Java 如何从数据输入字段获取密码？

网站安全配置类

    public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
        @Autowired
        private UserService userSevice;

        @Autowired
        private PasswordEncoder passwordEncoder;

        @Bean
        public PasswordEncoder getPasswordEncoder() {
            return new BCryptPasswordEncoder(8);
        }

        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http
                    .authorizeRequests()
                    .antMatchers("/", "/registration", "/static/**", "/about").permitAll()
                    .anyRequest().authenticated()
                    .and()
                    .formLogin()
                    .loginPage("/login")
                    .permitAll()
                    .and()
                    .logout()
                    .permitAll();
        }

        @Override
        protected void configure(AuthenticationManagerBuilder auth) throws Exception {
            auth.userDetailsService(userSevice)
                    .passwordEncoder(passwordEncoder);


        }

    }

    public class UserService implements UserDetailsService  {
        @Autowired
        private UserRepo userRepo;

        @Override
        public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
            User user = userRepo.findByUsername(username);
            System.out.println(username);

            if (user == null) {
                throw new UsernameNotFoundException("User not found");
            }

            return user;
        }
 }

用户服务类

    public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
        @Autowired
        private UserService userSevice;

        @Autowired
        private PasswordEncoder passwordEncoder;

        @Bean
        public PasswordEncoder getPasswordEncoder() {
            return new BCryptPasswordEncoder(8);
        }

        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http
                    .authorizeRequests()
                    .antMatchers("/", "/registration", "/static/**", "/about").permitAll()
                    .anyRequest().authenticated()
                    .and()
                    .formLogin()
                    .loginPage("/login")
                    .permitAll()
                    .and()
                    .logout()
                    .permitAll();
        }

        @Override
        protected void configure(AuthenticationManagerBuilder auth) throws Exception {
            auth.userDetailsService(userSevice)
                    .passwordEncoder(passwordEncoder);


        }

    }

    public class UserService implements UserDetailsService  {
        @Autowired
        private UserRepo userRepo;

        @Override
        public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
            User user = userRepo.findByUsername(username);
            System.out.println(username);

            if (user == null) {
                throw new UsernameNotFoundException("User not found");
            }

            return user;
        }
 }

---

UserDetailsService

只显示用户名，但我希望它能让我看到输入的密码，我输入了

system.out.printl（username）

进行验证，它会显示出来，我不知道如何输出密码。它们来自数据库。提前谢谢。对不起，我的英语很差，所以，本质上，您需要的是通过客户端从AuthenticationManagerBuilder的auth对象发送的密码。如果是，这将不可能，因为密码存储在不可逆散列中
如果要从DB获取密码，可以调用

user.getPassword（）