Week 1-8: Spring Boot 学习计划完整项目

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

week5/src/main/java/com/learn/config/SecurityConfig.java

@@ -0,0 +1,66 @@
+package com.learn.config;
+
+import com.learn.security.JwtAuthFilter;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.http.SessionCreationPolicy;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
+
+/**
+ * Spring Security 配置（第 1-3 天）
+ *
+ * 核心设计：
+ *   1. 无状态会话（JWT，不依赖 Cookie/Session）
+ *   2. 自定义 JWT 过滤器在 UsernamePasswordAuthenticationFilter 之前执行
+ *   3. RBAC：ADMIN 可增删改，USER 只能查
+ *   4. 公开 /api/auth/** 和 Actuator 端点
+ */
+@Configuration
+@EnableWebSecurity
+@EnableMethodSecurity          // 开启方法级安全注解（第 3 天）
+public class SecurityConfig {
+
+    private final JwtAuthFilter jwtAuthFilter;
+
+    public SecurityConfig(JwtAuthFilter jwtAuthFilter) {
+        this.jwtAuthFilter = jwtAuthFilter;
+    }
+
+    @Bean
+    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+        http
+            .csrf(csrf -> csrf.disable())                    // 前后端分离，禁用 CSRF
+            .sessionManagement(sm -> sm
+                .sessionCreationPolicy(SessionCreationPolicy.STATELESS))  // 无状态
+            .authorizeHttpRequests(auth -> auth
+                // 公开接口
+                .requestMatchers("/api/auth/**").permitAll()
+                .requestMatchers("/actuator/**").permitAll()
+                .requestMatchers("/", "/index.html", "/css/**", "/js/**").permitAll()
+                // 查询：USER 及以上
+                .requestMatchers(HttpMethod.GET, "/api/students/**").hasAnyRole("ADMIN", "USER")
+                // 增删改：仅 ADMIN（第 3 天 RBAC）
+                .requestMatchers(HttpMethod.POST, "/api/students/**").hasRole("ADMIN")
+                .requestMatchers(HttpMethod.PUT, "/api/students/**").hasRole("ADMIN")
+                .requestMatchers(HttpMethod.DELETE, "/api/students/**").hasRole("ADMIN")
+                // 其他请求需认证
+                .anyRequest().authenticated()
+            )
+            // 在用户名密码过滤器之前插入 JWT 过滤器
+            .addFilterBefore(jwtAuthFilter, UsernamePasswordAuthenticationFilter.class);
+
+        return http.build();
+    }
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();   // BCrypt 加密，不可逆
+    }
+}