spring security自定义登录方式post不支持

public class CustomLoginFilter extends AbstractAuthenticationProcessingFilter {

    public CustomLoginFilter(String defaultFilterProcessesUrl) {
        super(defaultFilterProcessesUrl);
    }

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException, ServletException {
        // 在这里处理自定义的登录逻辑，例如从请求中获取用户名和密码
        String username = obtainUsername(request);
        String password = obtainPassword(request);

        // 创建一个UsernamePasswordAuthenticationToken对象，用于封装用户名和密码
        UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);

        // 调用AuthenticationManager进行认证
        return this.getAuthenticationManager().authenticate(authRequest);
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .addFilterBefore(new CustomLoginFilter("/custom-login"), UsernamePasswordAuthenticationFilter.class)
            .authorizeRequests()
                .antMatchers("/custom-login").permitAll()
                .anyRequest().authenticated()
                .and()
            .formLogin()
                .loginPage("/login")
                .permitAll()
                .and()
            .logout()
                .permitAll();
    }
}