Spring MVC表单文本字段
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。
语法
<form:input path="name" />
在这里， path 属性将表单字段绑定到bean属性。
Spring MVC表单标签库还提供了其他输入类型，例如电子邮件，日期，电话，等等。
电子邮件
<form:input type=?email? path="email" />
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。 (mvc + servlet+jstl+jasper)
<!-- 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
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.nhooo;
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
package com.nhooo;
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)
{
//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 object
public String submitForm(@ModelAttribute("reservation") Reservation res)
{
return "confirmation-form";
}
}
4、在web.xml文件中提供控制器的条目
<?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
<?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"> <!-- Provide support for component scanning --> <context:component-scan base-package="com.nhooo" /> <!--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="/WEB-INF/jsp/"></property> <property name="suffix" value=".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="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="Submit" /> </form:form> </body> </html>
注意-通过@ModelAttribute批注传递的值应该与视图页面中存在的modelAttribute值相同。
confirmation-page.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>
标签：String,Spring,org,表单,MVC,Reservation,reservation,public From： https://www.cnblogs.com/cnetsa/p/17060490.html