feat(security): 添加自定义认证和授权异常处理器

- 新增 JwtAccessDeniedHandler 处理权限不足异常
- 新增 JwtAuthenticationEntryPoint 处理认证失败异常- 在 SecurityConfig 中集成自定义异常处理器
- 优化 GlobalExceptionHandler 中的异常日志输出

biji-houdaun/src/main/java/com/test/bijihoudaun/config/SecurityConfig.java

@@ -1,9 +1,7 @@
 package com.test.bijihoudaun.config;
 
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import com.test.bijihoudaun.config.security.JwtAccessDeniedHandler;
+import com.test.bijihoudaun.config.security.JwtAuthenticationEntryPoint;
 import com.test.bijihoudaun.interceptor.JwtAuthenticationTokenFilter;
 import com.test.bijihoudaun.util.JwtTokenUtil;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -29,6 +27,12 @@ public class SecurityConfig {
     @Autowired
     private JwtTokenUtil jwtTokenUtil;
 
+    @Autowired
+    private JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;
+
+    @Autowired
+    private JwtAccessDeniedHandler jwtAccessDeniedHandler;
+
     @Value("${jwt.header}")
     private String tokenHeader;
 
@@ -51,6 +55,11 @@ public class SecurityConfig {
                         .requestMatchers("/doc.html", "/webjars/**", "/v3/api-docs/**", "/api/user/login", "/api/user/register").permitAll()
                         .requestMatchers(org.springframework.http.HttpMethod.GET).permitAll()
                         .anyRequest().authenticated()
+                )
+                // 添加自定义的异常处理器
+                .exceptionHandling(exceptions -> exceptions
+                        .authenticationEntryPoint(jwtAuthenticationEntryPoint)
+                        .accessDeniedHandler(jwtAccessDeniedHandler)
                 );
 
         // 在这里添加JWT过滤器

biji-houdaun/src/main/java/com/test/bijihoudaun/config/security/JwtAccessDeniedHandler.java

@@ -0,0 +1,35 @@
+package com.test.bijihoudaun.config.security;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.test.bijihoudaun.common.response.R;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.web.access.AccessDeniedHandler;
+import org.springframework.stereotype.Component;
+
+
+import java.io.IOException;
+
+/**
+ * 自定义授权失败处理器
+ * 当认证成功的用户尝试访问其没有权限的资源时，此处理器被调用。
+ */
+@Component
+public class JwtAccessDeniedHandler implements AccessDeniedHandler {
+
+    @Override
+    public void handle(HttpServletRequest request,
+                       HttpServletResponse response,
+                       AccessDeniedException accessDeniedException) throws IOException, ServletException {
+        response.setCharacterEncoding("UTF-8");
+        response.setContentType("application/json");
+        response.setStatus(HttpServletResponse.SC_FORBIDDEN); // 403
+
+        R<String> result = R.fail("权限不足，无法访问此资源");
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        response.getWriter().write(objectMapper.writeValueAsString(result));
+    }
+}

biji-houdaun/src/main/java/com/test/bijihoudaun/config/security/JwtAuthenticationEntryPoint.java

@@ -0,0 +1,37 @@
+package com.test.bijihoudaun.config.security;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.test.bijihoudaun.common.response.R;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.web.AuthenticationEntryPoint;
+import org.springframework.stereotype.Component;
+
+
+import java.io.IOException;
+
+/**
+ * 自定义认证失败处理器
+ * 当用户尝试访问受保护的资源而未提供有效凭证时（例如token无效或过期），此处理器被调用。
+ */
+@Component
+public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint {
+
+    @Override
+    public void commence(HttpServletRequest request,
+                         HttpServletResponse response,
+                         AuthenticationException authException) throws IOException, ServletException {
+        response.setCharacterEncoding("UTF-8");
+        response.setContentType("application/json");
+        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED); // 401
+        
+        // 创建一个包含中文错误信息的R对象
+        R<String> result = R.fail("认证失败，请重新登录");
+
+        // 使用ObjectMapper将对象转换为JSON字符串并写入响应
+        ObjectMapper objectMapper = new ObjectMapper();
+        response.getWriter().write(objectMapper.writeValueAsString(result));
+    }
+}