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Il pulsante di selezione singola del modulo MVC di Spring ci permette di selezionare una singola opzione. Questa etichetta visualizzerà un etichetta di input HTML di tipo radio.
<form:radiobutton path="abc" value="xyz"/>
Oltre alle etichette di pulsanti di selezione singola, la libreria di etichette dei moduli MVC di Spring include radiobuttons Etichetta. Questa etichetta visualizzerà più etichette di input HTML di tipo radio.
<form:radiobuttons path="abc" items="${xyz}"/>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.1.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>3.0-alpha-1</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-jasper --> <dependency> <groupId>org.apache.tomcat</groupId> <artifactId>tomcat-jasper</artifactId> <version>9.0.12</version> </dependency>
Reservation.java
package com.w3codebox; public class Reservation { private String firstName; private String lastName; private String Gender; public Reservation() { } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getGender() { return Gender; } public void setGender(String gender) { Gender = gender; } }
ReservationController.java
package com.w3codebox; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; @RequestMapping("/reservation") @Controller public class ReservationController { @RequestMapping("/bookingForm") public String bookingForm(Model model) { //creare un oggetto prenotazione Reservation res = new Reservation(); //fornire l'oggetto prenotazione al modello model.addAttribute("reservation", res); return "reservation-page"; } @RequestMapping("/submitForm") public String submitForm(@ModelAttribute("reservation") Reservation res) { return "confirmation-form"; } }
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 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"> <display-name>SpringMVC</display-name> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- Fornire supporto per la scansione dei componenti --> <context:component-scan base-package="com.w3codebox" /> <!-- Fornire supporto per la conversione, la formattazione e la convalida --> <mvc:annotation-driven/> <!-- Definire il risolutore di vista Spring MVC --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
index.jsp
<!DOCTYPE html> <html> <head> <title>Modulo di registrazione ferroviaria</title> </head> <body> <a href="reservation/bookingForm">Clicca qui per la prenotazione.</a> </body> </html>
reservation-page.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <!DOCTYPE html> <html> <head> <title>Modulo di prenotazione</title> </head> <h3>Modulo di prenotazione ferroviaria</h3> <body> <form:form action="submitForm" modelAttribute="reservation"> Nome: <form:input path="firstName" /> <br><br> Cognome: <form:input path="lastName" /> <br><br> Genere: Uomo <form:radiobutton path="Gender" value="Male"/> Femmina <form:radiobutton path="Gender" value="Female"/> <br><br> <input type="submit" value="Invia" /> </form:form> </body> </html>
confirmation-page.jsp
<!DOCTYPE html> <html> <body> <p>La tua prenotazione è stata confermata con successo. Per favore, rivedi i dettagli.</p> Nome: ${reservation.firstName} <br> Cognome: ${reservation.lastName} <br> Genere: ${reservation.gender} </body> </html>
Output: