CODEWITHSUNDEEP
javaspringrestjaxbjackson
Raj Singh
Raj Singh

Reputation: 271

Generate JSON using JAXB annotations,Jackson and Spring

I am trying to implement a REST service using Spring 4.

The application is built using Java 7 and runs on Tomcat 7.

The REST method will return a customer object in JSON. The application is annotation-driven.

The Customer class has JAXB annotations. Jackson jars are present in the class path. As per my understanding Jackson will use JAXB annotations to generate the JSON.

The Customer Class :

@XmlRootElement(name = "customer")
public class Customer {
private int id;
private String name;
private List favBookList;
@XmlAttribute
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@XmlElement
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

@XmlElementWrapper(name = "booklist")
@XmlElement(name="book")
public List getFavBookList() {
return favBookList;
}
public void setFavBookList(List favBookList) {
this.favBookList = favBookList;
}
}

I have annotated the REST service class as @RestController (as per Spring 4)

The REST method to return a customer object in JSON:

@RequestMapping(value="/customer.json",produces="application/json")
public  Customer getCustomerInJSON(){
    Customer customerObj = new  Customer();
    customerObj.setId(1);
    customerObj.setName("Vijay");
    ArrayList<String> favBookList = new ArrayList<String>();
    favBookList.add("Book1");
    favBookList.add("Book2");
    customerObj.setFavBookList(favBookList);
    return customerObj;

}

The result I expected, when I hit the URL :

{"id":1,"booklist":{"book":["Book1","Book2"]},"name":"Vijay"}

What I get:

{"id":1,"name":"Vijay","favBookList":["Book1","Book2"]}

It seems Jackson is ignoring the JAXB annotations @XmlElementWrapper(name = "booklist") and @XmlElement(name="book") above getFavBookList() method in Customer class

Am I missing something?

Need guidance. Thanks.

Upvotes: 1

Views: 2957

Answers (1)

Vihar
Vihar

Reputation: 3831

Basically the point is, you have given xml annotations and are expecting Json output.

You need to find out Json equivalent for its xml counter part @xmlElementWrapper.

This feature used to work in jackson 1.x but does not in Jackson 2.x

Upvotes: 1

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