MybatisPlus实现insertBatchSomeColumn进行批量增加

野性酷女 2023-10-09 15:53 44阅读 0赞

#### 1、引入相关依赖 ####

<dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>3.5.1</version>
            </dependency>
                    
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-extension</artifactId>
                <version>3.5.1</version>
            </dependency>

#### 2、编写sql注入器 ####

package com.linmain.mysql.config;
    
    import com.baomidou.mybatisplus.annotation.FieldFill;
    import com.baomidou.mybatisplus.core.injector.AbstractMethod;
    import com.baomidou.mybatisplus.core.injector.DefaultSqlInjector;
    import com.baomidou.mybatisplus.core.metadata.TableInfo;
    import com.baomidou.mybatisplus.extension.injector.methods.InsertBatchSomeColumn;
    
    import java.util.List;
    
    /**
     * @Author linzhuoqi
     * @Date 2023/3/10
     * @Eamil 1580752420@qq.com
     * @Version
     * @Description    自定义的sql注入器，插入了批量插入的方法
     */
    public class EasySqlInjector extends DefaultSqlInjector {
        
        @Override
        public List<AbstractMethod> getMethodList(Class<?> mapperClass, TableInfo tableInfo) {
        
    
            // 注意：此SQL注入器继承了DefaultSqlInjector(默认注入器)，调用了DefaultSqlInjector的getMethodList方法，保留了mybatis-plus的自带方法
            List<AbstractMethod> methodList = super.getMethodList(mapperClass, tableInfo);
            //增加了一个批量插入的方法
            methodList.add(new InsertBatchSomeColumn(i -> i.getFieldFill() != FieldFill.UPDATE));
            return methodList;
        }
    }

#### 3、在mybatisPlus的配置类中注入插件 ####

@Configuration
    public class MyBatisPlusConfig {
        
     
        @Bean
        public MybatisPlusInterceptor mybatisPlusInterceptor(){
        
            MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
            //添加分页插件
            interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
            //添加乐观锁插件
            interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
            return interceptor;
        }
     
        @Bean
        public EasySqlInjector easySqlInjector() {
        
            return new EasySqlInjector();
        }
     
    }

#### 4、编写dao层接口 ####

package com.linmain.column.dao;
    
    import com.baomidou.mybatisplus.core.mapper.BaseMapper;
    import com.linmain.column.pojo.entity.ColTag;
    import org.apache.ibatis.annotations.Mapper;
    import org.apache.ibatis.annotations.Param;
    
    import java.io.Serializable;
    import java.util.Collection;
    import java.util.List;
    
    /**
     * 专栏标签(ColTag)表数据库访问层
     *
     * @Author linzhuoqi
     * @Date 2023-03-02 20:44:38
     * @Eamil 1580752420@qq.com
     * @Version
     * @Description
     */
    @Mapper
    public interface ColTagDao extends BaseMapper<ColTag> {
        
        /**
         * 批量插入 仅适用于mysql
         *
         * @param entityList 实体列表
         * @return 影响行数
         */
        Integer insertBatchSomeColumn(Collection<ColTag> entityList);
    }

#### 5、最后 ####

进行正常的使用即可

colTagDao.insertBatchSomeColumn(colTags);