//图片的上传路径，我这里是从工程的配置文件获取的
String fileName = title + "." + postfix;
// 生成jpeg图片
FileUtils.writeByteArrayToFile(new File(dir, fileName), bytes);
String lookUserPhoto = ServiceConfigUtil.getValue("lookUserPhoto");//图片的访问路径，我这里是从工程配置文件获取的，可以自己定义。如果你的图片保存在工程目录下，可以直接用dir+fileName
url = lookUserPhoto + fileName;//保存到数据库的图片访问路径
/××
×保存url到数据库
××/
} catch (Exception e) {return "no";
}return "yes";
}
注：接收参数file值的一个基本格式
"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAYAAADDPmHLAAAdiUlEQVR........."
2、接收到的是file文件直接上传
@RequestMapping(value={"/saveOrUpdate"},method=RequestMethod.POST)
public String saveOrUpdate(Person p, @RequestParam("photo") MultipartFile file, HttpServletRequest request) throws IOException{
if(!file.isEmpty()){
ServletContext sc = request.getSession().getServletContext();
String dir = sc.getRealPath(“/upload”); //设定文件保存的目录
String filename = file.getOriginalFilename(); //得到上传时的文件名
FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());
p.setPhotoPath(“/upload/”+filename); //设置图片所在路径
System.out.println("upload over. "+ filename);
}
ps.saveOrUpdate(p);
return "redirect:/person/list.action"; //重定向
}
2.1、页面
<form action="/saveOrUpdate" enctype="multipart/form-data" method="post">
<input type="file" name="photo">
<input type="submit" value="commit">
</form>
2.2、需要在springmvc配置文件中添加
<!--上传文件-->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10000000000000"/>
<property name="defaultEncoding" value="UTF-8"/>
</bean>
3、文件下载
private void downFile(String filename, String realPath, HttpServletResponse response) throws IOException {
try {
filename = new String(filename.getBytes("ISO-8859-1"), "UTF-8");
} catch (UnsupportedEncodingException e) {
log.warn("文件转码出现异常异常信息为：" + ExceptionUtil.print(e));
}
log.debug("下载的文件名：" + filename);
log.debug("下载的文件路径：" + realPath);
OutputStream os = null;
InputStream inputStream = null;
try {
response.setCharacterEncoding("utf-8");
response.setContentType("multipart/form-data");
response.setContentType("application/x-download");
response.setHeader("Content-Disposition", "attachment;fileName="
+ filename);
inputStream = new FileInputStream(realPath);
os = response.getOutputStream();
byte[] b = new byte[1024];
int length;
while ((length = inputStream.read(b)) != -1) {
os.write(b, 0, length);
}
os.flush();
} catch (IOException e) {
log.warn("下载文件出现异常，异常信息为：" + ExceptionUtil.print(e));
} finally {
inputStream.close();
os.close();
}
}