Initial Commit

.gitignore

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+target
+*.class

pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>me.nknj</groupId>
+  <artifactId>mvcDemo</artifactId>
+  <packaging>war</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <name>mvcDemo Maven Webapp</name>
+  <url>http://maven.apache.org</url>
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>javax.servlet-api</artifactId>
+      <version>3.1.0</version>
+    </dependency>
+  </dependencies>
+  <build>
+    <finalName>mvcDemo</finalName>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-dependency-plugin</artifactId>
+        <version>2.8</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>copy</goal>
+            </goals>
+            <configuration>
+              <artifactItems>
+                <artifactItem>
+                  <groupId>org.eclipse.jetty</groupId>
+                  <artifactId>jetty-runner</artifactId>
+                  <version>9.1.0.RC1</version>
+                  <destFileName>jetty-runner.jar</destFileName>
+                </artifactItem>
+              </artifactItems>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>

src/main/java/controller/DashboardServlet.java

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+package controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.RequestDispatcher;
+
+public class DashboardServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+    	RequestDispatcher rd = req.getRequestDispatcher("dashboard.jsp");
+        rd.forward(req, resp);
+    }
+
+}

src/main/java/controller/SignUpServlet.java

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+package controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.RequestDispatcher;
+
+import model.entity.User;
+import model.UserManager;
+
+public class SignUpServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+    	RequestDispatcher rd = req.getRequestDispatcher("signup.html");
+        rd.forward(req, resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+    	String username = req.getParameter("username");
+    	String password = req.getParameter("password");
+    	UserManager.addUser(username, password);
+
+    	resp.sendRedirect("/dashboard");
+    }
+
+
+}

src/main/java/model/UserManager.java

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+package model;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
+import model.entity.User;
+
+public class UserManager {
+
+	private static final String USER_DATA_FILE = "users.txt";
+
+	public static void addUser(String username, String password) {
+
+		try {
+            FileWriter writer = new FileWriter(USER_DATA_FILE);
+            writer.write(username + " " + password);
+            writer.close();
+        } catch (IOException e) {
+            System.out.println(e.getMessage());
+        }
+	}
+
+	public static User getUser() {
+
+		try {
+            BufferedReader br = new BufferedReader(new FileReader(USER_DATA_FILE));
+            String content = br.readLine();
+            if (content != null) {
+            	String[] tokens = content.split(" ");
+            	String username = tokens[0];
+            	String password = tokens[1];
+            	return new User(username, password);
+            }
+        } catch (IOException e) {
+            System.out.println(e.getMessage());
+        }
+
+        return null;
+	}
+
+}

src/main/java/model/entity/User.java

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+package model.entity;
+
+public class User {
+	private String username;
+	private String password;
+
+	public User(String username, String password) {
+		this.username = username;
+		this.password = password;
+	}
+
+	public String getUsername() {
+		return username;
+	}
+
+	public String getPassword() {
+		return password;
+	}
+}

src/main/webapp/404.html

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+<!DOCTYPE html>
+
+<html>
+<head>
+	<title>User Not Found</title>
+</head>
+<body>
+	<h3>Sorry, User Not Found</h3>
+</body>
+</html>

src/main/webapp/WEB-INF/web.xml

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+<!DOCTYPE web-app PUBLIC
+"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
+"http://java.sun.com/dtd/web-app_2_3.dtd" >
+
+<web-app>
+	<display-name>Archetype Created Web Application</display-name>
+	<servlet>
+		<servlet-name>SignUp</servlet-name>
+		<servlet-class>controller.SignUpServlet</servlet-class>
+	</servlet>
+	<servlet-mapping>
+		<servlet-name>SignUp</servlet-name>
+		<url-pattern>/signup</url-pattern>
+	</servlet-mapping>
+	<servlet>
+		<servlet-name>Dashboard</servlet-name>
+		<servlet-class>controller.DashboardServlet</servlet-class>
+	</servlet>
+	<servlet-mapping>
+		<servlet-name>Dashboard</servlet-name>
+		<url-pattern>/dashboard</url-pattern>
+	</servlet-mapping>
+</web-app>

src/main/webapp/dashboard.jsp

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+<%@ page import="model.entity.User, model.UserManager" %>
+
+<!DOCTYPE html>
+
+<html>
+	<head>
+		<title>Dashboard</title>
+	</head>
+	<body>
+		<%
+			User u = UserManager.getUser();
+			if (u == null) {
+				response.sendRedirect("404.html");
+				return;
+			}
+		%>
+		<h2>
+			Hello, <%=u.getUsername()%>
+		</h2>
+		Your password is <%=u.getPassword()%>, oops!
+	</body>
+</html>

src/main/webapp/signup.html

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+<!DOCTYPE html>
+<html>
+<head>
+	<title>Signup</title>
+</head>
+<body>
+	<h3>Sign Up</h3>
+	<form method="post" action="/signup">
+		<input type="text" name="username" placeholder="Username"></br>
+		<input type="password" name="password" placeholder="Password"></br>
+		<input type="submit" value="Submit">
+	</form>
+</body>
+</html>