## Files List
### pom.xml
```
4.0.0
com.in28minutes
in28Minutes-first-webapp
0.0.1-SNAPSHOT
war
javax
javaee-web-api
6.0
provided
javax.servlet
jstl
1.2
org.webjars
bootstrap
3.3.6
org.webjars
jquery
1.9.1
org.apache.maven.plugins
maven-compiler-plugin
3.2
true
1.7
1.7
true
org.apache.tomcat.maven
tomcat7-maven-plugin
2.2
/
true
```
### src/main/java/com/in28minutes/filter/LoginRequiredFilter.java
```
package com.in28minutes.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
@WebFilter(urlPatterns = "*.do")
public class LoginRequiredFilter implements Filter {
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest servletRequest,
ServletResponse servletResponse, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
if (request.getSession().getAttribute("name") != null) {
chain.doFilter(servletRequest, servletResponse);
} else {
request.getRequestDispatcher("/login.do").forward(servletRequest,
servletResponse);
}
}
@Override
public void init(FilterConfig arg0) throws ServletException {
}
}
```
### src/main/java/com/in28minutes/login/LoginService.java
```
package com.in28minutes.login;
public class LoginService {
public boolean isUserValid(String user, String password) {
if (user.equals("in28Minutes") && password.equals("dummy"))
return true;
return false;
}
}
```
### src/main/java/com/in28minutes/login/LoginServlet.java
```
package com.in28minutes.login;
import java.io.IOException;
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 com.in28minutes.todo.TodoService;
@WebServlet(urlPatterns = "/login.do")
public class LoginServlet extends HttpServlet {
private LoginService userValidationService = new LoginService();
private TodoService todoService = new TodoService();
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(
request, response);
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String name = request.getParameter("name");
String password = request.getParameter("password");
boolean isUserValid = userValidationService.isUserValid(name, password);
if (isUserValid) {
request.getSession().setAttribute("name", name);
response.sendRedirect("/list-todos.do");
} else {
request.setAttribute("errorMessage", "Invalid Credentials!");
request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(
request, response);
}
}
}
```
### src/main/java/com/in28minutes/logout/LogoutServlet.java
```
package com.in28minutes.logout;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(urlPatterns = "/logout.do")
public class LogoutServlet extends HttpServlet {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.getSession().invalidate();
request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(
request, response);
}
}
```
### src/main/java/com/in28minutes/todo/AddTodoServlet.java
```
package com.in28minutes.todo;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(urlPatterns = "/add-todo.do")
public class AddTodoServlet extends HttpServlet {
private TodoService todoService = new TodoService();
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.getRequestDispatcher("/WEB-INF/views/add-todo.jsp").forward(
request, response);
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String newTodo = request.getParameter("todo");
String category = request.getParameter("category");
todoService.addTodo(new Todo(newTodo, category));
response.sendRedirect("/list-todos.do");
}
}
```
### src/main/java/com/in28minutes/todo/DeleteTodoServlet.java
```
package com.in28minutes.todo;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(urlPatterns = "/delete-todo.do")
public class DeleteTodoServlet extends HttpServlet {
private TodoService todoService = new TodoService();
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
todoService.deleteTodo(new Todo(request.getParameter("todo"), request
.getParameter("category")));
response.sendRedirect("/list-todos.do");
}
}
```
### src/main/java/com/in28minutes/todo/ListTodoServlet.java
```
package com.in28minutes.todo;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(urlPatterns = "/list-todos.do")
public class ListTodoServlet extends HttpServlet {
private TodoService todoService = new TodoService();
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setAttribute("todos", todoService.retrieveTodos());
request.getRequestDispatcher("/WEB-INF/views/list-todos.jsp").forward(
request, response);
}
}
```
### src/main/java/com/in28minutes/todo/Todo.java
```
package com.in28minutes.todo;
public class Todo {
private String name;
private String category;
public Todo(String name, String category) {
super();
this.name = name;
this.category = category;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
@Override
public String toString() {
return String.format("Todo [name=%s, category=%s]", name, category);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((name == null) ? 0 : name.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Todo other = (Todo) obj;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
return true;
}
}
```
### src/main/java/com/in28minutes/todo/TodoService.java
```
package com.in28minutes.todo;
import java.util.ArrayList;
import java.util.List;
public class TodoService {
private static List todos = new ArrayList();
static {
todos.add(new Todo("Learn Web Application Development", "Study"));
todos.add(new Todo("Learn Spring MVC", "Study"));
todos.add(new Todo("Learn Spring Rest Services", "Study"));
}
public List retrieveTodos() {
return todos;
}
public void addTodo(Todo todo) {
todos.add(todo);
}
public void deleteTodo(Todo todo) {
todos.remove(todo);
}
}
```
### src/main/webapp/WEB-INF/common/footer.jspf
```