mybatis-plus根据任意字段saveOrUpdateBatch更新插入的方法实现

@Transactional(
        rollbackFor = {Exception.class}
    )
    public boolean saveOrUpdateBatch(Collection<T> entityList, int batchSize) {
        TableInfo tableInfo = TableInfoHelper.getTableInfo(this.entityClass);
        Assert.notNull(tableInfo, "error: can not execute. because can not find cache of TableInfo for entity!", new Object[0]);
        String keyProperty = tableInfo.getKeyProperty();
        Assert.notEmpty(keyProperty, "error: can not execute. because can not find column for id from entity!", new Object[0]);
        return SqlHelper.saveOrUpdateBatch(this.entityClass, this.mapperClass, this.log, entityList, batchSize, (sqlSession, entity) -> {
            Object idVal = ReflectionKit.getFieldValue(entity, keyProperty);
            return StringUtils.checkValNull(idVal) || CollectionUtils.isEmpty(sqlSession.selectList(this.getSqlStatement(SqlMethod.SELECT_BY_ID), entity));
        }, (sqlSession, entity) -> {
            MapperMethod.ParamMap<T> param = new MapperMethod.ParamMap();
            param.put("et", entity);
            sqlSession.update(this.getSqlStatement(SqlMethod.UPDATE_BY_ID), param);
        });
    }

public static <E> boolean saveOrUpdateBatch(Class<?> entityClass, Class<?> mapper, Log log, Collection<E> list, int batchSize, BiPredicate<SqlSession, E> predicate, BiConsumer<SqlSession, E> consumer) {
        String sqlStatement = getSqlStatement(mapper, SqlMethod.INSERT_ONE);
        return executeBatch(entityClass, log, list, batchSize, (sqlSession, entity) -> {
            if (predicate.test(sqlSession, entity)) {
                sqlSession.insert(sqlStatement, entity);
            } else {
                consumer.accept(sqlSession, entity);
            }
        });
    }

boolean saveOrUpdateBatchByAgentIdAndPeriodAndType(List<Entity> list);

@Transactional(rollbackFor = Exception.class)
    @DS("XXXX")//如果为多数据源，这里要指明具体操作的数据源名称
    public boolean saveOrUpdateBatchByAgentIdAndPeriodAndType(List<Entity> list) {
        return SqlHelper.saveOrUpdateBatch(entityClass, this.mapperClass, super.log, list, DEFAULT_BATCH_SIZE, (sqlSession, entity) -> {//这里主要是查询唯一约束对应的记录是否存在
            LambdaQueryWrapper<Entity> queryWrapper = Wrappers.<Entity>lambdaQuery()
                    .eq(Entity::getAgentId, entity.getAgentId()).eq(Entity::getPeriod,entity.getPeriod())
                    .eq(Entity::getType,entity.getType());
            Map<String, Object> map = CollectionUtils.newHashMapWithExpectedSize(1);
            map.put(Constants.WRAPPER, queryWrapper);
            return CollectionUtils.isEmpty(sqlSession.selectList(getSqlStatement(SqlMethod.SELECT_LIST), map));
        }, (sqlSession, entity) -> {
            LambdaUpdateWrapper<Entity> lambdaUpdateWrapper = new LambdaUpdateWrapper<>();
            lambdaUpdateWrapper.eq(Entity::getAgentId, entity.getAgentId()).eq(Entity::getPeriod,entity.getPeriod())
                    .eq(Entity::getType,entity.getType());
            Map<String, Object> param = CollectionUtils.newHashMapWithExpectedSize(2);
            param.put(Constants.ENTITY, entity);
            param.put(Constants.WRAPPER, lambdaUpdateWrapper);
            sqlSession.update(getSqlStatement(SqlMethod.UPDATE), param);
        });
    }