REST Web服务如何工作

Question

I have a rest web service as below:

@GET
@Path("/getPersonDetails/{personId}/{validDate}")
@Produces("application/xml")
  public PersonDetail getPersonDetails(@PathParam("personId") final String personId,@PathParam("validDate") String validDate) {

    PersonDetail p = new PersonDetail;

    //all the processing to set data into object p

    return p;
}

When called from the browser with appropriate parameters, this service is returning the object as an xml as expected.

However, how does it work internally ?

From where does the tags in the xml get set ?

Is it from

1) the names of the local variables inside the service method

2) the names of class properties in the class

3) the name of the class itself

What happens between the method returning the object and it appearing on browser as XML ?

Thanks for reading!

Answer 1

The XML structure is generated by the Java Architecture for XML Binding . It creates XML tags based on class fields. Of course, this process can be customised. See Lars Vogels tutorial on JAXB for an example of how to achieve this.

After the getPersonDetails() method returns, the JAX-RS runtime invokes the JAXB Marshaller turns the return value of the method into an XML structure, which gets written back to your web browser.