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我有这个CSV:CSV读卡器空值Java
0,102000082,,2,125,'Battery location','Left-hand drive',2,2
0,300000029,102000082,3,895,'Behind the cab','Left',2,-7
0,102000082,,4,127,'Battery location','Right-hand drive',4,4
^-----
我用csvReader
映射到一个bean
public static List<BatteryBean> loadAndRead{
File csvFilename = new File("C:\\my.csv");
CSVReader csvReader = new CSVReader(new FileReader(csvFilename));
ColumnPositionMappingStrategy strat = new ColumnPositionMappingStrategy();
strat.setType(BatteryBean.class);
String[] columns = new String[] { "ktypnr","sentenceId","parentId","sortOrder", "adjItemNoteId","sentText","itemNoteText","parentSortOrder1","parentSortOrder10" };
strat.setColumnMapping(columns);
CsvToBean csv = new CsvToBean();
List<BatteryBean> list = csv.parse(strat, csvReader);
return list;
}
public static void main(String[] args) {
try {
List<BatteryBean> list = loadAndRead("C:\\work\\battery_report_raw.csv");
for (Object object : list) {
BatteryBean bb = (BatteryBean) object;
System.out.println(bb.getKtypnr());
}
}
所以问题是,该文件包含之间空字符串,,我在分析得到exeption:java.lang.NumberFormatException:
所致对于输入字符串: “”
我解决了。我还有一个问题
Csv file
ktypnr sentence_id parent_id sort_order adj_item_note_id sent_text iem_note_text
0 102000082 2 125 Battery location' Left-hand drive'
0 300000029 102000082 3 895 Behind the cab' Left'
0 102000082 4 127 Battery location' Right-hand drive'
0 300000029 102000082 5 898 Behind the cab' Right'
所以,如果一个sentence_id =一个PARENT_ID我要结合这两个,这样看起来是这样的(例如第一线和第二线),但我还应该考虑SORT_ORDER:
0, Battery location, Left-hand drive, Behind the cab, Left
我不知道如何进行
更改你的bean,使它是一个字符串? –
明显的例外。你还在期待什么? –
是的,更改为一个字符串,然后我会做一个解析,如果它不是null。 – alex1111