wordpress电脑/seo顾问服务福建

1.基于mybatis官方文档

@Configuration
public class MybatisPlusConfig {@Beanpublic 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. 使用参数的方式

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

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapperPUBLIC "-//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>