Now we are going to create a simple Spring mvc example using Maven.
Let's check how it's done.
Step-1 :
First Open the Eclipse IDE. Click New > Maven Project > select an archetype of webapp for Spring mvc project > Enter Group Id, artifact Id > Click Finish.
Step - 2:
You Can Notice an error showing on your project. You have to add your server in to it as follows.
- Right-click on the Project.
- Go to Properties > Targeted Runtimes > Select a Runtime.
- Click Apply and Close.
In my case i'm using Tomcat Server.
Step - 3:
First add dependencies in your pom.xml file.
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.2.RELEASE</version>
</dependency>
</dependencies>
Maven will take the responsibility of downloading all the dependencies. It may take sometime to download all the dependencies.
Step - 4:
Now modify the index.jsp file with the following code.
<html>
<form action="display">
<input type="text" name="t1"/>
<input type="submit"/>
</form>
</body>
</html>
Now create a java file DisplayContainer.java in src/main/java folder. We are creating a java file which is a controller ( @Controller ) and mapping to the index.jsp file using (@RequestMapping("/display")).
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class DisplayController {
@RequestMapping("/display")
public ModelAndView display(@RequestParam("t1") String a){
ModelAndView mv = new ModelAndView();
mv.addObject("res", a);
mv.setViewName("result.jsp")
return mv;
}
}
Create another java class to make Configuration which configures everything which file has to be processed after clicking the submit button.
MyFrontController.java :
import org.springframework.web.servlet.support.AbstractAnnotation ConfigDispatcherServletInitializer
public class MyFrontController extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] {MvcConfig.class};
}
@Override
protected Class<?>[] getServletConfigClasses() {
return null;
}
@Override
protected String[] getServletMappings() {
return new String[] {"/"};
}
}
MvcConfig.java :
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@EnableWebMvc
@Configuration
@ComponentScan({"com.springmvc"})
public class MvcConfig {
}
result.jsp :
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" isELIgnored="false"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Result Page</title>
</head>
<body>
Hello ${res}
</body>
</html>
Step - 5 :
At last, run the index.jsp file using server whatever you like to work with.
