JarCastingspring-security-token-filter 
Token authentication for Spring Security applications.
Usage
Add the Spring Boot starter project to your classpath:
repositories {
mavenCentral()
}
dependencies {
compile 'org.visola.spring.security:spring-security-token-filter-spring-boot-starter:1.1'
}
Add TokenAuthenticationFilter filter to your filter chain, like the following:
// Imports omitted
@Configuration
@EnableWebSecurity
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
/**
* The starter bundle will provide a TokenAuthenticationFilter for you.
*/
@Autowired
private TokenAuthenticationFilter tokenAuthenticationFilter;
@Override
protected void configure(HttpSecurity http) throws Exception {
// This will make your app completely stateless
http.csrf().disable()
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
// Add the TokenAuthenticationFilter to your filter chain
http.addFilterBefore(tokenAuthenticationFilter, BasicAuthenticationFilter.class);
// More HttpSecurity configuration here
}
}
Not using Spring Boot?
Add the starter project as a dependency, then you just need to load the JWTFilterConfiguration configuration.
JWT
If you don't know what JWT is, you should read about it first at http://jwt.io/.
If you're using Spring Boot and have the starter in your classpath, this will be taken care for you automatically.
To make your life easier, this library has a TokenService implementation that works out of the box with the JWT specification using the Nimbus JOSE + JWT implementation. To use it you just need to register the JwtTokenService which uses an interface (AuthenticationJwtClaimsSetTransformer) to map between JWT claims set to Spring Security Authentication. The following sample code is using the default (out-of-the-box) implementation:
@Bean
public TokenService tokenService() throws JOSEException {
return new JwtTokenService(claimsSetTransformer(), secret);
}
@Bean
public AuthenticationJwtClaimsSetTransformer claimsSetTransformer() {
// How long will your token last and the prefix for roles
return new UsernamePasswordAuthenticationTokenJwtClaimsSetTransformer(TimeUnit.HOURS.toMillis(8), Optional.of("ROLE_"));
}
So what happens when a user logs in?
You need to create a token and give it back to the user somehow.