如何使用Spring从REST服务中获取令牌

<dependencies>
    <!-- Spring Security -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    
    <!-- Spring Web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
            .authorizeRequests()
            .antMatchers("/api/token").permitAll() // 允许访问获取令牌的API
            .anyRequest().authenticated()
            .and()
            .httpBasic();
    }
}

@RestController
@RequestMapping("/api")
public class TokenController {
    
    @GetMapping("/token")
    public String getToken() {
        // 在这里实现获取令牌的逻辑
        return "your_token";
    }
}