excel读出来的json，它是一个字符串，不是标准json，所以需要对字符串字段进行解析
- 复杂的excel如图
- 通过poi解析json，通过jackson完成对字段的解析
public static List<Map<String, Object>> read(String filePath) throws IOException {
File file = new File(filePath); //creating a new file instance
FileInputStream fis = new FileInputStream(file); //obtaining bytes from the file
XSSFWorkbook wb = new XSSFWorkbook(fis);
XSSFSheet sheet = wb.getSheetAt(0); //creating a Sheet object to retrieve object
Iterator<Row> itr = sheet.iterator(); //iterating over excel file
Row head = sheet.getRow(0);
ObjectMapper mapper = new ObjectMapper();
List<Map<String, Object>> mapList = new ArrayList<>();
itr.next();//跳过第一行
while (itr.hasNext()) {
Row row = itr.next();
Iterator<Cell> cellIterator = row.cellIterator(); //iterating over each column
Map<String, Object> map = new HashMap<>();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
String columnName = head.getCell(cell.getColumnIndex()).toString();
switch (cell.getCellType()) {
case STRING: //field that represents string cell type
try {
JsonNode node = mapper.readTree(cell.getStringCellValue());
if (node.isArray()) {
ArrayNode arrayNode = (ArrayNode) node;
try {
List<Map> innerList = new ArrayList<>();
for (JsonNode jsonNode : arrayNode) {
innerList.add(mapper.convertValue(jsonNode, Map.class));
}
map.put(columnName, innerList);
} catch (Exception ex) {
//简单类型的数组
map.put(columnName, mapper.readValue(cell.getStringCellValue(), new TypeReference<List<String>>() {
}));
}
} else {
map.put(columnName, mapper.convertValue(node, Map.class));
}
} catch (JsonParseException ex) {
map.put(columnName, cell.getStringCellValue());
}
break;
case NUMERIC:
map.put(columnName, cell.getStringCellValue());
break;
default:
}
}
mapList.add(map);
}
return mapList;
}
- 解析后的List
