Spring MVC Example – Simple Form Handling:
Let us see an example of Spring MVC (form handling method). This application is tested using NetBeans.
Files to be Created:
Login.jsp
success.jsp
employeeLogin.java
employeeController.java
Structure:
Login.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="s" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login Page</title>
</head>
<body>
<s:form name="login" method="post">
<table>
<tr>
<td> Username </td>
<td> <input type="text" name="ename"> </td>
</tr>
<tr>
<td> Password </td>
<td> <input type="password" name="epassword"> </td>
</tr>
<tr>
<td colspan="2"> <input type="submit" name="Login"> </td>
</tr>
</table>
<p><span style="color:red">${error}</span></p>
</s:form>
</body>
</html>
success.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Success</title>
</head>
<body>
<h1>Welcome ${username}, You have successfully Logged-in!</h1>
</body>
</html>
employeeController.java
package com;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping(value="/Login.htm")
public class employeeController {
@RequestMapping(method = RequestMethod.GET)
public String method1(ModelMap modelmap)
{
modelmap.put("Welcome", "This is spring mvc");
return "Login";
}
@RequestMapping(method = RequestMethod.POST)
public String access(@ModelAttribute ("employeeLogin")employeeLogin emplogin, ModelMap modelmap)
{
if(emplogin.getEname().equals("Alpha")&&emplogin.getEpassword().equals("123456"))
{
modelmap.addAttribute("username", emplogin.getEname());
return "success";
}
else
{
modelmap.put("error", "Invalid Credentials");
return "Login";
}
}
}
employeeLogin.java
public class employeeLogin {
String ename;
String epassword;
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public String getEpassword() {
return epassword;
}
public void setEpassword(String epassword) {
this.epassword = epassword;
}
}
applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
</beans>
dispatcher-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
">
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<!--
Most controllers will use the ControllerClassNameHandlerMapping above, but
for the index controller we are using ParameterizableViewController, so we must
define an explicit mapping for it.
-->
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="index.htm">indexController</prop>
</props>
</property>
</bean>
<context:component-scan base-package="com" />
<mvc:annotation-driven />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
<!--
The index controller.
-->
<bean name="indexController"
class="org.springframework.web.servlet.mvc.ParameterizableViewController"
p:viewName="index" />
</beans>
Output:
[…] Let us see an example code today for Spring MVC that has multiple submit buttons in one form. This is Second spring mvc tutotial. (Spring MVC example1 is here). […]
[…] the same way we use in Servlets. (for Spring mvc simple form handling example-click here and for Multiple submit buttons in spring mvc form – click […]