继解决Spring data jpa 批量插入重写saveAll()后遇到符号不兼容问题

问题描述

问题：
之前为解决Spring data jpa 批量插入/删除(saveAll()/deleteAll())速度慢的问题
重写了saveAll()方法，用自定义拼接sql的方法组装sql，但是会出现不兼容特殊符号的问题，于是采用预处理的对占位符进行赋值。

---

解决方案：

使用 query.setParameter()对占位符进行赋值处理。

@Override
    public List<OutChannelPlaybill> batchInsertPre(List<OutChannelPlaybill> outChannelPlaybills) {
    
    
        Long beginTime = System.currentTimeMillis(); // 开始时间
        StringBuilder sb = into();
        int i = 0;
        int size;
        if (outChannelPlaybills.size() < 1000) {
    
    
            size = outChannelPlaybills.size() * 13;
        } else {
    
    
            size = 1000 * 13;
        }
        List<Object> paramList = new ArrayList<>(size);
        for (OutChannelPlaybill dis : outChannelPlaybills) {
    
    
            i++;
            if (i > 1) {
    
    
                sb.append(",");
            }
            sb.append(" (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) ");
            paramList.add(dis.getOutChannelId());
            paramList.add(dis.getDuration());
            paramList.add(dis.getName());
            paramList.add(dis.getSynchro());
            paramList.add(dis.getType());
            paramList.add(dis.getStartTime());
            paramList.add(dis.getEndTime());
            paramList.add(dis.getCreatedBy());
            paramList.add(dis.getCreatedTime());
            paramList.add(dis.getUpdatedBy());
            paramList.add(dis.getUpdatedTime());
            paramList.add(dis.getIsLookback());
            paramList.add(dis.getIsShield());
            if (i >= 1000) {
    
    
                Query query = entityManager.createNativeQuery(sb.toString() + ";");
                int paramIndex = 1;
                for (Object obj : paramList) {
    
    
                    query.setParameter(paramIndex++, obj);
                }
                query.executeUpdate();
                i = 0;
                paramList.clear();
                sb = into();
            }
        }
        if (i > 0) {
    
    
            Query query = entityManager.createNativeQuery(sb.toString() + ";");
            int paramIndex = 1;
            for (Object obj : paramList) {
    
    
                query.setParameter(paramIndex++, obj);
            }
            query.executeUpdate();
        }
        Long endTime = System.currentTimeMillis(); // 结束时间
        log.info("-----------批量插入节目单数量：{}, 执行总耗时: {}ms", outChannelPlaybills.size(), (endTime - beginTime));
        return outChannelPlaybills;
    }


//sql前半段方法提取
     private StringBuilder into(){
    
    
		StringBuilder sb = new StringBuilder();
		sb.append("insert into lp_distribute_success_playbill("
				+ "layoutId,"
				+ "outChannelId,"
				+ "contentId,"
				+ "asset_id,"
				+ "type,"
				+ "playUrl,"
				+ "name,"
				+ "displayName,"
				+ "playType,"
				+ "startTime,"
				+ "endTime,"
				+ "duration,"
				+ "insertMode,"
				+ "distributeStatus,"
				+ "createdBy,"
				+ "createdTime,"
				+ "updatedBy,"
				+ "updatedTime) values");
		return sb;
	}