Bael 1601 redirects (#4006)

* tidy pom
move classes to javax-servlets

* move into spring-mvc-simple

* updated POM to handle no default tests in module

spring-mvc-simple/src/main/java/com/baeldung/spring/servlets/ForwardedServlet.java

@@ -0,0 +1,20 @@
+package com.baeldung.spring.servlets;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+@WebServlet("/forwarded")
+public class ForwardedServlet extends HttpServlet {
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        PrintWriter out = resp.getWriter();
+        out.write("In forwarded servlet page.");
+        out.write("\nWelcome:" + req.getParameter("name"));
+    }
+
+}

spring-mvc-simple/src/main/java/com/baeldung/spring/servlets/HelloServlet.java

@@ -0,0 +1,19 @@
+package com.baeldung.spring.servlets;
+
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@WebServlet("/hello")
+public class HelloServlet extends HttpServlet {
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        RequestDispatcher dispatcher = req.getRequestDispatcher("/forwarded");
+        dispatcher.forward(req, resp);
+    }
+
+}

spring-mvc-simple/src/main/java/com/baeldung/spring/servlets/RedirectedServlet.java

@@ -0,0 +1,20 @@
+package com.baeldung.spring.servlets;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+@WebServlet("/redirected")
+public class RedirectedServlet extends HttpServlet {
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        PrintWriter out = resp.getWriter();
+        out.write("In redirected servlet page.");
+        out.write("\nWelcome:" + req.getParameter("name"));
+    }
+
+}

spring-mvc-simple/src/main/java/com/baeldung/spring/servlets/WelcomeServlet.java

@@ -0,0 +1,17 @@
+package com.baeldung.spring.servlets;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@WebServlet("/welcome")
+public class WelcomeServlet extends HttpServlet {
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        resp.sendRedirect(req.getContextPath() + "/redirected");
+    }
+
+}

spring-mvc-simple/src/test/java/com/baeldung/spring/servlets/HelloServletTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.spring.servlets;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import javax.servlet.ServletException;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class HelloServletTest {
+    @Test
+    public void whenRequested_thenForwardToCorrectUrl() throws ServletException, IOException {
+        MockHttpServletRequest request = new MockHttpServletRequest("GET", "/hello");
+        request.addParameter("name", "Dennis");
+        MockHttpServletResponse response = new MockHttpServletResponse();
+        HelloServlet servlet = new HelloServlet();
+
+        servlet.doGet(request, response);
+
+        assertEquals("/forwarded", response.getForwardedUrl());
+        assertEquals(200, response.getStatus());
+    }
+}

spring-mvc-simple/src/test/java/com/baeldung/spring/servlets/WelcomeServletTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.spring.servlets;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import javax.servlet.ServletException;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class WelcomeServletTest {
+    @Test
+    public void whenRequested_thenRedirectedToCorrectUrl() throws ServletException, IOException {
+        MockHttpServletRequest request = new MockHttpServletRequest("GET", "/welcome");
+        request.addParameter("name", "Dennis");
+        WelcomeServlet servlet = new WelcomeServlet();
+        MockHttpServletResponse response = new MockHttpServletResponse();
+        
+        servlet.doGet(request, response);
+        
+        assertEquals("/redirected", response.getRedirectedUrl());
+        assertEquals(302, response.getStatus());
+    }
+}