private static final Logger logger = LoggerFactory.getLogger(ExcelUtils.class);
//成功
public static final Integer STATUS_OK = Integer.valueOf(1);
//失败
public static final Integer STATUS_NO = Integer.valueOf(0);
/** * 私有化构造器 */
private ExcelUtils(){
}
/** * 获取excel文件中的数据对象 *
* @param is excel
* @param excelColumnNames excel中每个字段的英文名(应该与pojo对象的字段名一致,顺序与excel一致)
* @return excel每行是list一条记录，map是对应的"字段名-->值"
* @throws Exception
*/
public static List<Map<String, Object>> getImportData(InputStream is, List<String> excelColumnNames) throws Exception {
logger.debug("InputStream:{}", is);
if (is == null) { return Collections.emptyList(); }
Workbook workbook = null;
try {
//拿到excel
workbook = Workbook.getWorkbook(is);
} catch (BiffException e) {
logger.error(e.getMessage(), e);
return Collections.EMPTY_LIST;
} catch (IOException e) {
logger.error(e.getMessage(), e);
return Collections.EMPTY_LIST;
}
logger.debug("workbook:{}", workbook);
if (workbook == null) { return Collections.emptyList(); }
//第一个sheet
Sheet sheet = workbook.getSheet(0);
//行数
int rowCounts = sheet.getRows() - 1;
logger.debug("rowCounts:{}", rowCounts);
List<Map<String, Object>> list = new ArrayList<>(rowCounts - 1);
//双重for循环取出数据
for(int i = 1; i < rowCounts; i++){
Map<String, Object> params = new HashedMap();
//i,j i:行 j:列
for(int j = 0; j < excelColumnNames.size(); j++){
Cell cell = sheet.getCell(j, i);
params.put(excelColumnNames.get(j), cell.getContents());
}
list.add(params);
} return list;
}
/**
* 获取导入数据为对象的List
*
* @param data
* @param clazz
* @param excelColumnNames
* @param checkExcel
* @param <T>
* @return
* @throws Exception
*/
public static <T> List<T> makeData(List<Map<String, String>> data, Class<T> clazz, List<String> excelColumnNames, CheckExcel checkExcel) throws Exception {
if(data == null || data.isEmpty() || clazz == null || checkExcel == null) {
return Collections.EMPTY_LIST;
}
List<T> result = new ArrayList<T>(data.size());
for(Map<String, String> d : data) {
if(checkExcel != null && !checkExcel.check(d)) { continue; }
T entity = clazz.newInstance();
for(String column : excelColumnNames) {
BeanUtils.setProperty(entity, column, d.get(column));
}
result.add(entity);
}
return result;
}
使用：
List<String> ls = new ArrayList<String>();
ls.add("pnumber");
ls.add("hwd");
ls.add("loss");
ls.add("centerM");
ls.add("pierNo");
ls.add("startM");
ls.add("endM");
ls.add("capHeight");
ls.add("cat");
InputStream is = new FileInputStream("/home/nemo/VirtualBox VMs/common/CT.xls");
List<Map<String,Object>> res = getImportData(is,ls);
