act post could not support Multimap type

[leeaee]

When using com.google.common.collect.Multimap as an attribute of entity, the POST method always get null of the Multimap attribute from request body. Reappear method:

1. add Multimap type attribute in entity.

   public Multimap<String, String> permissions;

2. add value for this objects like this:

   Multimap<String, String> multimap = ArrayListMultimap.create();
   multimap .put("admin", "admin.create");
   multimap .put("admin", "admin.update");
   multimap .put("admin", "admin.delete");
   multimap .put("user", "user.create");
   multimap .put("user", "user.delete");

3. Output is correct

   "permissions": {
   "admin": [
   "admin.create",
   "admin.read",
   "admin.update",
    "admin.delete"
   ],
   "user": [
   "user.create",
   "user.read",
   "user.update",
   "user.delete"
   ]
   }

4. Input Multimap parameter could not get value.

[greenlaw110]

I don't see this issue could be fixed very soon. FastJSON doesn't support multimap deserizliation, and the issue was there for long time. For form field binding, app could write a binder. Once fastjson get it's part done, then I will create a builtin binder for multi-map support.