PwController.java package secure.ch04.ex01.controller; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; @Controller @RequestMapping("/ch04/ex01/pw"..