init

demo/src/main/java/com/duanledexianxianxian/demo/SpringWebApplication.java

+package com.duanledexianxianxian.demo;
+
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * The type Spring web application.
+ */
+@SpringBootApplication
+public class SpringWebApplication {
+    /**
+     * The entry point of application.
+     *
+     * @param args the input arguments
+     */
+    public static void main(String[] args) {
+        SpringApplication.run(SpringWebApplication.class, args);
+    }
+
+}

demo/src/main/java/com/duanledexianxianxian/demo/config/MybatisPlusConfig.java

+package com.duanledexianxianxian.demo.config;
+
+import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@EnableTransactionManagement
+@Configuration
+@MapperScan(basePackages = "com.duanledexianxianxian.demo.dao")
+public class MybatisPlusConfig {
+
+    @Bean
+    public PaginationInterceptor paginationInterceptor() {
+        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
+        // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
+        // paginationInterceptor.setOverflow(false);
+        // 设置最大单页限制数量，默认 500 条，-1 不受限制
+        // paginationInterceptor.setLimit(500);
+        // 开启 count 的 join 优化,只针对部分 left join
+        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
+        return paginationInterceptor;
+    }
+}
\ No newline at end of file

demo/src/main/resources/application.yml

+spring:
+  datasource:
+    url: jdbc:mysql://rm-bp1451sz2b7q8w95xvo.mysql.rds.aliyuncs.com:3306/convention?useUnicode=true&characterEncoding=utf8&useSSL=false&zeroDateTimeBehavior=convertToNull
+    password: Convention123
+    username: convention
+    driver-class-name: com.mysql.cj.jdbc.Driver
\ No newline at end of file