mybatis plus 的动态表名的配置详解

mybatis plus简介

详见mybatis plus的官网

业务要求

• 业务上要求存储数据的时候根据某个字段动态的选择数据要存储的表.
• 如根据code字段: code->[1001,1002]来进行选择存储的表:
• 经过下面的配置实现动态表名如 --> table1_1001,table_1002的效果.以此动态生成表名的效果.

具体实现

MPConfig.java

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.extension.parsers.DynamicTableNameParser;
import com.baomidou.mybatisplus.extension.parsers.ITableNameHandler;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.apache.ibatis.reflection.metaObject;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;


@Configuration
@MapperScan("com.dao")
public class MPConfig {

  @Autowired
  private Tables tableNames;

  
  @Bean
  public PaginationInterceptor paginationInterceptor(){
    PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
    DynamicTableNameParser dynamicTableNameParser = new DynamicTableNameParser();
    dynamicTableNameParser.setTableNameHandlerMap(new HashMap(2){{
      //涉及表集合
      List tables = tableNames.getTableNames();
      //动态表规则 初始表名+_+code
      tables.forEach(tableTitle -> put(tableTitle,(metaObject, sql, tableName) -> tableName + "_" + String.valueOf(getParamValue("关键字段名",metaObject))));
    }});
    paginationInterceptor.setSqlParserList(Collections.singletonList(dynamicTableNameParser));
    return paginationInterceptor;
  }

  
  private Object getParamValue(String title, metaObject metaObject){
    //获取参数
    Object originalObject = metaObject.getOriginalObject();
    JSonObject originalObjectJSON = JSON.parseObject(JSON.toJSonString(originalObject));
    JSonObject boundSql = originalObjectJSON.getJSonObject("boundSql");
    JSonObject parameterObject = boundSql.getJSonObject("parameterObject");
     return parameterObject.get(title);
  }

Tables.java 表头列表类

@Configuration
@ConfigurationProperties("mp")
public class Tables {

  private List tableNames;

  public List getTableNames() {
    return tableNames;
  }

  public void setTableNames(List tableNames) {
    this.tableNames = tableNames;
  }
}

application.yml

mp:
  tableNames: #表头列表
   - table1
   - table2
   - table3

其他基础配置的无异

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