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devops
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Java Web Calculator
1 parent b69e006 commit ca43996

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‎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/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.web.cal</groupId>
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<artifactId>WebAppCal</artifactId>
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<packaging>war</packaging>
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<version>0.0.1-SNAPSHOT</version>
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<name>WebAppCal Maven Webapp</name>
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<url>http://maven.apache.org</url>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.8.1</version>
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<scope>test</scope>
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</dependency>
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<!-- https://mvnrepository.com/artifact/javax.servlet/servlet-api -->
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>servlet-api</artifactId>
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<version>2.5</version>
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</dependency>
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</dependencies>
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<build>
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<finalName>WebAppCal</finalName>
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</build>
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</project>

‎src/main/java/mypackage/Calculator.java‎

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package mypackage;
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import java.io.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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public class Calculator extends HttpServlet
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{
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public long addFucn(long first, long second){
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return first+second;
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}
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public long subFucn(long first, long second){
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return second-first;
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}
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public long mulFucn(long first, long second){
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return first*second;
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}
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
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{
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try
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{
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response.setContentType("text/html");
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PrintWriter out= response.getWriter();
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int a1= Integer.parseInt(request.getParameter("n1"));
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int a2= Integer.parseInt(request.getParameter("n2"));
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if(request.getParameter("r1")!=null)
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{
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out.println("<h1>Addition</h1>"+addFucn(a1, a2));
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}
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if(request.getParameter("r2")!=null)
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{
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out.println("<h1>Substraction</h1>"+subFucn(a1, a2));
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}
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if(request.getParameter("r3")!=null)
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{
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out.println("<h1>Multiplication</h1>"+mulFucn(a1, a2));
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}
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RequestDispatcher rd=request.getRequestDispatcher("/index.jsp");
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rd.include(request, response);
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}
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catch(Exception e)
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{
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}
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}
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}

‎src/main/webapp/WEB-INF/web.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
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<display-name>Servlet</display-name>
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<servlet>
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<servlet-name>Servlet</servlet-name>
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<servlet-class>mypackage.Calculator</servlet-class>
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</servlet>
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<servlet-mapping>
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<servlet-name>Servlet</servlet-name>
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<url-pattern>/firstHomePage</url-pattern>
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</servlet-mapping>
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<welcome-file-list>
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<welcome-file>index.jsp</welcome-file>
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</welcome-file-list>
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</web-app>

‎src/main/webapp/index.jsp‎

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Calculator</title>
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</head>
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<body>
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<h1 style="text_align=center">Calculator</h1>
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<form action="firstHomePage" method="get">
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<label>first number:</label>
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<input type="text" name="n1" />
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<br />
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<label>Second number : </label>
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<input type="text" name="n2" />
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<br />
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<div>
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<label>
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<input type="radio" name="r1" value="add" />addition
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<br />
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</label>
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<input type="radio" name="r2" value="sub" />subtraction
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<br />
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<input type="radio" name="r3" value="mul" />multiplication
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<br />
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</div>
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<input type="submit" value="submit" />
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</form>
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</body>
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</html>

‎src/test/java/mypackage/CalculatorTest.java‎

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package mypackage;
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import org.junit.Test;
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import static org.hamcrest.CoreMatchers.is;
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import static org.junit.Assert.assertThat;
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public class CalculatorTest {
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@Test
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public void twoAndThreeIsFive() throws Exception {
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final long result = new Calculator().addFucn(2, 3);
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assertThat(result, is(5L));
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}
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@Test
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public void threeMinusTwoIsOne() throws Exception {
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final long result = new Calculator().subFucn(2, 3);
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assertThat(result, is(1L));
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}
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@Test
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public void threeXThreeIsNine() throws Exception {
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final long result = new Calculator().mulFucn(3, 3);
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assertThat(result, is(9L));
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}
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}

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