项目构建

demo-common/demo-common-jdbc/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>demo-common</artifactId>
+        <groupId>com.yxt.demo</groupId>
+        <version>0.0.1</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>demo-common-jdbc</artifactId>
+    <version>0.0.1</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.yxt.demo</groupId>
+            <artifactId>demo-common-core</artifactId>
+            <version>0.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+    </dependencies>
+</project>

demo-common/demo-common-jdbc/src/main/java/com/yxt/demo/common/jdbc/config/MybatisPlusConfig.java

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+package com.yxt.demo.common.jdbc.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;
+
+/**
+ * @author dimengzhe
+ * @date 2021/9/4 0:40
+ * @description
+ */
+@Configuration
+public class MybatisPlusConfig {
+
+    @Bean
+    public MybatisPlusInterceptor paginationInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
+        return interceptor;
+    }
+}

demo-common/demo-common-jdbc/src/main/java/com/yxt/demo/common/jdbc/service/MybatisBaseService.java

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+package com.yxt.demo.common.jdbc.service;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+
+public class MybatisBaseService<M extends BaseMapper<T>, T> extends ServiceImpl<M, T> {
+
+
+    public T fetchBySid(String sid) {
+        QueryWrapper<T> qw = new QueryWrapper<>();
+        qw.eq("sid", sid);
+        return baseMapper.selectOne(qw);
+    }
+}