@RestController
@RequestMapping("/rest")
public class DemoRestController {
    //  /rest/getjson?id=1&name=xx
    @RequestMapping(value = "/getjson",produces = "application/json;charset=utf-8")
    public DemoObj getjson(DemoObj obj){
        return new DemoObj(obj.getId()+1,obj.getName()+"yy");
    }
    // /rest/getxml?id=1&name=xx
    @RequestMapping(value = "/getxml",produces = "application/xml;charset=utf-8")
    public DemoObj getxml(DemoObj obj){
        return new DemoObj(obj.getId()+1,obj.getName()+"yy");
    }
}