In Spring MVC, use <form:textarea /> to render a HTML textarea field. For example,
<form:textarea path="address" rows="5" cols="30" />
It will render the following HTML code
<textarea id="address" name="address" rows="5" cols="30"></textarea>
In this tutorial, we show you how to use Spring’s form tag “textarea” to render a HTML textarea to store the “address“. Additionally, add a validator to make sure the texarea is not empty while submitting the form.
1. Controller
A SimpleFormController to handle the form value.
File : TextAreaController.java
package com.mkyong.customer.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import com.mkyong.customer.model.Customer;
public class TextAreaController extends SimpleFormController{
public TextAreaController(){
setCommandClass(Customer.class);
setCommandName("customerForm");
}
@Override
protected ModelAndView onSubmit(HttpServletRequest request,
HttpServletResponse response, Object command, BindException errors)
throws Exception {
Customer customer = (Customer)command;
return new ModelAndView("CustomerSuccess","customer",customer);
}
}
2. Model
A Customer object to store the textarea value.
File : Customer.java
package com.mkyong.customer.model;
public class Customer{
String address;
//getter and setter methods for address
}
3. Form Validator
Create a form validator class and use the ValidationUtils class to make sure the “address” is not empty, Otherwise, get the “required.address” message from the corresponds resource bundle (properties file).
File : CustomerValidator.java
package com.mkyong.customer.validator;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;
import com.mkyong.customer.model.Customer;
public class CustomerValidator implements Validator{
@Override
public boolean supports(Class clazz) {
//just validate the Customer instances
return Customer.class.isAssignableFrom(clazz);
}
@Override
public void validate(Object target, Errors errors) {
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "address",
"required.address", "Field name is required.");
}
}
File : message.properties
required.address = Address is required!
4. View
A JSP page to use the Spring’s form tag “textarea” to render a HTML textarea, and put some CSS styles to highlight the error message.
File : CustomerForm.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<html>
<head>
<style>
.error {
color: #ff0000;
}
.errorblock {
color: #000;
background-color: #ffEEEE;
border: 3px solid #ff0000;
padding: 8px;
margin: 16px;
}
</style>
</head>
<body>
<h2>Spring's form textarea example</h2>
<form:form method="POST" commandName="customerForm">
<form:errors path="*" cssClass="errorblock" element="div" />
<table>
<tr>
<td>Address :</td>
<td><form:textarea path="address" rows="5" cols="30" /></td>
<td><form:errors path="address" cssClass="error" /></td>
</tr>
<tr>
<td colspan="3"><input type="submit" /></td>
</tr>
</table>
</form:form>
</body>
</html>
If the form is submitted, render the successful page and display the submitted textarea value.
File : CustomerSuccess.jsp
<html>
<body>
<h2>Spring's form textarea example</h2>
Address : ${customer.address}
</body>
</html>
5. Spring Bean Configuration
Link it all ~
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean
class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
<bean class="com.mkyong.customer.controller.TextAreaController">
<property name="formView" value="CustomerForm" />
<property name="successView" value="CustomerSuccess" />
<!-- Map a validator -->
<property name="validator">
<bean class="com.mkyong.customer.validator.CustomerValidator" />
</property>
</bean>
<!-- Register the Customer.properties -->
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="message" />
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
6. Demo
Access the page – http://localhost:8080/SpringMVCForm/textarea.htm
If the textarea value is empty while submitting the form, display and highlight the error message.
If the form is submitted successfully, just display the submitted textarea value.
.
how to handle if i wan display html tags with the help of ${customer.address}
lets consider i have ” Washington ” and i want to display it same without rendering.
can we insert default value in between tags?
like Abcdefghijklmnopqrstuvwxyz?
or may be ${xyz.name}?
can we insert default value in between tags?
like Abcdefghijklmnopqrstuvwxyz?
or may be ${xyz.name}
thank you for the example
I get this error message :::
Your article is very good butcher. I have to know more.