mybatis plus 的動態表名的配置詳解
阿新 • • 發佈:2020-09-03
mybatis plus簡介
詳見mybatis plus的官網
業務要求
- 業務上要求儲存資料的時候根據某個欄位動態的選擇資料要儲存的表.
- 如根據code欄位: code->[1001,1002]來進行選擇儲存的表:
- 經過下面的配置實現動態表名如 --> table1_1001,table_1002的效果.以此動態生成表名的效果.
具體實現
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; /** * @Author: xuzz * @Description: * @Date: Created in 上午11:22 19-10-12 * @Modified By: */ @Configuration @MapperScan("com.dao") public class MPConfig { @Autowired private Tables tableNames; /** * @Author: xuzz * @Date: 上午11:46 19-10-12 * 動態表名 */ @Bean public PaginationInterceptor paginationInterceptor(){ PaginationInterceptor paginationInterceptor = new PaginationInterceptor(); DynamicTableNameParser dynamicTableNameParser = new DynamicTableNameParser(); dynamicTableNameParser.setTableNameHandlerMap(new HashMap<String,ITableNameHandler>(2){{ //涉及表集合 List<String> tables = tableNames.getTableNames(); //動態表規則 初始表名+_+code tables.forEach(tableTitle -> put(tableTitle,(metaObject,sql,tableName) -> tableName + "_" + String.valueOf(getParamValue("關鍵欄位名",metaObject)))); }}); paginationInterceptor.setSqlParserList(Collections.singletonList(dynamicTableNameParser)); return paginationInterceptor; } /** * @Author: xuzz * @Date: 下午2:55 19-10-12 * 獲取引數值 */ private Object getParamValue(String title,MetaObject metaObject){ //獲取引數 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 表頭列表類
@Configuration @ConfigurationProperties("mp") public class Tables { private List<String> tableNames; public List<String> getTableNames() { return tableNames; } public void setTableNames(List<String> tableNames) { this.tableNames = tableNames; } }
application.yml
mp: tableNames: #表頭列表 - table1 - table2 - table3
其他基礎配置的無異
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