mybatis-plus动态表名的实现示例

<dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatis-plus-boot-starter</artifactId>
 <version>3.3.1.tmp</version>
</dependency>

package com.huanchuang.common.config;
 
import com.baomidou.mybatisplus.extension.parsers.DynamicTableNameParser;
import com.baomidou.mybatisplus.extension.parsers.ITableNameHandler;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
 
import java.util.Collections;
import java.util.HashMap;
 
/**
 * @Package: com.huanchuang.common.config
 * @Description: <mybatis-plush配置类>
 * @Author: MILLA
 * @CreateDate: 2020/09/04 14:42
 * @UpdateUser: MILLA
 * @UpdateDate: 2020/09/04 14:42
 * @UpdateRemark: <>
 * @Version: 1.0
 */
@Configuration
@MapperScan("com.huanchuang.ext.mapper**")
@ConditionalOnProperty(prefix = "spring.config", name = "enableMybatisPlusDynamicTable", havingValue = "true")
public class MybatisPlusDynamicTableConfig {
 
 private static final String DYNAMIC_TABLE_PRE = "common_user";
 
 /**
  * mybatis-plus分页插件
  */
 @Bean
 public PaginationInterceptor paginationInterceptor() {
  PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
  // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求 默认false
  paginationInterceptor.setOverflow(false);
  // 设置最大单页限制数量，默认 500 条，-1 不受限制
  paginationInterceptor.setLimit(500);
//  // 开启 count 的 join 优化,只针对部分 left join
  paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
  DynamicTableNameParser dynamicTableNameParser = new DynamicTableNameParser();
  dynamicTableNameParser.setTableNameHandlerMap(new HashMap<String, ITableNameHandler>(2) {{
   //动态表规则-生成自己需要的动态表名
   put(DYNAMIC_TABLE_PRE, (metaObject, sql, tableName) -> DynamicTableTreadLocal.INSTANCE.getTableName());
  }});
  paginationInterceptor.setSqlParserList(Collections.singletonList(dynamicTableNameParser));
  return paginationInterceptor;
 }
}

package com.huanchuang.common.config;
 
/**
 * @Package: com.huanchuang.common.config
 * @Description: <动态表格存储类>
 * @Author: MILLA
 * @CreateDate: 2020/09/04 14:42
 * @UpdateUser: MILLA
 * @UpdateDate: 2020/09/04 14:42
 * @UpdateRemark: <>
 * @Version: 1.0
 */
public enum DynamicTableTreadLocal {
 INSTANCE;
 private ThreadLocal<String> tableName = new ThreadLocal<>();
 
 public String getTableName() {
  return tableName.get();
 }
 
 public void setTableName(String tableName) {
  this.tableName.set(tableName);
 }
 
 public void remove() {
  tableName.remove();
 }
 
}

 private void select(int year) {
 
   DynamicTableTreadLocal.INSTANCE.setTableName("user_" + year);
   LambdaQueryWrapper<SparkDownSample> wrapper = Wrappers.lambdaQuery(User.class);
   List<User> userList = userMapper.list(wrapper )
 
 }

@Data
public class User {
 
 private Long id;
 
 private String userName;
 
 private String address;
 
 private char sex;
 
 private Byte age;
 
}