MyBatis-Plus 动态表名SQL解析器的实现

package com.example.demo.config;

import com.baomidou.mybatisplus.core.parser.ISqlParser;
import com.baomidou.mybatisplus.core.parser.ISqlParserFilter;
import com.baomidou.mybatisplus.core.parser.SqlParserHelper;
import com.baomidou.mybatisplus.extension.parsers.DynamicTableNameParser;
import com.baomidou.mybatisplus.extension.parsers.ITableNameHandler;
import com.baomidou.mybatisplus.extension.plugins.OptimisticLockerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.PerformanceInterceptor;
import com.baomidou.mybatisplus.extension.plugins.tenant.TenantHandler;
import com.baomidou.mybatisplus.extension.plugins.tenant.TenantSqlParser;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.StringValue;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;

import java.util.*;

/**
 * @Auther: IT贱男
 * @Date: 2019/6/12 15:06
 * @Description: MybatisPlus配置类
 */
@Configuration
public class MyBatisPlusConfig {


  /**
   * 分页插件
   *
   * @return
   */
  @Bean
  public PaginationInterceptor paginationInterceptor() {
    PaginationInterceptor paginationInterceptor = new PaginationInterceptor();

    // 创建SQL解析器集合
    List<ISqlParser> sqlParserList = new ArrayList<>();

    // 动态表名SQL解析器
    DynamicTableNameParser dynamicTableNameParser = new DynamicTableNameParser();
    Map<String,ITableNameHandler> tableNameHandlerMap = new HashMap<>();
    // Map的key就是需要替换的原始表名
    tableNameHandlerMap.put("sys_user",new ITableNameHandler(){
      @Override
      public String dynamicTableName(MetaObject metaObject, String sql, String tableName) {
        // 自定义表名规则，或者从配置文件、request上下文中读取

        // 假设这里的用户表根据年份来进行分表操作
        Date date = new Date();
        String year = String.format("%tY", date);
        // 返回最后需要操作的表名，sys_user_2019
        return "sys_user_" + year;
      }
    });
    dynamicTableNameParser.setTableNameHandlerMap(tableNameHandlerMap);
    sqlParserList.add(dynamicTableNameParser);
    paginationInterceptor.setSqlParserList(sqlParserList);


    return paginationInterceptor;
  }

}

  @Test
  public void select(){
    List<User> users = userMapper.selectList(Wrappers.<User>lambdaQuery().eq(User::getAge, 18));
    users.forEach(System.out::println);
  }
INFOStarted UserMapperTest in 3.409 seconds (JVM running for 4.233)
DEBUG==> Preparing: SELECT id, login_name, name, password, email, salt, sex, age, phone, user_type, status, organization_id, create_time, update_time, version, tenant_id FROM sys_user_2019 WHERE sys_user_2019.tenant_id = 'jiannan' AND is_delete = '0' AND age = ? 
DEBUG==> Parameters: 18(Integer)

/**
 * <p>
 * 用户 Mapper 接口
 * </p>
 *
 * @author IT贱男
 * @since 2019-06-14
 */
public interface UserMapper extends BaseMapper<User> {


  /**
   * 自定Wrapper修改
   *
   * @param userWrapper 条件构造器
   * @param user    修改的对象参数
   * @return
   */
  @SqlParser(filter = true)
  int updateByMyWrapper(@Param(Constants.WRAPPER) Wrapper<User> userWrapper, @Param("user") User user);

}