How to get with MappingJacksonHttpMessageConverter a Json with Pascal casing? - json

Question

Here is the thing... i'm using jtable (jquery) to show some user data. This component needs a json with two fields: Result and Records. In my controller i have a method to return the json:
#RequestMapping(method=RequestMethod.POST, value="/getUsersInJson")
public #ResponseBody String getUsersInJsonHandler(){
ElementsInList<User> users = new ElementsInList<User>();
users.setItems(userService.getUsers());
return users;
}
The class ElementsInList contains two fields: result and records. Result is a string to get the success message and records is a parametrized list which contains in this case a list of users. I get this JSON:
"{"result":"OK","records":[{"username":"john",
But i need this:
"{"Result":"OK","Records":[{"username":"john",...
This is my Mapping:
<!-- Json converter bean -->
<bean id="jacksonMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="jacksonMessageConverter"/>
</list>
</property>
</bean>
How can i do it? I've checked some posts but have old versions.
I'm using Spring 3, Spring MVC and jQuery.

Answer 1

I solved it by using JsonProperty annotation. You can give the name that jackson will use to build the json field. Here there is an example with jtable (jquery):
public class ElementsInList<T> {
#JsonProperty("Result")
private String result = "OK";
#JsonProperty("Records")
private List<T> records;
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
}
public List<T> getRecords() {
return records;
}
public void setRecords(List<T> records) {
this.records = records;
}
}
The result json is this: {"Result":"OK","Records":[{"roleName":"admin"...
But there is more about this annotations. Check the api for more info: http://fasterxml.github.io/jackson-annotations/javadoc/2.1.0/com/fasterxml/jackson/annotation/package-summary.html