spring security custom form login code example

Example 1: spring security custom login form annotation example

<properties>
        <failOnMissingWebXml>false</failOnMissingWebXml>
        <spring.version>5.2.0.RELEASE</spring.version>
</properties> 
 
<!-- Spring MVC Dependency -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${spring.version}</version>
</dependency>
 
<!-- Spring Security Core -->
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-core</artifactId>
    <version>${spring.version}</version>
</dependency>
 
<!-- Spring Security Config -->
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-config</artifactId>
    <version>${spring.version}</version>
</dependency>
 
<!-- Spring Security Web -->
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-web</artifactId>
    <version>${spring.version}</version>
</dependency>

Example 2: spring security custom login form annotation example

package com.howtodoinjava.demo.spring.config;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
 
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Autowired
    PasswordEncoder passwordEncoder;
 
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
        .passwordEncoder(passwordEncoder)
        .withUser("user").password(passwordEncoder.encode("123456")).roles("USER")
        .and()
        .withUser("admin").password(passwordEncoder.encode("123456")).roles("USER", "ADMIN");
    }
 
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
        .antMatchers("/login")
            .permitAll()
        .antMatchers("/**")
            .hasAnyRole("ADMIN", "USER")
        .and()
            .formLogin()
            .loginPage("/login")
            .defaultSuccessUrl("/home")
            .failureUrl("/login?error=true")
            .permitAll()
        .and()
            .logout()
            .logoutSuccessUrl("/login?logout=true")
            .invalidateHttpSession(true)
            .permitAll()
        .and()
            .csrf()
            .disable();
    }
}