Check out example codes for "spring security after login redirect". It will help you in understanding the concepts better.

Code Example 1

@Configuration
	@EnableWebSecurity
	public class SecSecurityConfig extends WebSecurityConfigurerAdapter {
	 
	    @Override
	    protected void configure(final HttpSecurity http) throws Exception {
	        http
	            .authorizeRequests()
	            // ... endpoints
	            .formLogin()
	                .loginPage("/login.html")
	                .loginProcessingUrl("/login")
	                .defaultSuccessUrl("/homepage.html", true)
	            // ... other configuration       
	    }
	}

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