1,将数组的长度定义成集合的长度

List<ElemeterInfo> eleSeqList = elemeterMapper.getEleSeqByterminaluuid(terminaluuid);
String[] eleseqArray = new String[eleSeqList.size()];

  2,循环集合

int i = 0;
            for (ElemeterInfo elemeterInfo : eleSeqList) {
                Integer eleseq = elemeterInfo.getSerialportseq();
                eleseqArray[i++]=String.valueOf(eleseq);
            }

 

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