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spring security form based authentication example


Spring security

Spring security is a flexible and powerful authentication and authorization framework to create secure J2EE-based Enterprise Applications.

Authentication: It is a process or action of verifying the identity of a user or process i.e. who are you?

Authorization: It is a process of checking the authority of a user to perform actions in the application i.e. what are you allowed to do?

Spring security form based authentication example

As we discussed in our earlier examples that Spring Security will create a default login form automatically and we do not have to create any new jsp page. But we can create our custom login page with form.

Directory Structure

Spring security

pom.xml file

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>codesjava</groupId>
  <artifactId>SpringSecurity03</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>SpringSecurityld Maven Webapp</name>
  <url>http://maven.apache.org</url>
 
  <properties>
  	<spring.version>5.0.2.RELEASE</spring.version>
  	<spring.security.version>5.0.0.RELEASE</spring.security.version>
  	<jstl.version>1.2</jstl.version>
  </properties>
 
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- Spring dependencies -->
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-core</artifactId>
		<version>${spring.version}</version>
	</dependency>
 
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-web</artifactId>
		<version>${spring.version}</version>
	</dependency>
 
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-webmvc</artifactId>
		<version>${spring.version}</version>
	</dependency>
 
	<!-- Spring Security -->
	<dependency>
		<groupId>org.springframework.security</groupId>
		<artifactId>spring-security-web</artifactId>
		<version>${spring.security.version}</version>
	</dependency>
 
	<dependency>
		<groupId>org.springframework.security</groupId>
		<artifactId>spring-security-config</artifactId>
		<version>${spring.security.version}</version>
	</dependency>
 
	<!-- jstl for jsp page -->
	<dependency>
		<groupId>jstl</groupId>
		<artifactId>jstl</artifactId>
		<version>${jstl.version}</version>
	</dependency>
 
	<!-- Servlet API -->
	<dependency>  
	    <groupId>javax.servlet</groupId>  
	    <artifactId>javax.servlet-api</artifactId>  
	    <version>3.1.0</version>  
	    <scope>provided</scope>  
	</dependency>  
  </dependencies>
 
  <build>  
    <plugins>  
    	<plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.7.0</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>2.6</version>  
            <configuration>  
                <failOnMissingWebXml>false</failOnMissingWebXml>  
            </configuration>  
        </plugin>  
    </plugins>  
</build>  
</project>

AppConfig.java

package com.codesjava.config;
 
import org.springframework.context.annotation.Bean;  
import org.springframework.context.annotation.ComponentScan;  
import org.springframework.context.annotation.Configuration;  
import org.springframework.web.servlet.config.annotation.EnableWebMvc;  
import org.springframework.web.servlet.view.InternalResourceViewResolver;  
import org.springframework.web.servlet.view.JstlView;  
 
@EnableWebMvc  
@Configuration  
@ComponentScan({ "com.codesjava.controller.*" })  
public class AppConfig {  
    @Bean  
    public InternalResourceViewResolver viewResolver() {  
        InternalResourceViewResolver viewResolver  
                          = new InternalResourceViewResolver();  
        viewResolver.setViewClass(JstlView.class);  
        viewResolver.setPrefix("/WEB-INF/views/");  
        viewResolver.setSuffix(".jsp");  
        return viewResolver;  
    }  
}

SecurityConfig.java

Spring security configuration file. It will contains the security configurations. It creates a springSecurityFilterChain which is a servlet filter.

package com.codesjava.config;
 
import org.springframework.context.annotation.*;   
import org.springframework.security.config.annotation.web.builders.HttpSecurity;  
import org.springframework.security.config.annotation.web.configuration.*;  
import org.springframework.security.core.userdetails.User;  
import org.springframework.security.core.userdetails.UserDetailsService;  
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;  
 
@EnableWebSecurity
@ComponentScan("com.codesjava") 
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Bean  
    public UserDetailsService userDetailsService() {  
        InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager();  
        manager.createUser(User.withDefaultPasswordEncoder()  
        .username("jai").password("123456").roles("ADMIN").build());  
        return manager;  
    }  
 
	@Override
	protected void configure(HttpSecurity http) throws Exception {
	     http.authorizeRequests().  
	      antMatchers("/index","/").permitAll()  
	      .antMatchers("/admin").authenticated()  
	      .and()  
	      .formLogin()  
	      .loginPage("/login")  
	      .and()  
	      .logout()  
	      .logoutRequestMatcher(new AntPathRequestMatcher("/logout"));  		
	}
}

SpringSecurityInitializer.java

Now we have to create a class which extends AbstractSecurityWebApplicationInitializer, it will load the springSecurityFilterChain automatically.

package com.codesjava.config.core;
 
import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;
 
public class SpringSecurityInitializer  extends AbstractSecurityWebApplicationInitializer{
 
}

SpringMvcInitializer.java

It is initializer class which will load everything.

package com.codesjava.config.core;
 
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import com.codesjava.config.SecurityConfig;
 
public class SpringMvcInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
	@Override
	protected Class<?>[] getRootConfigClasses() {
		return new Class[] { SecurityConfig.class };
	}
 
	@Override
	protected Class<?>[] getServletConfigClasses() {
		// TODO Auto-generated method stub
		return null;
	}
 
	@Override
	protected String[] getServletMappings() {
		return new String[] { "/" };
	}
}

LoginController.java

package com.codesjava.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
 
@SuppressWarnings("unused")
@Controller
public class LoginController {
    @RequestMapping(value="/", method=RequestMethod.GET)    
    public String index() {    	            
        return "index";    
    }   
 
    @RequestMapping(value="/login", method=RequestMethod.GET)    
    public String login() {    	            
        return "login";    
    }    
 
    @RequestMapping(value="/admin", method=RequestMethod.GET)    
    public String admin() {    	            
        return "admin";    
    }    
}

index.jsp file

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@page session="true"%>
<html>
<body>
	<h2>Spring MVC + Spring Security</h2>	
	<a href="admin">Login here</a>	
</body>
</html>

login.jsp file

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>  
<c:url value="/login" var="loginUrl"/>  
<form action="${loginUrl}" method="post">         
    <c:if test="${param.error != null}">          
        <p>  
            Invalid username and password.  
        </p>  
    </c:if>  
    <c:if test="${param.logout != null}">         
        <p>  
            You have been logged out.  
        </p>  
    </c:if>  
    <p>  
        <label for="username">Username</label>  
        <input type="text" id="username" name="username"/>      
    </p>  
    <p>  
        <label for="password">Password</label>  
        <input type="password" id="password" name="password"/>      
    </p>  
    <input type="hidden"                          
        name="${_csrf.parameterName}"  
        value="${_csrf.token}"/>  
    <button type="submit" class="btn">Login</button>  
</form>

admin.jsp file

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@page session="true"%>
<html>
<body>
	<h2>Spring MVC + Spring Security</h2>	
	<h3>Admin login successfully.</h3>	
	<a href="logout">Logout</a>
</body>
</html>

Run the application on server.
We add spring security on admin page, so when we hit http://localhost:8080/SpringSecurity03/. Browser will open index page.
Spring security

Click on Login here link. Custom login page will open.
Spring security

Enter credentials and click on login
Spring security

Successfully login
Spring security

Click on logout
Spring security



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