spring引导安全登录重定向到/当contextPath设置时

在没有设置contextPath的情况下，我可以让它工作。但是，当我在application.properties中设置server.contextPath时，在登录页面时会发生重定向到的情况。可能发生什么事，请帮忙

private static final String[] UNSECURED_RESOURCE_LIST =
        new String[]{"/", "/resources/**", "/static/**", "/css/**", "/webjars/**",
                "/img/**", "/js/**"};

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.authorizeRequests()
            .antMatchers(UNSECURED_RESOURCE_LIST).permitAll()
            .anyRequest().authenticated()
            .and()
            .formLogin()
            .loginPage("/login")
            .defaultSuccessUrl("/index")
            .failureUrl("/login?error")
            .usernameParameter("email")
            .permitAll()
            .and()
            .logout()
            .logoutUrl("/logout")
            .deleteCookies("remember-me")
            .logoutSuccessUrl("/login")
            .permitAll()
            .and()
            .rememberMe();
}

@Override
public void configure(WebSecurity security) {
    //security.ignoring().antMatchers("/css/**","/img/**","/js/**");
    //security.ignoring().antMatchers("/static/**");
    security.ignoring().antMatchers(UNSECURED_RESOURCE_LIST);
    //security.ignoring().antMatchers("/resources/**");
}