SpringBoot集成SpringSecurity从0到1搭建权限管理详细过程（认证+授权）

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
 
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Bean
    public UserDetailsService myUserDetailsService() {
        InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager();
        manager.createUser(User.withUsername("user").password("user").roles("USER").build());
        manager.createUser(User.withUsername("admin").password("admin").roles("USER", "ADMIN").build());
        return manager;
    }
 
    @Bean
    public PasswordEncoder passwordEncoder() {
        return NoOpPasswordEncoder.getInstance(); // 仅用于开发环境
    }
 
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(myUserDetailsService()).passwordEncoder(passwordEncoder());
    }
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .antMatchers("/", "/home").permitAll()
                .antMatchers("/admin/**").hasRole("ADMIN")
                .antMatchers("/db/**").hasRole("DBA")
                .anyRequest().authenticated()
                .and()
            .formLogin()
                .loginPage("/login")
                .permitAll()
                .and()
            .logout()
                .permitAll();
    }
}

这段代码定义了一个名为SecurityConfig的配置类，继承自WebSecurityConfigurerAdapter。它创建了一个用户详情服务myUserDetailsService，并定义了两个用户：一个普通用户和一个管理员用户。同时，它提供了一个PasswordEncoder的Bean，用于密码编码，这里为了简化使用了不增强安全性的\`NoOpP