Context and Servlet Initialization Parameters (#4594)
* Initial Commit * Update pom.xml
This commit is contained in:
Alejandro Gervasio
KevinGilmore
parent
2d6136b475
commit
92acea607e
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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" 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">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung.javax-servlet-init-params</groupId>
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<artifactId>javax-servlet-init-params</artifactId>
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<version>1.0</version>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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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>4.12</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<version>3.9.1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.hamcrest</groupId>
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<artifactId>hamcrest-core</artifactId>
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<version>1.3</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<version>2.18.3</version>
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<scope>test</scope>
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</dependency>
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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>7.0</version>
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<scope>provided</scope>
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</dependency>
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<dependency>
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<groupId>jstl</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>javax.el</groupId>
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<artifactId>el-api</artifactId>
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<version>2.2</version>
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</dependency>
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</dependencies>
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</project>
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package com.baeldung.servlets;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebInitParam;
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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(name = "UserServlet", urlPatterns = {"/userServlet"}, initParams={
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@WebInitParam(name="name", value="Not provided"),
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@WebInitParam(name="email", value="Not provided")})
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public class UserServlet extends HttpServlet {
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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}
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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processRequest(request, response);
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forwardRequest(request, response, "/WEB-INF/jsp/result.jsp");
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}
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protected void processRequest(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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request.setAttribute("name", getRequestParameter(request, "name"));
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request.setAttribute("email", getRequestParameter(request, "email"));
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request.setAttribute("province", getContextParameter("province"));
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request.setAttribute("country", getContextParameter("country"));
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}
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protected String getRequestParameter(HttpServletRequest request, String name) {
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String param = request.getParameter(name);
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return !param.isEmpty() ? param : getInitParameter(name);
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}
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protected String getContextParameter(String name) {
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return getServletContext().getInitParameter(name);
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}
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protected void forwardRequest(HttpServletRequest request, HttpServletResponse response, String path)
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throws ServletException, IOException {
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request.getRequestDispatcher(path).forward(request, response);
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}
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}
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<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
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<%@ page contentType="text/html" pageEncoding="UTF-8"%>
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>User Data</title>
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</head>
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<body>
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<h2>User Information</h2>
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<p><strong>Name:</strong> ${name}</p>
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<p><strong>Email:</strong> ${email}</p>
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<p><strong>Province:</strong> ${province}</p>
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<p><strong>Country:</strong> ${country}</p>
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</body>
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</html>
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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
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version="3.1">
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<context-param>
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<param-name>province</param-name>
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<param-value>Mendoza</param-value>
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</context-param>
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<context-param>
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<param-name>country</param-name>
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<param-value>Argentina</param-value>
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</context-param>
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</web-app>
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<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
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<%@ page contentType="text/html" pageEncoding="UTF-8"%>
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<!DOCTYPE html>
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<html>
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<head>
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<title>Context and Initialization Servlet Parameters</title>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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</head>
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<body>
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<h2>Please fill the form below:</h2>
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<form action="${pageContext.request.contextPath}/userServlet" method="post">
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<label for="name"><strong>Name:</strong></label>
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<input type="text" name="name" id="name">
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<label for="email"><strong>Email:</strong></label>
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<input type="text" name="email" id="email">
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<input type="submit" value="Send">
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</form>
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</body>
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</html>
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package com.baeldung.test;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import static org.assertj.core.api.Assertions.assertThat;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import static org.mockito.Mockito.atLeast;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.when;
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public class UserServletUnitTest {
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private static HttpServletRequest request;
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private static HttpServletResponse response;
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@BeforeClass
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public static void setUpHttpServletRequestMockInstance() {
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request = mock(HttpServletRequest.class);
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}
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@BeforeClass
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public static void setUpHttpServletResponsetMockInstance() {
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response = mock(HttpServletResponse.class);
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}
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@Test
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public void givenHttpServletRequestMockInstance_whenCalledgetParameter_thenCalledAtLeastOnce() {
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request.getParameter("name");
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verify(request, atLeast(1)).getParameter("name");
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}
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@Test
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public void givenHttpServletRequestMockInstance_whenCalledgetParameter_thenOneAssertion() {
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when(request.getParameter("name")).thenReturn("username");
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assertThat(request.getParameter("name")).isEqualTo("username");
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}
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@Test
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public void givenHttpServletResponseMockInstance_whenCalledgetContentType_thenCalledAtLeastOnce() {
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response.getContentType();
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verify(response, atLeast(1)).getContentType();
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}
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@Test
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public void givenHttpServletResponseMockInstance_whenCalledgetContentType_thenOneAssertion() {
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when(response.getContentType()).thenReturn("text/html");
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assertThat(response.getContentType()).isEqualTo("text/html");
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}
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}
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