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Ranga Rao KaranamRanga Rao Karanam
Ranga Rao Karanam
authored and
Ranga Rao Karanam
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90% Video Recording Complete - Adding Source Files
1 parent 651ef8d commit 807bc97

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+450
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lines changed

‎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"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.in28minutes</groupId>
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<artifactId>in28Minutes-first-webapp</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>war</packaging>
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<dependencies>
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<dependency>
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<groupId>javax</groupId>
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<artifactId>javaee-web-api</artifactId>
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<version>6.0</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>jstl</artifactId>
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<version>1.2</version>
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</dependency>
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<dependency>
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<groupId>org.webjars</groupId>
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<artifactId>bootstrap</artifactId>
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<version>3.3.6</version>
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</dependency>
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<dependency>
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<groupId>org.webjars</groupId>
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<artifactId>jquery</artifactId>
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<version>1.9.1</version>
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</dependency>
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</dependencies>
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<build>
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<pluginManagement>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.2</version>
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<configuration>
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<verbose>true</verbose>
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<source>1.7</source>
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<target>1.7</target>
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<showWarnings>true</showWarnings>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.tomcat.maven</groupId>
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<artifactId>tomcat7-maven-plugin</artifactId>
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<version>2.2</version>
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<configuration>
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<path>/</path>
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<contextReloadable>true</contextReloadable>
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</configuration>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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</project>

‎src/main/java/com/in28minutes/filter/LoginRequiredFilter.java

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package com.in28minutes.filter;
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import java.io.IOException;
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import javax.servlet.Filter;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.annotation.WebFilter;
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import javax.servlet.http.HttpServletRequest;
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@WebFilter(urlPatterns = "*.do")
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public class LoginRequiredFilter implements Filter {
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@Override
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public void destroy() {
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}
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@Override
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public void doFilter(ServletRequest servletRequest,
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ServletResponse servletResponse, FilterChain chain)
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throws IOException, ServletException {
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HttpServletRequest request = (HttpServletRequest) servletRequest;
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if (request.getSession().getAttribute("name") != null) {
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chain.doFilter(servletRequest, servletResponse);
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} else {
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request.getRequestDispatcher("/login.do").forward(servletRequest,
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servletResponse);
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}
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}
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@Override
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public void init(FilterConfig arg0) throws ServletException {
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}
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}

‎src/main/java/com/in28minutes/login/LoginService.java

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package com.in28minutes.login;
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public class LoginService {
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public boolean isUserValid(String user, String password) {
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if (user.equals("in28Minutes") && password.equals("dummy"))
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return true;
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return false;
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}
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}

‎src/main/java/com/in28minutes/login/LoginServlet.java

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package com.in28minutes.login;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import com.in28minutes.todo.TodoService;
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@WebServlet(urlPatterns = "/login.do")
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public class LoginServlet extends HttpServlet {
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private LoginService userValidationService = new LoginService();
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private TodoService todoService = new TodoService();
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(
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request, response);
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}
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protected void doPost(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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String name = request.getParameter("name");
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String password = request.getParameter("password");
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boolean isUserValid = userValidationService.isUserValid(name, password);
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if (isUserValid) {
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request.getSession().setAttribute("name", name);
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response.sendRedirect("/todo.do");
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} else {
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request.setAttribute("errorMessage", "Invalid Credentials!");
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request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(
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request, response);
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}
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}
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}

‎src/main/java/com/in28minutes/logout/LogoutServlet.java

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package com.in28minutes.logout;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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@WebServlet(urlPatterns = "/logout.do")
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public class LogoutServlet extends HttpServlet {
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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request.getSession().invalidate();
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request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(
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request, response);
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}
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}

‎src/main/java/com/in28minutes/todo/AddTodoServlet.java

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package com.in28minutes.todo;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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@WebServlet(urlPatterns = "/add-todo.do")
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public class AddTodoServlet extends HttpServlet {
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private TodoService todoService = new TodoService();
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protected void doPost(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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String newTodo = request.getParameter("todo");
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todoService.addTodo(new Todo(newTodo));
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response.sendRedirect("/todo.do");
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}
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}

‎src/main/java/com/in28minutes/todo/DeleteTodoServlet.java

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package com.in28minutes.todo;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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@WebServlet(urlPatterns = "/delete-todo.do")
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public class DeleteTodoServlet extends HttpServlet {
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private TodoService todoService = new TodoService();
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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todoService.deleteTodo(new Todo(request.getParameter("todo")));
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response.sendRedirect("/todo.do");
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}
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}

‎src/main/java/com/in28minutes/todo/ListTodoServlet.java

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package com.in28minutes.todo;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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@WebServlet(urlPatterns = "/todo.do")
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public class ListTodoServlet extends HttpServlet {
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private TodoService todoService = new TodoService();
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response) throws ServletException, IOException {
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request.setAttribute("todos", todoService.retrieveTodos());
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request.getRequestDispatcher("/WEB-INF/views/todo.jsp").forward(
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request, response);
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}
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}

‎src/main/java/com/in28minutes/todo/Todo.java

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package com.in28minutes.todo;
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public class Todo {
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private String name;
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public Todo(String name) {
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super();
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this.name = name;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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@Override
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public String toString() {
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return String.format("Todo [name=%s]", name);
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + ((name == null) ? 0 : name.hashCode());
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return result;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj)
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return true;
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if (obj == null)
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return false;
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if (getClass() != obj.getClass())
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return false;
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Todo other = (Todo) obj;
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if (name == null) {
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if (other.name != null)
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return false;
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} else if (!name.equals(other.name))
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return false;
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return true;
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}
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}

‎src/main/java/com/in28minutes/todo/TodoService.java

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package com.in28minutes.todo;
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import java.util.ArrayList;
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import java.util.List;
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public class TodoService {
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private static List<Todo> todos = new ArrayList<Todo>();
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static {
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todos.add(new Todo("Learn Web Application Development"));
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todos.add(new Todo("Learn Spring MVC"));
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todos.add(new Todo("Learn Spring Rest Services"));
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}
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public List<Todo> retrieveTodos() {
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return todos;
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}
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public void addTodo(Todo todo) {
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todos.add(todo);
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}
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public void deleteTodo(Todo todo) {
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todos.remove(todo);
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}
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}

‎src/main/webapp/WEB-INF/views/login.jsp

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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
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<!DOCTYPE html>
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<html>
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<head>
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<title>Todos</title>
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<link href="webjars/bootstrap/3.3.6/css/bootstrap.min.css"
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rel="stylesheet">
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<style>
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.footer {
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position: absolute;
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bottom: 0;
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width: 100%;
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height: 60px;
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background-color: #f5f5f5;
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}
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</style>
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</head>
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<body>
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<nav class="navbar navbar-default">
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<a href="/" class="navbar-brand">Brand</a>
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<ul class="nav navbar-nav">
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<li class="active"><a href="#">Home</a></li>
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<li><a href="/todo.do">Todos</a></li>
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<li><a href="http://www.in28minutes.com">In28Minutes</a></li>
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</ul>
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<ul class="nav navbar-nav navbar-right">
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<li><a href="/login.do">Login</a></li>
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</ul>
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</nav>
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<div class="container">
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<form action="/login.do" method="post">
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<p>
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<font color="red">${errorMessage}</font>
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</p>
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Name: <input type="text" name="name" /> Password:<input
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type="password" name="password" /> <input type="submit"
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value="Login" />
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</form>
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</div>
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<footer class="footer">
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<div>footer content</div>
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</footer>
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<script src="webjars/jquery/1.9.1/jquery.min.js"></script>
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<script src="webjars/bootstrap/3.3.6/js/bootstrap.min.js"></script>
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</body>
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</html>

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