Spring4 MVC WebFlow Basic3 Project

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This is index.html JSP file and it is used display the output for the application.



<!DOCTYPE html>

<html>

<head>

<meta charset="ISO-8859-1">

<title>Insert title here</title>

</head>

<body>


<a href="/loginFlow">click here to login</a>


</body>

</html>




This is create_new_account.jsp JSP file and it is used display the output for the application.


<%@ page isELIgnored="false"%>


<html xmlns:form="http://www.springframework.org/tags/form">


<body>

	<form action="${flowExecutionUrl}&_eventId=accountInformationEntered" method="post">


		<input type="hidden" name="_flowExecutionKey"

			value="${flowExecutionKey}" /> <br /> <br /> Use any

		other login name and password for login error. <br /> <br />

		<table>

			<tr>

				<td>New Login Name:</td>

				<td><input type="text" name="loginName" /></td>

			</tr>

			<tr>

				<td>Enter Password:</td>

				<td><input type="text" name="password" /></td>

			</tr>

		</table>


		<br /> <input type="submit" value="Submit" />


	</form>

</body>

</html>




This is display_login.jsp JSP file and it is used display the output for the application.


<%@ page isELIgnored="false"%>


<html xmlns:form="http://www.springframework.org/tags/form">


<body>

	<form action="${flowExecutionUrl}&_eventId=loginCredentialsEntered"

		method="post">



		<input type="hidden" name="_flowExecutionKey"

			value="${flowExecutionKey}" /> <br /> Enter login name as <b>Chandra</b>

		and password as <b>password</b> for successful login. <br /> Use any

		other login name and password for login error. <br /> <br />

		<table>

			<tr>

				<td>Login Name:</td>

				<td><input type="text" name="loginName" /></td>

			</tr>

			<tr>

				<td>Password:</td>

				<td><input type="text" name="password" /></td>

			</tr>

			<%-- <tr>

				<td>Name Given subflow:</td>

				<td><%=request.getParameter("name")%></td>

			</tr> --%>

		</table>


		<br /> <input type="submit" value="Login" />


	</form>


	<a href="${flowExecutionUrl}&_eventId=createNewAccountRequested">Create

		New Account</a>

</body>

</html>




This is display_login_error.jsp JSP file and it is used display the output for the application.


<html>

<body>

Your login credentials are incorrect.

<br/>

<br/>

<a href="./loginFlow">Go back to login page</a>

</body>

</html>




This is display_login_success.jsp JSP file and it is used display the output for the application.


<%@page import="com.cv.spring.webflow.*" %>


<html>

<body>

You have successfully logged in!!!

<br/>

<br/>


<% %> 

<a href="./loginFlow">Go back to login page</a>


</body>

</html>









This is InvalidCredentialsException.java file having the source code to execute business logic.




  
  








 

    
package com.cv.spring.webflow;

/**

 * @author Chandra Vardhan

 */

public class InvalidCredentialsException extends Exception{



  @Override

  public String getMessage() {

    return super.getMessage();

  }



  @Override

  public synchronized Throwable getCause() {

    return super.getCause();

  }



  @Override

  public StackTraceElement[] getStackTrace() {

    return super.getStackTrace();

  } 

 

}

    












This is LoginService.java file having the service/business logic to call the DAO layer and get the information from database.




  
  








 

    
package com.cv.spring.webflow;



import org.apache.log4j.Logger;



/**

 * @author Chandra Vardhan

 */

public class LoginService {

  

  private final static Logger LOGGER = Logger.getLogger(LoginService.class);

  

  public String performLogin(User user) throws InvalidCredentialsException {

    LOGGER.info("In LoginService.performLogin(-) method !!!");

    if (user != null) {

      String loginName = user.getLoginName();

      String password = user.getPassword();

      LOGGER.info("Entered credentials are, username = "+loginName + "and password = "+password);

      if (loginName != null

          && loginName.trim().equalsIgnoreCase("Chandra")

          && password != null

          && password.trim().equalsIgnoreCase("password")) {

        LOGGER.info("User successfully logged in, Credentials are correct!!!");

        // user successfully logged in

        return "success";

      } else {

        LOGGER.info("User failed logged in, Credentials are wrong!!!");

        LOGGER.info("Enter credentials as, username = Chandra and password = password");

        throw new InvalidCredentialsException();

      }

    } else {

      throw new InvalidCredentialsException();

    }

  }



  

  public String createNewAccount(User user) throws InvalidCredentialsException {

    if (user != null) {

      String loginName = user.getLoginName();

      String password = user.getPassword();

      LOGGER.info("Entered credentials are, username = "+loginName + "and password = "+password);

      if (loginName != null

          && loginName.trim().equalsIgnoreCase("Chandra")

          && password != null

          && password.trim().equalsIgnoreCase("password")) {

        // user successfully logged in

        LOGGER.info("User successfully logged in, Credentials are correct!!!");

        return "success";

      } else {

        LOGGER.info("User failed logged in, Credentials are wrong!!!");

      LOGGER.info("Enter credentials as, username = Chandra and password = password");

        throw new InvalidCredentialsException();

      }

    } else {

      throw new InvalidCredentialsException();

    }

  }



}

    












This is User.java file having the source code to execute business logic.




  
  








 

    
package com.cv.spring.webflow;



import java.io.Serializable;

/**

 * @author Chandra Vardhan

 */

public class User implements Serializable {



  private String loginName;

  private String password;



  public String getLoginName() {

    return loginName;

  }



  public void setLoginName(String loginName) {

    this.loginName = loginName;

  }



  public String getPassword() {

    return password;

  }



  public void setPassword(String password) {

    this.password = password;

  }



}

    




























This is pom.xml file having the entries of dependency jars and information to build the application .

	
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">.0" encoding="UTF-8"?>

	<modelVersion>4.0.0</modelVersion>
	<groupId>com.cv.spring.annotation</groupId>
	<artifactId>Spring4MVCWebFlowBasic3</artifactId>
	<name>Spring4MVCWebFlowBasic3</name>
	<packaging>war</packaging>
	<version>1.0</version>
	<properties>
		<java-version>1.8</java-version>
		<log4j-version>1.2.16</log4j-version>
		<org.springframework-version>4.2.0.RELEASE</org.springframework-version>
	</properties>
	<dependencies>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>${log4j.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.webflow</groupId>
			<artifactId>spring-webflow</artifactId>
			<version>2.4.2.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>

	</dependencies>

	<build>
		<pluginManagement>

			<plugins>
				<plugin>
					<groupId>org.apache.maven.plugins</groupId>
					<artifactId>maven-compiler-plugin</artifactId>
					<version>3.1</version>
					<configuration>
						<source>1.8</source>
						<target>1.8</target>
					</configuration>
				</plugin>
				<plugin>
					<groupId>org.apache.maven.plugins</groupId>
					<artifactId>maven-war-plugin</artifactId>
					<version>2.4</version>
					<configuration>
						<warSourceDirectory>src/main/webapp</warSourceDirectory>
						<warName>Spring4MVCWebFlowBasic3</warName>
						<failOnMissingWebXml>false</failOnMissingWebXml>
					</configuration>
				</plugin>
			</plugins>
		</pluginManagement>
	</build>

</project>







This is login-flow.xml file having the spring configuration properties.

 
<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/webflow
http://www.springframework.org/schema/webflow/spring-webflow-2.4.xsd">
	<!-- Display the login page -->
	<var name="user" class="com.cv.spring.webflow.User" />
	<!-- Display the login page -->
	<view-state id="displayLoginView" view="/WEB-INF/views/display_login.jsp"
		model="user">
		<transition on="loginCredentialsEntered" to="performLoginAction" />
		<transition on="createNewAccountRequested" to="createNewAccountSubFlowState" />
	</view-state>
	<subflow-state id="createNewAccountSubFlowState" subflow="createNewAccountFlow">
		<transition on="newAccountCreated" to="createNewAccountLoginAction" />
	</subflow-state>
	<action-state id="performLoginAction">
		<evaluate expression="loginService.performLogin(user)" />
		<transition to="displayLoginSuccessView" />
		<transition on-exception="com.cv.spring.webflow.InvalidCredentialsException"
			to="displayLoginErrorView" />
	</action-state>
	
	<action-state id="performFailureAction">
		<evaluate expression="loginService.actionForFailure()" />
		<transition on-exception="com.cv.spring.webflow.InvalidCredentialsException"
			to="displayLoginErrorView" />
	</action-state>
	<action-state id="createNewAccountLoginAction">
		<evaluate expression="loginService.createNewAccount(user)" />
		<transition to="displayLoginSuccessView" />
		<transition on-exception="com.cv.spring.webflow.InvalidCredentialsException"
			to="displayLoginErrorView" />
	</action-state>
	<view-state id="displayLoginSuccessView" view="/WEB-INF/views/display_login_success.jsp" />
	<view-state id="displayLoginErrorView" view="/WEB-INF/views/display_login_error.jsp" />
	
	
</flow>



This is login-servlet-config.xml file having the spring configuration properties.

 
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-4.0.xsd">
	<mvc:annotation-driven />
	<context:component-scan base-package="com.cv.spring.webflow" />
	<!--Define FlowHandlerMapping to tell DispatcherServlet (in web.xml) to 
		send flow requests to Spring Web Flow -->
	<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
		<property name="flowRegistry" ref="loginFlowRegistry" />
	</bean>
	<!-- Define FlowHandlerAdapter to handle Spring Web Flow request call. This 
		is the Controller class in Spring Web Flow -->
	<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
		<property name="flowExecutor" ref="loginFlowExecutor" />
	</bean>
</beans>



This is login-webflow-config.xml file having the spring configuration properties.

 
<?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:flow="http://www.springframework.org/schema/webflow-config"
	xsi:schemaLocation="http://www.springframework.org/schema/webflow-config
http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
	<!-- Define the flow executor responsible for executing login web flow -->
	<flow:flow-executor id="loginFlowExecutor"
		flow-registry="loginFlowRegistry" />
	
	<!-- Define the registry that holds references to all the flow related XML 
		configuration -->
	<flow:flow-registry id="loginFlowRegistry">
		<flow:flow-location id="loginFlow"
			path="/WEB-INF/flows/login-flow.xml" />
		<flow:flow-location id="createNewAccountFlow"
			path="/WEB-INF/flows/new_flow.xml" />
	</flow:flow-registry>

	
</beans>



This is new_flow.xml file having the spring configuration properties.

 
<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/webflow
http://www.springframework.org/schema/webflow/spring-webflow-2.4.xsd"
	start-state="createNewAccountView">
	<var name="user" class="com.cv.spring.webflow.User" />
	<!-- Display the login page -->
	<view-state id="createNewAccountView" view="/WEB-INF/views/create_new_account.jsp"
		model="user">
		<transition on="accountInformationEntered" to="createNewAccountAction" />
	</view-state>
	<action-state id="createNewAccountAction">
		<evaluate expression="loginService.createNewAccount(user)" />
		<transition to="newAccountCreated" />
		<transition on-exception="com.cv.spring.webflow.InvalidCredentialsException"
			to="displayLoginErrorView" />
	</action-state>

	<view-state id="newAccountCreated" view="/WEB-INF/views/display_login_success.jsp" />
	<view-state id="displayLoginErrorView" view="/WEB-INF/views/display_login_error.jsp" />

</flow>



This is spring-config.xml file having the spring configuration properties.

 
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd">
	<bean id="loginService" class="com.cv.spring.webflow.LoginService" />
</beans>








This is web.xml deployment descriptor file and it describes how the web application should be deployed.

	
<?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_2_5.xsd"
	version="2.5">
	<display-name>Spring Web Flow</display-name>
	<servlet>
		<servlet-name>login</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>
		/WEB-INF/flows/login-servlet-config.xml
		/WEB-INF/flows/login-webflow-config.xml
		/WEB-INF/flows/spring-config.xml
			</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>login</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>
</web-app>













This is log4j.properties file having the entries for logging the information into the console/file. 


#By default enabling Console appender
# Root logger option
log4j.rootLogger=INFO, stdout

# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%-5p [%c]:%L -->> %m%n

# Redirect log messages to a log file
#log4j.appender.file=org.apache.log4j.RollingFileAppender
#log4j.appender.file.File=C:\servlet-application.log
#log4j.appender.file.MaxFileSize=5MB
#log4j.appender.file.MaxBackupIndex=10
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n












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