mybatis dynamic table name

1. Based on mybatis official documentation

@Configuration
public class MybatisPlusConfig {
    
    

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
    
    
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        DynamicTableNameInnerInterceptor dynamicTableNameInnerInterceptor = new DynamicTableNameInnerInterceptor();
        dynamicTableNameInnerInterceptor.setTableNameHandler((sql, tableName) -> {
    
    
            // 获取参数方法
            Map<String, Object> paramMap = RequestDataHelper.getRequestData();
            paramMap.forEach((k, v) -> System.err.println(k + "----" + v));

            String year = "_2018";
            int random = new Random().nextInt(10);
            if (random % 2 == 1) {
    
    
                year = "_2019";
            }
            return tableName + year;
        });
        interceptor.addInnerInterceptor(dynamicTableNameInnerInterceptor);
        // 3.4.3.2 作废该方式
        // dynamicTableNameInnerInterceptor.setTableNameHandlerMap(map);
        return interceptor;
    }
}

/**
 * 请求参数传递辅助类
 */
public class RequestDataHelper {
    
    
    /**
     * 请求参数存取
     */
    private static final ThreadLocal<Map<String, Object>> REQUEST_DATA = new ThreadLocal<>();

    /**
     * 设置请求参数
     *
     * @param requestData 请求参数 MAP 对象
     */
    public static void setRequestData(Map<String, Object> requestData) {
    
    
        REQUEST_DATA.set(requestData);
    }

    /**
     * 获取请求参数
     *
     * @param param 请求参数
     * @return 请求参数 MAP 对象
     */
    public static <T> T getRequestData(String param) {
    
    
        Map<String, Object> dataMap = getRequestData();
        if (CollectionUtils.isNotEmpty(dataMap)) {
    
    
            return (T) dataMap.get(param);
        }
        return null;
    }

    /**
     * 获取请求参数
     *
     * @return 请求参数 MAP 对象
     */
    public static Map<String, Object> getRequestData() {
    
    
        return REQUEST_DATA.get();
    }
}

2. How to use parameters

@Mapper
public interface LogMapper extends BaseMapper<LogEntity> {
    
    
    List<LogEntity> queryAll(@Param("tableName")String tableName);
}

<?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.zhubayi.dynatable.mapper.LogMapper">
    <!--namespace:名称空间
    id:唯一标识
    resultType:返回值类型
    ${tableName}:从传递过来的参数中取出tableName值
    -->
    <select id="queryAll" resultType="com.zhubayi.dynatable.entity.LogEntity">
        select * from ${tableName};
    </select>
</mapper>