json的key值为字符串类型，但是当只含有数字和.的时候处理有问题

[baijian]

String a = "{\"key\":\"value\",\"10.0.1.1\":\"haha\"}";
         Object x = JSON.parse(a);
        JSONPath.set(x, "$.test" , "abc");
        Object o = JSONPath.eval(x, "$.10\\.0\\.1\\.1");

异常:
Exception in thread "main" java.lang.NumberFormatException: For input string: "10.0.1.1"