1,POM配置

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.13</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>demo</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <!-- 由于Mybatis Plus使用了druid作为默认的数据源，分库分表使用的是HikariDataSource作为数据源管理，所以需要排除druid的starter -->
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba</groupId>
                    <artifactId>druid-spring-boot-starter</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.33</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- 分库分表，先去掉druid数据源 -->
     <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.2.18</version>
     </dependency>

<!--        &lt;!&ndash;HikariCP 高性能的JDBC连接池&ndash;&gt;-->
<!--        <dependency>-->
<!--            <groupId>com.zaxxer</groupId>-->
<!--            <artifactId>HikariCP</artifactId>-->
<!--            <version>5.0.0</version>-->
<!--        </dependency>-->

        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>
            <version>4.0.0-RC2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shardingsphere</groupId>
            <artifactId>sharding-jdbc-spring-namespace</artifactId>
            <version>4.0.0-RC2</version>
        </dependency>
<!--        <dependency>-->
<!--            <groupId>org.apache.shardingsphere</groupId>-->
<!--            <artifactId>sharding-jdbc-spring-boot-starter</artifactId>-->
<!--            <version>4.1.1</version>-->
<!--        </dependency>-->
              <!-- Mybatis与JacksonJson时间转换异常处理 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-typehandlers-jsr310</artifactId>
            <version>1.0.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch
        -->

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-extension</artifactId>
            <version>3.5.3.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.5.3.1</version>
        </dependency>
        <!-- mybatis-plus 依赖 -->
        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.3.1</version>
        </dependency>

        <!-- mybatis-plus 代码生成器依赖 -->
        <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-generator -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2，YML配置

application.yml

server:
  port: 8081
mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
  mapper-locations: classpath:mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
spring:
  profiles:
    active: sharding

application-sharding.yml

# 数据源配置 spring.shardingsphere.datasource.
spring:
  shardingsphere:
    enabled: true
    props:
      sql:
        show: true
    datasource:
      names: ftdb0,ftdb1
      # 主数据库配置
      ftdb0:
        # 数据源类名，这里使用的是阿里巴巴的Druid连接池
        type: com.alibaba.druid.pool.DruidDataSource
        # JDBC驱动类名
        driver-class-name: com.mysql.cj.jdbc.Driver
        # 数据库连接URL，包括数据库地址、端口、数据库名以及连接参数
        url: jdbc:mysql://10.1.179.245:3306/ftdb0?useUnicode=true&characterEncoding=UTF-8&useSSL=false&allowPublicKeyRetrieval=true&allowMultiQueries=true&autoReconnect=true&serverTimezone=GMT%2B8
        # 数据库登录用户名
        username: root
        # 数据库登录密码
        password: Loit@0487
      ftdb1:
        # 数据源类名，这里使用的是阿里巴巴的Druid连接池
        type: com.alibaba.druid.pool.DruidDataSource
        # JDBC驱动类名
        driver-class-name: com.mysql.cj.jdbc.Driver
        # 数据库连接URL，包括数据库地址、端口、数据库名以及连接参数
        url: jdbc:mysql://10.1.179.245:3306/ftdb1?useUnicode=true&characterEncoding=UTF-8&useSSL=false&allowPublicKeyRetrieval=true&allowMultiQueries=true&autoReconnect=true&serverTimezone=GMT%2B8
        # 数据库登录用户名
        username: root
        # 数据库登录密码
        password: Loit@0487
    sharding:
      # 定义需要分片的表及其分片策略
      tables:
        tbl_book:
          # 定义实际的数据节点，包括数据源名称和表名
          # 个人只是想分表就这样配置的，分库的话可以配置为：ftdb$->{0..1}.tbl_book_$->{0..2}
          actual-data-nodes: ftdb0.tbl_book_$->{0..2}
          # 定义表的分片策略
          table-strategy:
            inline:
              # 分片键和分片算法名称
              sharding-column: id
              algorithm-expression: tbl_book_$->{id % 3}
          # 定义键生成策略
          key-generator:
            column: id  # 指定键生成策略的列名
            type: SNOWFLAKE  # 指定使用的键生成器名称 这里使用的雪花算法

3，启动类

package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {

        SpringApplication.run(DemoApplication.class, args);
    }

}

4, 测试

DemoApplicationTests

@SpringBootTest
class DemoApplicationTests {

    @Autowired
    private BookDao bookDao;

    @Test
    void testGetAll() {
        System.out.println(bookDao.selectList(null));
    }

    @Test
    void save() {
        Book book = new Book();
        book.setName("语文");
        book.setType("1");
        book.setDescription("语文课本");
        bookDao.insert(book);
    }

}

5，源码

000000/shardingsphere

常见报错

Data sources cannot be empty.

原因多半就是yml配置文件配置有问题，别瞎搞什么启动类屏蔽自动转载类（@SpringBootApplication(exclude={DataSourceAutoConfiguration.class, SpringBootConfiguration.class})）