XML与自定义包装器在Java上编组

Question

考虑以下pojo：

public class User {
    private String name;
    /* + getter/setter */
}

和以下REST Web服务：

@Path("Department")
public class DeptoREST {
    @GET @Path("{id}")
    public List<User> getEmployeesList( Integer id ) {
        return dao.fetchEmployeesFromDepto( id );
    }
}

这是结果的输出：

<users>
    <user><name>Usr 1</name></user>
    <user><name>Usr 2</name></user>
    <user><name>Usr 3</name></user>
</users>

没有包装器类，是否可以将Ouput更改为：

<employees>
    <employee><name>Usr 1</name></employee>
    <employee><name>Usr 2</name></employee>
    <employee><name>Usr 3</name></employee>
</employees>

Answer 1

您可以包装列表，而不是单个User对象：

@XmlRootElement(name="employees")
public static class EmployeeList {
    @XmlElement(name = "employee")
    private List<User> users;
    public EmployeeList() {
        users = Collections.emptyList();
    }
    public EmployeeList(List<User> users) {
        this.users = users;
    }
    public List<User> getUsers() {
        return users;
    }
}

然后：

return new EmployeeList(dao.fetchEmployeesFromDepto( id ));