Spring Framework -在哪里解析自定义声明的JWT？

@Configuration
public class JwtConfig {

    @Bean
    public JwtDecoder jwtDecoder() {
        return new MyJwtDecoder();
    }

    private static class MyJwtDecoder implements JwtDecoder {
        @Override
        public Jwt decode(String token) throws JwtException {
            // 使用第三方库解析JWT，并提取自定义声明
            // ...
            return jwt;
        }
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtDecoder jwtDecoder;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/api/**").authenticated()
            .anyRequest().permitAll()
            .and()
            .oauth2ResourceServer()
            .jwt()
            .jwtDecoder(jwtDecoder);
    }
}

@RestController
public class MyController {

    @GetMapping("/api/user")
    public String getUserInfo(@AuthenticationPrincipal JwtAuthenticationToken authentication) {
        // 获取经过身份验证的用户信息
        String username = authentication.getName();
        // ...
        return "Hello, " + username + "!";
    }
}