SpringBoot文档：http://felord.cn/_doc/_springboot/2.1.5.RELEASE/_book/

https://docs.spring.io/spring-boot/docs/current/reference/html/

系统安全框架，用于认证、授权 

1、SpringSecurity依赖



<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>2.5.3</version>
</dependency>


2、命名空间xmlns:th=http://www.thymeleaf.org   xmlns:sec=http://www.thymeleaf.org/extras/spring-security   xmlns:shiro=http://www.pollix.at/thymeleaf/shiro

3、自己创建SecurityConfig



package com.jay.SpringBootStudy8.config;
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.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import static org.springframework.security.config.Customizer.withDefaults;
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    //认证
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
//        super.configure(auth);
        //BCryptPasswordEncoder 加密方式，用户名admin、密码123456
        auth.inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder())
                .withUser("admin").password(new BCryptPasswordEncoder().encode("123456")).roles("vip1","vip2")
                ;
    }
    //授权
    @Override
    protected void configure(HttpSecurity http) throws Exception {
//        http.authorizeRequests(authorize -> authorize.anyRequest().authenticated()).oauth2Login(withDefaults());
        //首页/所有人可访问
        //功能页只有具有权限的人才能访问
        http.authorizeRequests()
                .antMatchers("/").permitAll()
                .antMatchers("/level1/**").hasRole("vip1")
                .antMatchers("/level2/**").hasRole("vip2")
                .antMatchers("/level3/**").hasRole("vip3")
        ;
        //自动调出SpringSecurity的登录
        http.formLogin();
    }
}