springboot生成token代码

可以使用Spring Security框架来生成token，以下是一个简单的示例代码：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    private JwtAuthenticationEntryPoint unauthorizedHandler;

    @Bean
    public JwtAuthenticationFilter authenticationTokenFilterBean() throws Exception {
        return new JwtAuthenticationFilter();
    }

    @Override
    public void configure(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
        authenticationManagerBuilder
                .userDetailsService(userDetailsService)
                .passwordEncoder(passwordEncoder());
    }

    @Bean(BeanIds.AUTHENTICATION_MANAGER)
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

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

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.cors().and().csrf().disable()
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                .authorizeRequests()
                .antMatchers("/api/auth/**").permitAll()
                .anyRequest().authenticated();

        // Add our custom JWT security filter
        http.addFilterBefore(authenticationTokenFilterBean(), UsernamePasswordAuthenticationFilter.class);
    }
}

在这个示例中，我们使用了Spring Security框架来配置安全性，使用了JWT（JSON Web Token）来生成token。我们还定义了一个JwtAuthenticationFilter来处理token的验证和解析。在configure()方法中，我们配置了哪些URL需要进行身份验证，哪些URL是公开的。在authenticationManagerBuilder()方法中，我们配置了UserDetailsService和PasswordEncoder，用于验证用户的身份。最后，我们将JwtAuthenticationFilter添加到了Spring Security的过滤器链中。