Spring MVC textarea example
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.
Download Source Code
About Author
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}
.
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.
thank you for the example
I get this error message :::
Your article is very good butcher. I have to know more.