如何在SecurityContext中设置AnonymousAuthenticationToken (Spring Boot 1.5.1)

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.security.web.authentication.AnonymousAuthenticationFilter;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .anyRequest().authenticated()
                .and()
            .anonymous()
                .key("uniqueAnonymousKey")
                .principal(getAnonymousAuthentication())
                .and()
            .csrf().disable(); // 禁用CSRF保护（仅供参考，根据具体需求进行配置）
    }
    
    private Authentication getAnonymousAuthentication() {
        AnonymousAuthenticationToken token = new AnonymousAuthenticationToken(
                "uniqueAnonymousKey", "anonymousUser",
                AuthorityUtils.createAuthorityList("ROLE_ANONYMOUS"));
        
        return token;
    }
}

import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;

public class YourClass {
    
    public void yourMethod() {
        User currentUser = (User) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        // 根据需要进行操作
    }
}