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>
