Spring : MultiActionController Example

Sunday, July 1, 2012

Spring : MultiActionController Example

Lets create a webproject in My Eclipse (lets say MultiActionController). Now we will add spring Capabilities to it. Here we are using Spring 3.0

(Right click on project) -> My Eclipse -> Add Spring Capabilities..

Adding below libraries (as shown in below image)

Spring 3.0 Core Libraries
Spring 3.0 Web Libraries

Now lets modify web.xml. Adding dispatcher servlet (lets say javaxp)

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<description>Spring MVC Dispatcher Servlet</description>
<servlet-name>javaxp</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>javaxp</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>

javaxp-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:p="http://www.springframework.org/schema/p"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

</property>

</property>

</bean>

</bean>

</bean>

</beans>

ApplicationController.java

/* ApplicationController.java */

package com.javaxp.controller;

import java.util.ArrayList;
import java.util.Hashtable;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.ui.ModelMap;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

public class ApplicationController extends MultiActionController {

public ModelAndView loadHomePage(HttpServletRequest req,
HttpServletResponse resp) {

System.out.println("Inside ApplicationController.java > loadHomePage() >>");

ModelAndView mvObject = null;

//Lets see how we can pass various object using ModelMap
String message = "This is a String message passed via ModelMap";

ArrayList<String> city = new ArrayList<String>();
city.add("Delhi");
city.add("Mumbai");
city.add("Pune");

Hashtable<String,String> employee = new Hashtable<String,String>();
employee.put("001", "Ram");
employee.put("002", "Shyam");
employee.put("003", "Geeta");

//adding all objects in a ModelMap
ModelMap dataMap = new ModelMap();
dataMap.put("message", message);
dataMap.put("city", city);
dataMap.put("employee", employee);

mvObject = new ModelAndView("home","data",dataMap);

return mvObject;
}
}

home.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<h2>This is home page</h2>

${data.message}
<hr/>
ArrayList of city
<br/>
<c:forEach items="${data.city}" var="city">
${city} <br/>
</c:forEach>
<hr/>
Hashtable of employee
<br/>
<c:forEach items="${data.employee}" var="employee">
${employee.key} ${employee.value} <br/>
</c:forEach>

Lets see the files structure created so far

Output

Now got to http://localhost:8080/MultiActionController/load.do and you should see below screen. Note /load.do which is your controller mapping in dispatcher-servlet.

Pages

Sunday, July 1, 2012

Spring : MultiActionController Example