Step 1: Set Up Your Project
Create a new web project or use an existing one. Make sure you have the required dependencies for Spring and Struts 2 in your project’s build file (e.g., Maven or Gradle).
Set up Spring configuration for your application. Define beans for services, DAOs, and any other components. For this example, we’ll create a UserService and a simple User class. Here’s an example Spring configuration file (spring-config.xml):
<!-- Define your Spring beans here -->
<bean id="userService"
class="com.example.UserService">
<!-- Configure properties and dependencies -->
</bean>
Step 3: Configure Struts 2
Create a struts.xml configuration file to define your Struts 2 actions and interceptors. You’ll also need to configure the Spring integration. Here’s an example:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache
Software Foundation//DTD Struts Configuration
2.5//EN" "http://struts.apache
.org/dtds/struts-2.5.dtd">
<struts>
<constant name="struts.devMode" value="true" />
<!-- Configure Spring integration -->
<constant name="struts.objectFactory"
value="spring" />
<!-- Define your Struts 2 actions -->
<package name="default"
extends="struts-default">
<action name="login"
class="com.example.LoginAction">
<result name="success">
/welcome.jsp</result>
<result name="error">
/login.jsp</result>
</action>
</package>
</struts>
Step 4: Create a Login Action
Create a Struts 2 action class for login. This class will interact with the Spring-managed UserService to authenticate the user. Here’s an example of a LoginAction class:
import com.opensymphony.xwork2.ActionSupport;
public class LoginAction extends ActionSupport {
private UserService userService;
private String username;
private String password;
// Inject the
UserService via setter injection
public void setUserService
(UserService userService) {
this.userService = userService;
}
// Getter and setter methods for
username and password
public String execute() {
// Perform authentication using
the userService
if (userService.authenticate(username,
password)) {
return SUCCESS;
} else {
addActionError("Invalid username or
password");
return ERROR;
}
}
}
Step 5: Create JSP Views
Create JSP views for the login page (login.jsp) and the welcome page (welcome.jsp). These views will be used to display the login form and the welcome message.
Deploy your web application to a servlet container (e.g., Tomcat) and access it through the configured URLs. The LoginAction will handle user authentication using the Spring-managed UserService.
Ensure you have both Spring and Struts 2 libraries in your project’s classpath. This example demonstrates the integration of Spring and Struts 2 for a simple login functionality. You can expand upon this by adding more features like user registration, session management, and role-based access control as needed for your application.
