public class POIUtil {
private static Logger logger = LoggerFactory.getLogger(POIUtil.class);
private final static String xls = "xls";
private final static String xlsx = "xlsx";
/**
* 读入excel文件,解析后返回集合数组
* @param file
* @throws IOException
*/
public static Map<Integer, List<String[]>> readExcel(File file) throws IOException {
//检查文件
checkFile(file);
//获得Workbook工作薄对象
Workbook workbook = getWorkBook(file);
logger.info("workbook {}", workbook);
//创建返回对象,把每行中的值作为一个数组,所有行作为一个集合返回,并且将每一个sheet作为一个value存入map
Map<Integer, List<String[]>> result = new HashMap<>();
if(workbook != null){
Integer sheetNum=0;
// 解析sheet 只读区两个sheet
Iterator<Sheet> sheetIterator = workbook.sheetIterator();
while (sheetIterator.hasNext()){
//获得当前sheet工作表
Sheet sheet = sheetIterator.next();
List<String[]> list = new ArrayList<>();
if(sheet == null){
continue;
}
//获得当前sheet的开始行
int firstRowNum = sheet.getFirstRowNum();
//获得当前sheet的结束行
int lastRowNum = sheet.getLastRowNum();
//循环除了前1行的所有行
for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
//获得当前行
Row row = sheet.getRow(rowNum);
if(row == null){
continue;
}
//获得当前行的开始列
//int firstCellNum = row.getFirstCellNum();
int firstCellNum = 0; // 强制从第一列开始读
//获得当前行的列数
//int lastCellNum = row.getPhysicalNumberOfCells(); // 此方法会自动剔除空格列(不建议使用)
int lastCellNum = row.getLastCellNum();
//logger.info("当前行的列数 " + lastCellNum);
//logger.info("firstCellNum " + row.getFirstCellNum() + " listCellNum " + row.getLastCellNum());
String[] cells = new String[lastCellNum];
//循环当前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
cells[cellNum] = getCellValue(cell);
cell = null;
}
list.add(cells);
}
result.put(sheetNum++, list);
}
workbook.close();
}
return result;
}
/**
* 读入excel文件,解析后返回集合数组
* @param file
* @throws IOException
*/
public static Map<Integer, List<String[]>> readExcel2(File file) throws IOException {
//检查文件
checkFile(file);
//获得Workbook工作薄对象
Workbook workbook = getWorkBook(file);
//创建返回对象,把每行中的值作为一个数组,所有行作为一个集合返回,并且将每一个sheet作为一个value存入map
Map<Integer, List<String[]>> result = new HashMap<>();
if(workbook != null){
// 解析sheet 只读区两个sheet
for(int sheetNum = 0;sheetNum < 2;sheetNum++){
List<String[]> list = new ArrayList<>();
//获得当前sheet工作表
Sheet sheet = workbook.getSheetAt(sheetNum);
if(sheet == null){
continue;
}
//获得当前sheet的开始行
int firstRowNum = sheet.getFirstRowNum();
//获得当前sheet的结束行
int lastRowNum = sheet.getLastRowNum();
//循环除了前2行的所有行
for(int rowNum = firstRowNum+2;rowNum <= lastRowNum;rowNum++){
//获得当前行
Row row = sheet.getRow(rowNum);
if(row == null){
continue;
}
//int firstCellNum = row.getFirstCellNum();
int firstCellNum = 0; // 强制从第一列开始读
//获得当前行的列数
//int lastCellNum = row.getPhysicalNumberOfCells(); // 此方法会自动剔除空格列(不建议使用)
int lastCellNum = row.getLastCellNum();
//logger.info("当前行的列数 " + lastCellNum);
//logger.info("firstCellNum " + row.getFirstCellNum() + " listCellNum " + row.getLastCellNum());
String[] cells = new String[lastCellNum];
//循环当前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
cells[cellNum] = getCellValue(cell);
}
list.add(cells);
}
result.put(sheetNum, list);
}
workbook.close();
}
return result;
}
private static void checkFile(File file) throws IOException{
//判断文件是否存在
if(null == file){
logger.error("文件不存在!");
throw new FileNotFoundException("文件不存在!");
}
//获得文件名
String fileName = file.getName();
//判断文件是否是excel文件
if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
logger.error(fileName + "不是excel文件");
throw new IOException(fileName + "不是excel文件");
}
}
private static Workbook getWorkBook(File file) {
//获得文件名
String fileName = file.getName();
//创建Workbook工作薄对象,表示整个excel
Workbook workbook = null;
try {
//获取excel文件的io流
InputStream is = new FileInputStream(file);
//根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
if(fileName.endsWith(xls)){
//2003
workbook = new HSSFWorkbook(is);
}else if(fileName.endsWith(xlsx)){
//2007
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
logger.info(e.getMessage());
}
return workbook;
}
private static String getCellValue(Cell cell){
String cellValue = "";
if(cell == null){
return cellValue;
}
//把数字当成String来读,避免出现1读成1.0的情况
if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
cell.setCellType(Cell.CELL_TYPE_STRING);
}
//判断数据的类型
switch (cell.getCellType()){
case Cell.CELL_TYPE_NUMERIC: //数字
cellValue = String.valueOf(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING: //字符串
cellValue = String.valueOf(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BOOLEAN: //Boolean
cellValue = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_FORMULA: //公式
cellValue = String.valueOf(cell.getCellFormula());
break;
case Cell.CELL_TYPE_BLANK: //空值
cellValue = "";
break;
case Cell.CELL_TYPE_ERROR: //故障
cellValue = "非法字符";
break;
default:
cellValue = "未知类型";
break;
}
return cellValue;
}
}
网友评论