play系列7：上传图片等

request().body().asMultipartFormData() 

官方例子：

public static Result save() {
MultipartFormData body = request().body().asMultipartFormData(); #1
FilePart picture = body.getFile("picture"); #2
Form<models.Product> productForm =
form(models.Product.class).bindFromRequest();
models.Product newProduct = productForm.get();
if (picture != null) {
File file = picture.getFile(); #3
try {
newProduct.picture = IOUtils.
toByteArray(new FileInputStream(file)); #4
} catch(Exception e) {
e.printStackTrace();
}
}
newProduct.saveOrUpdate(); #5
return redirect(routes.Product.all());
}