import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.HttpMethod; import org.springframework.security.config.annotation.web.builders.HttpSecurity; import org.springframework.security.config.annotation.web.builders.WebSecurity; 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; @Configuration @EnableWebSecurity public class SecurityConfig extends WebSecurityConfigurerAdapter { @Autowired private JwtTokenProvider jwtTokenProvider; @Override protected void configure(HttpSecurity http) throws Exception { http.csrf().disable().authorizeRequests() .antMatchers("/api/**").authenticated() .and() .apply(new JwtConfigurer(jwtTokenProvider)); } @Override public void configure(WebSecurity web) throws Exception { web.ignoring().antMatchers(HttpMethod.OPTIONS, "/**"); } @Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(12); } } 这段代码中JwtConfigurer报错，帮我修改下

你需要在代码中定义 JwtConfigurer 类，或者使用 Spring Security 提供的 JwtConfigurer 类，具体代码如下：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
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;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtTokenProvider jwtTokenProvider;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .addFilterBefore(new JwtTokenFilter(jwtTokenProvider), UsernamePasswordAuthenticationFilter.class)
                .authorizeRequests()
                .antMatchers("/api/**").authenticated()
                .anyRequest().permitAll();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers(HttpMethod.OPTIONS, "/**");
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder(12);
    }

}

其中，JwtTokenFilter 是实现了 JWT 鉴权的过滤器。通过在 `configure` 方法中添加 `.addFilterBefore(new JwtTokenFilter(jwtTokenProvider), UsernamePasswordAuthenticationFilter.class)`，让该过滤器先于 Spring Security 的默认过滤器执行，以实现 JWT 鉴权。