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Init from sample
kasundharmadasa/LiquorStoreServlet@1d375a9 from https://medium.com/@kasunpdh/sample-java-web-application-using-servlets-and-jsp-5621cad2f582
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‎pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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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.sample</groupId>
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<artifactId>LiquorStoreApp</artifactId>
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<version>1.0-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.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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<version>3.0.1</version>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<finalName>SampleServlet</finalName>
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<plugins>
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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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</plugin>
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</plugins>
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</build>
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</project>
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‎src/main/java/com/sample/LiquorService.java‎

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package com.sample;
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import com.sample.model.LiquorType;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Created by kasun on 5/24/17.
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*/
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public class LiquorService {
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public List getAvailableBrands(LiquorType type){
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List brands = new ArrayList();
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if(type.equals(LiquorType.WINE)){
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brands.add("Adrianna Vineyard");
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brands.add(("J. P. Chenet"));
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}else if(type.equals(LiquorType.WHISKY)){
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brands.add("Glenfiddich");
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brands.add("Johnnie Walker");
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}else if(type.equals(LiquorType.BEER)){
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brands.add("Corona");
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}else {
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brands.add("No Brand Available");
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}
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return brands;
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}
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}

‎src/main/java/com/sample/SelectLiquorServlet.java‎

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package com.sample;
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import com.sample.model.LiquorType;
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import javax.servlet.RequestDispatcher;
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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 java.io.IOException;
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import java.util.List;
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@WebServlet(
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name = "selectliquorservlet",
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urlPatterns = "/SelectLiquor"
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)
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public class SelectLiquorServlet extends HttpServlet {
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@Override
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protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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String liquorType = req.getParameter("Type");
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LiquorService liquorService = new LiquorService();
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LiquorType l = LiquorType.valueOf(liquorType);
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List liquorBrands = liquorService.getAvailableBrands(l);
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req.setAttribute("brands", liquorBrands);
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RequestDispatcher view = req.getRequestDispatcher("result.jsp");
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view.forward(req, resp);
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}
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}

‎src/main/java/com/sample/model/LiquorType.java‎

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package com.sample.model;
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/**
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* Created by kasun on 5/24/17.
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*/
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public enum LiquorType {
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WINE,BEER,WHISKY
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}

‎src/main/webapp/WEB-INF/web.xml‎

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<session-config>
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<tracking-mode>COOKIE</tracking-mode>
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</session-config>

‎src/main/webapp/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Liquor Store</title>
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</head>
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<body>
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<center>
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<h1>
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Select the type of Liquor
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</h1>
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<form method="post" action="SelectLiquor">
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<br>
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<select name="Type" size="1">
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<option>WINE</option>
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<option>WHISKY</option>
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<option>BEER</option>
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</select>
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<br><br>
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<input type="submit">
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</form>
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</center>
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</body>
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</html>

‎src/main/webapp/result.jsp‎

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<%@ page import ="java.util.*" %>
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<!DOCTYPE html>
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<html>
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<body>
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<center>
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<h1>
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Available Brands
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</h1>
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<%
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List result= (List) request.getAttribute("brands");
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Iterator it = result.iterator();
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out.println("<br>We have <br><br>");
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while(it.hasNext()){
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out.println(it.next()+"<br>");
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}
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%>
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</body>
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</html>

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