Spring Web MVC Example.

CalcController.java

@Controller
public class CalcController {

    @RequestMapping("/")
    public void welcomeHandler() {
    }

    @RequestMapping("/plus")
    public ModelMap plus(Integer a, Integer b) {
        ModelMap m = new ModelMap();
        // JSP에서 표시할 내용들을 바인딩.
        m.put("a", a);
        m.put("b", b);
        m.put("result", a + b); // a+b=?
        return m;
    }

}

plus.jsp

${a} + ${b} = <b>${result}</b>