public String fieldName(String name) {
        return BeanUtils.fieldName(name, this.name());
    }
Using this naming policy with FASTJSON will modify the Java Field name from its camel cased form to a lower case field name where each word is separated by a dot (.).
Here are a few examples of the form "Java Field Name" ---&gt; "JSON Field Name":
someFieldName ---&gt; some.field.name
_someFieldName ---&gt; _some.field.name
aStringField ---&gt; a.string.field
aURL ---&gt; a.u.r.l
Using dots in JavaScript is not recommended since dot is also used for a member sign in expressions. This requires that a field named with dots is always accessed as a quoted property like myobject['my.field']. Accessing it as an object field myobject.my.field will result in an unintended javascript expression.
@since 2.0.7
core/src/main/java/com/alibaba/fastjson2/PropertyNamingStrategy.java