优化代码，添加接口

zhijiayun-user/src/main/java/com/xuekairui/user/config/MyBatisPlusConfig.java

@@ -0,0 +1,24 @@
+package com.xuekairui.user.config;
+
+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;
+
+/**
+ * MyBatis-Plus 配置
+ */
+@Configuration
+public class MyBatisPlusConfig {
+
+    /**
+     * 分页拦截器
+     * 必须配置此拦截器，selectPage 才会执行 COUNT 查询，total 才会正确返回
+     */
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
+        return interceptor;
+    }
+}