用于解决在UI 上 上传excel , 然后解析
依赖：
<!-- ############ poi ############## -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency> <dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency> <dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.17</version>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
POIUtils:
package com.sea.shan.utils; import static org.hamcrest.CoreMatchers.nullValue; import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.security.interfaces.RSAMultiPrimePrivateCrtKey;
import java.util.ArrayList;
import java.util.List; import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
/**
* *************************************************************************
* <PRE>
* @ClassName: : POIUtils
*
* @Description: :
*
* @Creation Date : 23 Apr 2019 2:38:24 PM
*
* @Author : Sea
*
*
* </PRE>
**************************************************************************
*/
public class POIUtils {
private static org.slf4j.Logger logger = LoggerFactory.getLogger(POIUtils.class);
private final static String xls = "xls";
private final static String xlsx = "xlsx"; /**
* 读入excel文件，解析后返回
* @param file
* @throws IOException
*/
public static List<String[]> readExcel(MultipartFile 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
List<String[]> list = new ArrayList<String[]>();
if(workbook != null){
for(int sheetNum = ;sheetNum < workbook.getNumberOfSheets();sheetNum++){
//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();
//循环除了第一行的所有行
for(int rowNum = firstRowNum+;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();
//获得当前行的列数
int lastCellNum = row.getPhysicalNumberOfCells();
String[] cells = new String[row.getPhysicalNumberOfCells()];
//循环当前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
cells[cellNum] = getCellValue(cell);
}
list.add(cells);
}
}
workbook.close();
}
return list;
} /**
*
* @param file
* @throws IOException
*/
public static void checkFile(MultipartFile 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.getOriginalFilename();
//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");
}
} /**
*
* @param file
* @return
*/
public static Workbook getWorkBook(MultipartFile file) {
//获得文件名
String fileName = file.getOriginalFilename();
//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 = file.getInputStream();
//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)){
//
workbook = new HSSFWorkbook(is);
}else if(fileName.endsWith(xlsx)){
//
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
logger.info(e.getMessage());
}
return workbook;
} /**
*
* @param filePath
* @return
*/
public static Workbook getWorkBook(String filePath) {
//获得文件名
String fileName = filePath; logger.error("file name is : {}",fileName);
//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
FileInputStream is = new FileInputStream(filePath);
//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)){
//
workbook = new HSSFWorkbook(is);
}else if(fileName.endsWith(xlsx)){
//
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
logger.info(e.getMessage());
}
return workbook;
} private static DataFormatter dataFormatter =null;
static {
dataFormatter = new DataFormatter();
}
/**
* POI new AIP ,it can change all stype cell value to String
* @param cell
* @return
*/
public static String getCellValues(Cell cell){
String cellValue = dataFormatter.formatCellValue(cell);
return cellValue;
} /**
*
* @param cell
* @return
*/
public 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;
}
}
test:
package com.sea.shan.poi; import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.junit.Test; import com.sea.shan.utils.POIUtils; public class POIUtilsTest { @Test
public void testName() throws Exception {
Workbook workBook = POIUtils.getWorkBook("/home/sea/Desktop/Test/airline-airport-country-code.xlsx"); Sheet sheetAt0 = workBook.getSheetAt();
int lastRowNum = sheetAt0.getLastRowNum(); for (int i = ; i <= lastRowNum; i++) {
// get per row
Row row = sheetAt0.getRow(i); if(row==null){
continue;
} // String cellValue0 = POIUtils.getCellValue(row.getCell(0));
// String cellValue1 = POIUtils.getCellValue(row.getCell(1));
// String cellValue0 = POIUtils.getCellValues(row.getCell(0));
// String cellValue1 = POIUtils.getCellValues(row.getCell(1));
String cellValue0 = new DataFormatter().formatCellValue(row.getCell()); String cellValue1 = new DataFormatter().formatCellValue(row.getCell()); System.err.println(cellValue0+"="+cellValue1); }
}
}