Spring MVC表单文本字段用法示例 _SpringMVC

Spring MVC表单文本字段标签使用绑定值生成HTML输入标签。默认情况下, 输入标签的类型是文本。
句法

< form:input path="name" />

在这里, path属性将form字段绑定到bean属性。
Spring MVC表单标签库还提供其他输入类型, 例如电子邮件, 日期, 电话等。
对于电子邮件：

< form:input type=?email? path="email" />

对于日期：

< form:input type=?date? path="date" />

Spring MVC表单文本字段的示例让我们看一个使用表单标签库创建铁路预订表单的示例。
1.将依赖项添加到pom.xml文件。

< !-- 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>

2.创建bean类
【Spring MVC表单文本字段用法示例】在这里, bean类包含与表单中存在的输入字段相对应的变量(以及setter和getter方法)。
Reservation.java

package com.srcmini; public class Reservation { private String firstName; private String lastName; 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; } }

3.创建控制器类
ReservationController.java

package com.srcmini; 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")@Controllerpublic class ReservationController { @RequestMapping("/bookingForm")public String bookingForm(Model model){//create a reservation object Reservation res=new Reservation(); //provide reservation object to the model model.addAttribute("reservation", res); return "reservation-page"; }@RequestMapping("/submitForm")// @ModelAttribute binds form data to the objectpublic String submitForm(@ModelAttribute("reservation") Reservation res){ return "confirmation-form"; }}

4.在web.xml文件中提供控制器的条目
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>

5.在xml文件中定义bean
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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"> < !-- Provide support for component scanning --> < context:component-scan base-package="com.srcmini" /> < !--Provide support for conversion, formatting and validation --> < mvc:annotation-driven/> < !-- Define Spring MVC view resolver --> < bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> < property name="prefix" value="http://www.srcmini.com/WEB-INF/jsp/"> < /property> < property name="suffix" value="http://www.srcmini.com/.jsp"> < /property> < /bean> < /beans>

6.创建请求的页面
index.jsp

< !DOCTYPE html> < html> < head> < title> Railway Registration Form< /title> < /head> < body> < a href="http://www.srcmini.com/reservation/bookingForm"> Click here for reservation.< /a> < /body> < /html>

7.创建其他视图组件
Reservation-page.jsp

< %@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> < !DOCTYPE html> < html> < head> < title> Reservation Form< /title> < /head> < h3> Railway Reservation Form< /h3> < body> < form:form action="submitForm" modelAttribute="reservation"> First name: < form:input path="firstName" /> < br> < br> Last name: < form:input path="lastName" /> < br> < br> < input type="submit" value="http://www.srcmini.com/Submit" /> < /form:form> < /body> < /html>

注-通过@ModelAttribute批注传递的值应与视图页面中存在的modelAttribute值相同。
确认页面.jsp

< !DOCTYPE html> < html> < body> < p> Your reservation is confirmed successfully. Please, re-check the details.< /p> First Name : ${reservation.firstName} < br> Last Name : ${reservation.lastName}< /body> < /html>

输出