Servlets with jsps

.gitignore

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+*.iml
+target/
+.idea/

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.codeup.adlister</groupId>
+    <artifactId>adlister</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>war</packaging>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.6.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+            <version>3.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>jstl</groupId>
+            <artifactId>jstl</artifactId>
+            <version>1.2</version>
+        </dependency>
+    </dependencies>
+
+
+</project>

src/main/java/ColorPageServlet.java

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+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(name="ColorPageServlet", urlPatterns = "/pickcolor")
+public class ColorPageServlet extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.getRequestDispatcher("/pickcolor.jsp").forward(req,resp);
+    }
+
+//    @Override
+//    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+//        req.getParameter("pickColor");
+//        req.getRequestDispatcher("/viewcolor.jsp").forward(req,resp);
+//    }
+}

src/main/java/CorrectServlet.java

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+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(name="CorrectServlet", urlPatterns = "/correct")
+
+public class CorrectServlet extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        request.setAttribute("guessResult","correct");
+        request.getRequestDispatcher("/guessResult.jsp").forward(request, response);
+
+
+    }
+}

src/main/java/CounterServlet.java

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+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( name = "CounterServlet", urlPatterns = "/count")
+public class CounterServlet extends HttpServlet {
+    int count  = 0;
+    protected void doGet(HttpServletRequest req, HttpServletResponse res)throws IOException, ServletException {
+      String reset = req.getParameter("reset");
+      if(reset !=  null){
+          count = 0;
+      }
+
+        count++;
+        res.getWriter().println("this page has been visited " + count + " times!");
+
+
+    }
+
+}
+

src/main/java/GuessServlet.java

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+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(name="GuessServlet", urlPatterns = "/guess")
+
+public class GuessServlet extends HttpServlet {
+@Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        String guess = request.getParameter("guess");
+        int random = (int) Math.floor((Math.random() * 3) + 1);
+        String randomNumString = Integer.toString(random);
+
+         if(guess.equalsIgnoreCase(randomNumString)){
+            response.sendRedirect("/correct");
+        }else if(!guess.equalsIgnoreCase(randomNumString)){
+            response.sendRedirect("/incorrect");
+        }
+//    request.setAttribute("guessResult", guess);
+//    request.getRequestDispatcher("/guessResult.jsp").forward(request, response);
+    }
+
+@Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+    request.getRequestDispatcher("/guess.jsp").forward(request, response);
+
+    }
+}

src/main/java/HelloServlet.java

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+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(name = "HelloServlet ",urlPatterns = "/helloLecture")
+public class HelloServlet extends HttpServlet {
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        String name = request.getParameter("name");
+
+        if(name == null){
+           name = "World";
+        }else if(name .equalsIgnoreCase("kelvon")){
+            name = "Mr.Patterson";
+        }
+        request.setAttribute("viewName", name);
+        request.getRequestDispatcher("/hello.jsp").forward(request,response);
+    }
+}

src/main/java/HelloWorldServlet.java

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+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( name = "HelloWorldServlet", urlPatterns = "/hello")
+public class HelloWorldServlet extends HttpServlet {
+//added comment
+
+    protected void doGet(HttpServletRequest req, HttpServletResponse res)throws IOException, ServletException {
+        String name = req.getParameter("name");
+        if( name == null){
+            name = "World";
+            res.getWriter().println("<h1>Hello World</h1>");
+        }
+
+        res.getWriter().println("<h1> hello, " + name + " !</h1>");
+
+
+    }
+
+}

src/main/java/IncorrectServlet.java

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+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(name="IncorrectServlet", urlPatterns = "/incorrect")
+
+public class IncorrectServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        request.setAttribute("guessResult","incorrect");
+        request.getRequestDispatcher("/guessResult.jsp").forward(request, response);
+
+    }
+}

src/main/java/MvcLecture/CreateProductServlet.java

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+package MvcLecture;
+
+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(name="CreateProductServlet", urlPatterns = "/products/create")
+public class CreateProductServlet extends HttpServlet {
+
+
+        @Override
+        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+            request.getRequestDispatcher("/createProduct.jsp").forward(request, response);
+        }
+
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        Products productsDao = DaoFactory.getProductsDao();
+        // create a new product based on the submitted data
+        String name = request.getParameter("name");
+        double price = Double.parseDouble(request.getParameter("price"));
+        Product product = new Product(name, price);
+        // persist the new product
+        productsDao.insert(product);
+        response.sendRedirect("/products");
+    }
+}

src/main/java/MvcLecture/CsvProductsDao.java

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+package MvcLecture;
+
+public class CsvProductsDao {
+}

src/main/java/MvcLecture/DaoFactory.java

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+package MvcLecture;
+
+public class DaoFactory {
+    private static Products productsDao;
+
+    public static Products getProductsDao(){
+        if(productsDao == null){
+            productsDao = new ListProductsDao();
+        }
+        return productsDao;
+    }
+}

src/main/java/MvcLecture/ListProductsDao.java

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+package MvcLecture;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ListProductsDao implements Products{
+    //structure to return all the products
+    private List<Product> products = new ArrayList<>();
+
+
+    // When an instance of this class is created, we'll populate the
+    // products array list with data, "faking" the records
+    public  ListProductsDao(){
+        insert(new Product("hammer", 9.99));
+        insert(new Product("screwdriver", 9.99));
+        insert(new Product("drill", 19.99));
+    }
+
+    @Override //@Override makes sure we are overriding from the super
+
+    public List<Product> all() {
+        return this.products;
+    }
+
+    @Override //@Override makes sure we are overriding from the super
+    // Persist a new record. We'll simulate this by adding the passed object
+    // to our internal array list of products.
+    public void insert(Product product) {
+        this.products.add(product);
+    }
+}

src/main/java/MvcLecture/Product.java

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+package MvcLecture;
+
+public class Product {
+    private String name; //fields(informed by the entity
+    private double price;//fields
+
+    public Product(){
+        //empty constructor always necessary
+    }
+    public Product(String name, double price){
+        this.name = name;
+        this.price=price;
+    }//filled constructor
+}

src/main/java/MvcLecture/Products.java

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+package MvcLecture;
+
+
+import java.util.List;
+
+public interface Products {
+    //here we provide the behaviors/methods // List Data types
+    List<Product> all();
+    void insert(Product product);
+}

src/main/java/MvcLecture/ShowProductsServlet.java

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+package MvcLecture;
+
+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.util.List;
+
+@WebServlet(name= "ShowProductServlet", urlPatterns = "/products")
+public class ShowProductsServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
+        //"Hey Servlet go instantiate from that getProductsDao method i set up! == get a DAI object
+        Products productsDao= DaoFactory.getProductsDao();
+
+        //Let's go get the products
+
+        List<Product> showProducts = productsDao.all();
+
+
+        req.setAttribute("products", showProducts);
+        req.getRequestDispatcher("/productIndex.jsp").forward(req, res);
+        //
+    }
+}

src/main/java/PizzaOrderServlet.java

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+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(name="PizzaOrderServlet", urlPatterns = "/pizza-order")
+public class PizzaOrderServlet extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        req.getRequestDispatcher("/pizza-order.jsp").forward(req,resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        System.out.println(req.getParameter("crust"));
+        System.out.println(req.getParameter("sauce"));
+        System.out.println(req.getParameter("crust-size"));
+        System.out.println(req.getParameter("pepperoni"));
+        System.out.println(req.getParameter("sausage"));
+        System.out.println(req.getParameter("bacon"));
+        System.out.println(req.getParameter("onion"));
+        System.out.println(req.getParameter("mushrooms"));
+        System.out.println(req.getParameter("pineapple"));
+        System.out.println(req.getParameter("address"));
+       req.getRequestDispatcher("/pizza-order.jsp").forward(req,resp);
+    }
+}