feat: Simplified

src/main/scala/app/model/Model.scala

@@ -1,15 +1,17 @@
 package app.model
 
-import java.util
+import scala.jdk.CollectionConverters._
 
-import app.entities.User
+case class User(name: String, password: String) {
+  def getName: String = name
 
-import scala.jdk.CollectionConverters._
+  override def toString: String = s"User{name='$name', password='$password'}"
+}
 
 object Model {
-  val model: util.ArrayList[User] = new util.ArrayList()
+  val model = collection.mutable.ArrayBuffer[User]()
 
-  def add(user: User): Unit = model.add(user)
+  def add(user: User): Unit = model.append(user)
 
-  def list: util.List[String] = model.asScala.map(_.name).asJava
+  def userList: java.util.List[String] = model.map(_.name).asJava
 }

src/main/scala/app/servlets/AddServlet.scala

@@ -2,27 +2,28 @@ package app.servlets
 
 import java.io.IOException
 
-import app.entities.User
-import app.model.Model
+import app.model.{Model, User}
 import javax.servlet.ServletException
+import javax.servlet.annotation.WebServlet
 import javax.servlet.http.{HttpServlet, HttpServletRequest, HttpServletResponse}
 
-
+@WebServlet(Array("/add"))
 class AddServlet extends HttpServlet {
-  @throws[ServletException]
-  @throws[IOException]
-  override protected def doGet(req: HttpServletRequest, resp: HttpServletResponse): Unit = {
-    val requestDispatcher = req.getRequestDispatcher("views/add.jsp")
-    requestDispatcher.forward(req, resp)
-  }
 
-  @throws[ServletException]
   @throws[IOException]
+  @throws[ServletException]
   override protected def doPost(req: HttpServletRequest, resp: HttpServletResponse): Unit = {
     val name = req.getParameter("name")
-    def user = new User(name, req.getParameter("pass"))
-    Model.add(user)
+
+    Model.add(User(name, req.getParameter("pass")))
     req.setAttribute("userName", name)
     doGet(req, resp)
   }
+
+  @throws[IOException]
+  @throws[ServletException]
+  override protected def doGet(req: HttpServletRequest, resp: HttpServletResponse): Unit = {
+    val requestDispatcher = req.getRequestDispatcher("views/add.jsp")
+    requestDispatcher.forward(req, resp)
+  }
 }

src/main/scala/app/servlets/ListServlet.scala

@@ -4,14 +4,16 @@ import java.io.IOException
 
 import app.model.Model
 import javax.servlet.ServletException
+import javax.servlet.annotation.WebServlet
 import javax.servlet.http.{HttpServlet, HttpServletRequest, HttpServletResponse}
 
-
+@WebServlet(Array("/list"))
 class ListServlet extends HttpServlet {
-  @throws[ServletException]
+
   @throws[IOException]
+  @throws[ServletException]
   override protected def doGet(req: HttpServletRequest, resp: HttpServletResponse): Unit = {
-    req.setAttribute("userNames", Model.list)
+    req.setAttribute("userNames", Model.userList)
     val requestDispatcher = req.getRequestDispatcher("views/list.jsp")
     requestDispatcher.forward(req, resp)
   }