UTF-8 encoding issue in Response in Tomcat

I have observed UTF-8 encoding issue for JSON response in Tomcat. By default tomcat uses ISO-8859-1. Below are the solution approaches:

Tomcat response (response is appended with ISO-8859-1 charset by Tomcat)

Content-Type: application/json;charset=ISO-8859-1

Solution:

Approach #1:

Add the below code in custom filter or servlet before sending the response

response.setCharacterEncoding("UTF-8");

Approach #2: (Better approach)

Use filter provided by Spring framework as mentioned below; which make the response to UTF-8 (Can add any other charset also).

Please add the below part in web.xml. The respective jar exists in spring-web dependency module.

Snippet to add in web.xml:

<filter>

    <filter-name>encodingFilter</filter-name>

    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

    <init-param>

        <param-name>encoding</param-name>

        <param-value>UTF-8</param-value>

    </init-param>

    <init-param>

        <param-name>forceEncoding</param-name>

        <param-value>true</param-value>

    </init-param>

</filter>

<filter-mapping>

    <filter-name>encodingFilter</filter-name>

    <url-pattern>/*</url-pattern>

</filter-mapping>