Special characters sent by Gson in Spring with @RequestMapping

I had a problem with special characters, my problem consist in:

1. query in oracle


2. send by spring mvc controller


3. angular js take the json an show in the view

when i do: System.out.println(gson.toJson(result));

show me: "MÉRITOS"

but when i do the test with postman for test my restful show me: "M�ritos"

so, i had to review my jsp tags:

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

i had configure the web.xml

<jsp-config>
    <jsp-property-group>
        <url-pattern>*.jsp</url-pattern>
        <page-encoding>UTF-8</page-encoding>
    </jsp-property-group>
</jsp-config>

i had review mi bean in gson and the response for spring, but the problem that i found is that my oracle charset is another not compatible whit utf-8:

SELECT value FROM NLS_DATABASE_PARAMETERS where parameter='NLS_CHARACTERSET';

show me WE8ISO8859P1.

My solution was edit my @RequestMapping:

@RequestMapping(value = "xxxx", params = {"xxxx","xxxx"}, method = RequestMethod.GET, produces={"application/json; charset=ISO-8859-1"})

put charset=ISO-8859-1, so you have put the charset that you bd was configured.