Java Code Guru Ji (8920128728): Spring MVC Multiple View page Example

Sunday, September 15, 2019

Spring MVC Multiple View page Example

Here, we redirect a view page to another view page.

Let's see the simple example of a Spring Web MVC framework. The steps are as follows:

Load the spring jar files or add dependencies in the case of Maven
Create the controller class
Provide the entry of controller in the web.xml file
Define the bean in the separate XML file
Create the other view components
Start the server and deploy the project

Directory Structure of Spring MVC

1. Add dependencies to pom.xml

 <!-- 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>  

2. Create the request page

Let's create a simple jsp page containing a link.

index.jsp

<html>  
<body>  
<a href="hello">Click here...</a>  
</body>  
</html>  

3. Create the controller class

Let's create a controller class that returns the JSP pages. Here, we pass the specific name with a @Requestmapping annotation to map the class.

HelloController.java

package com.javatpoint;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController {
@RequestMapping("/hello")
public String redirect()
{
return "viewpage";
}
@RequestMapping("/helloagain")
public String display()
{
return "final";
}
}

4. Provide the entry of controller in the web.xml file

web.xml

<?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. Define the bean in the xml file

Now, we also provide view resolver with view component.

Here, the InternalResourceViewResolver class is used for the ViewResolver.

The prefix+string returned by controller+suffix page will be invoked for the view component.

This xml file should be located inside the WEB-INF directory.

spring-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: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.javatpoint" />  
  
    <!--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. Create the other view components

viewpage.jsp

<html>  
<body>  
<a href="helloagain">JavaCodeGuruJi Tutorials</a>  
</body>  
</html>  

final.jsp

<html>  
<body>  
<p>Welcome to Spring MVC Tutorial</p>  
</body>  
</html>  

Output:

Java Code Guru Ji (8920128728)