diff --git a/123.txt b/123.txt
new file mode 100644
index 0000000..e69de29
diff --git a/superMarket-backend/src/main/java/com/shanzhu/market/common/advice/ExceptionControllerAdvice.java b/superMarket-backend/src/main/java/com/shanzhu/market/common/advice/ExceptionControllerAdvice.java
index 6752740..4b31f09 100644
--- a/superMarket-backend/src/main/java/com/shanzhu/market/common/advice/ExceptionControllerAdvice.java
+++ b/superMarket-backend/src/main/java/com/shanzhu/market/common/advice/ExceptionControllerAdvice.java
@@ -1,24 +1,33 @@
+// 包声明：定义当前类所在的包路径
 package com.shanzhu.market.common.advice;
 
-
-import com.shanzhu.market.common.constants.HttpStatus;
-import com.shanzhu.market.common.exception.BusinessException;
-import com.shanzhu.market.common.web.response.JsonResult;
-import org.springframework.web.bind.annotation.ExceptionHandler;
-import org.springframework.web.bind.annotation.RestControllerAdvice;
+// 导入依赖的类库
+import com.shanzhu.market.common.constants.HttpStatus; // HTTP状态码常量
+import com.shanzhu.market.common.exception.BusinessException; // 自定义业务异常
+import com.shanzhu.market.common.web.response.JsonResult; // 统一响应格式工具类
+import org.springframework.web.bind.annotation.ExceptionHandler; // Spring异常处理注解
+import org.springframework.web.bind.annotation.RestControllerAdvice; // Spring控制器增强注解
 
 /**
- * 统一异常处理类的基类
+ * 统一异常处理类的基类（类注释说明核心功能）
  */
-@RestControllerAdvice
+@RestControllerAdvice // 标识该类为全局REST控制器异常处理器
 public class ExceptionControllerAdvice {
+
+    // 处理所有RuntimeException及其子类异常
     @ExceptionHandler(RuntimeException.class)
     public JsonResult<?> commonExceptionHandler(RuntimeException ex){
-        ex.printStackTrace();
-        return JsonResult.error(HttpStatus.CODE_BUSINESS_ERROR,ex.getMessage());
+        ex.printStackTrace(); // 打印异常堆栈跟踪（生产环境建议替换为日志记录）
+        return JsonResult.error( // 返回标准错误响应
+                HttpStatus.CODE_BUSINESS_ERROR, // 使用预定义的业务错误码
+                ex.getMessage()); // 携带异常消息
     }
+
+    // 专门处理自定义业务异常
     @ExceptionHandler(BusinessException.class)
     public JsonResult<?> businessHanler(BusinessException ex){
-        return JsonResult.error(HttpStatus.CODE_BUSINESS_ERROR,ex.getMessage());
+        return JsonResult.error( // 返回标准错误响应
+                HttpStatus.CODE_BUSINESS_ERROR, // 使用相同的业务错误码保持一致性
+                ex.getMessage()); // 携带业务异常消息
     }
 }
diff --git a/superMarket-backend/src/main/java/com/shanzhu/market/common/config/MpConfig - 副本.java b/superMarket-backend/src/main/java/com/shanzhu/market/common/config/MpConfig - 副本.java
new file mode 100644
index 0000000..7666872
--- /dev/null
+++ b/superMarket-backend/src/main/java/com/shanzhu/market/common/config/MpConfig - 副本.java	
@@ -0,0 +1,20 @@
+package com.shanzhu.market.common.config;
+
+import com.baomidou.mybatisplus.annotation.DbType;
+import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MpConfig {
+    /*mybatis plus分页插件生效*/
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor(DbType.MYSQL);
+        paginationInnerInterceptor.setOverflow(true); //合理化
+        interceptor.addInnerInterceptor(paginationInnerInterceptor);
+        return interceptor;
+    }
+}