写一段使用SpringBoot ＋ Mybatis实现user表分表插入用户数据代码，要求分成10张表

首先需要在数据库中创建10张user表，每张表的表名为user_0至user_9，表结构和索引一致。然后在SpringBoot项目中，需要配置数据源和Mybatis插件。

以下是示例代码：

1. 配置数据源

@Configuration
public class DataSourceConfig {

    @Bean
    public DataSource dataSource() {
        // 配置数据源，这里使用Druid
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setUrl("jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8");
        dataSource.setUsername("root");
        dataSource.setPassword("123456");
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");

        return dataSource;
    }
}

2. 配置Mybatis插件

@Configuration
@MapperScan(basePackages = "com.example.demo.mapper")
public class MybatisConfig {

    @Autowired
    private DataSource dataSource;

    @Bean
    public SqlSessionFactoryBean sqlSessionFactoryBean() throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);

        // 配置分表插件
        ShardingPlugin shardingPlugin = new ShardingPlugin();
        Properties properties = new Properties();
        properties.setProperty("dbCount", "10");
        properties.setProperty("tableCount", "10");
        properties.setProperty("dbIndex", "0");
        shardingPlugin.setProperties(properties);
        sqlSessionFactoryBean.setPlugins(new Interceptor[]{shardingPlugin});

        // 配置实体类别名
        sqlSessionFactoryBean.setTypeAliasesPackage("com.example.demo.entity");

        return sqlSessionFactoryBean;
    }
}

3. 编写Mapper接口和XML文件

@Mapper
public interface UserMapper {

    @Insert("INSERT INTO user_${userId % 10} (name, age, sex) VALUES (#{name}, #{age}, #{sex})")
    void insertUser(@Param("userId") Long userId, @Param("name") String name, @Param("age") Integer age, @Param("sex") String sex);

}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo.mapper.UserMapper">

    <insert id="insertUser">
        INSERT INTO user_${userId % 10} (name, age, sex) VALUES (#{name}, #{age}, #{sex})
    </insert>

</mapper>

4. 测试插入数据

@RestController
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @PostMapping("/users")
    public void insertUser(@RequestBody User user) {
        userMapper.insertUser(user.getId(), user.getName(), user.getAge(), user.getSex());
    }

}