[BUG] [Java Client]Can't accept map key as c.b.d(dot in the key name) in Named arguments to format message.

Describe the bug
Can't accept map key as a.b.c(dot in the key name) in Named arguments to format message.
Can't get corresponding message if message like below:
"messages.placeholder": "Messages {a}, {b} and {c.b.d} in source"

To Reproduce
Steps to reproduce the behavior:
1.
String msg = "信息 {a}, {b} 以及 {c.b.d} 在资源里";
Map<String, Object> msgargs1 = new HashMap<>();
msgargs1.put("a", "The 1st Message");
msgargs1.put("b", "信息二");
msgargs1.put("c.b.d", "The 3rd message");

FormatUtils.formatMsg(msg, ZHCN, msgargs1);

Expected behavior
java.lang.IllegalArgumentException: Bad argument syntax: [at pattern index 16] "c.b.d} 在资源里"