Include jsonp-filter in your pom.xml:
<dependencies>
<dependency>
<groupId>com.earldouglas</groupId>
<artifactId>jsonp-filter</artifactId>
<version>1.0.0</version>
</dependency>
</dependencies>Add a JsonPFilter to your web.xml:
<filter>
<filter-name>jsonp-filter</filter-name>
<filter-class>com.earldouglas.jsonpfilter.JsonPFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>jsonp-filter</filter-name>
<url-pattern>/foo</url-pattern>
</filter-mapping>Optionally configure the callback parameter name (defaults to callback) and the variable parameter name (defaults to variable):
<filter>
<filter-name>jsonp-filter</filter-name>
<filter-class>com.earldouglas.jsonpfilter.JsonPFilter</filter-class>
<init-param>
<param-name>callbackParam</param-name>
<param-value>calleybackey</param-value>
</init-param>
<init-param>
<param-name>variableParam</param-name>
<param-value>custom</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>jsonp-filter</filter-name>
<url-pattern>/foo</url-pattern>
</filter-mapping>Now any requests to /foo with the callback query parameter set will have their responses wrapped in callback(...). All responses with the query parameter variable set will be like var variable = ...;. In the second case, responses will be wrapped in calleybackey(...) or set to var custom = ...;.
If you do not use a web.xml config file and want to instantiate the filter manually, you can use:
JSsonPFilter filter = new JsonPFilter();
filter.setCallbackParam("customCallback");
filter.setVariableParam("customVariable");
Or:
JsonPFilter filter = new JsonPFilter("customCallback", "customVariable");
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