yml配置

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

新建一个SecurityConfig配置类

import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {

        //首页所有人可以访问，功能页只有对应有权限的人才能访问
        //请求授权规则
        http.authorizeRequests()
                .antMatchers("/").permitAll()
                .antMatchers("/level1/**").hasRole("vip1")
                .antMatchers("/level2/**").hasRole("vip2")
                .antMatchers("/level3/**").hasRole("vip3");
        //没有权限默认会跳到登录页面login.html  详参源码

        http.formLogin();
    }
    //认证, springboot 2.1.X可以直接使用
    // 密码编码:PasswordEncoder
    //在Spring secutiry 5.0+新增了很多的加密方法

    //认证
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        //加上   .passwordEncoder(new BCryptPasswordEncoder())  可以解决高版本提示需要密码编码错误
        auth.inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder())
                //分配用户名密码给指定权限，此处应该从数据库中查出 多个用户用and链接
                .withUser("username").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1", "vip2")
                .and()
                .withUser("root").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1", "vip2", "vip3")
                .and()
                .withUser("test").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1");
    }
   
}

 //如果是数据库配置
    import javax.sql.DataSource;

    @Autowired
    private DataSource dataSource;
    
@Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.jdbcAuthentication()
                .dataSource(dataSource)
                .usersByUsernameQuery("select username,password,enabled from users WHERE username=?")
                .authoritiesByUsernameQuery("select username,authority from authorities where username=?")
                .passwordEncoder(new BCryptPasswordEncoder());
                }