java poi解析上传的Excel文件
package com.zhl.push.Utils; /**
* @Author TAO
* @ClassName ExcelData
* @Description TODO
* @Date 2019/1/9 15:02
* @Version 1.0
*/ import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile; import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List; /**
* 解析excel 上传数据
*/
public class AnalysisExcelData { /**
* @Author
* @Description //TODO
* @Date 2019/8/15 12:14
* @Param file ：上传的excel文件
* @return * @param null
*/
public static List<List> getExcelData(MultipartFile file) throws IOException {
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<List> list = new ArrayList<>();
if (workbook != null) {
for (int sheetNum = 0; 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();
//循环除了所有行,如果要循环除第一行以外的就firstRowNum+1
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();
//获得当前行的列数
int lastCellNum = row.getLastCellNum();
if (lastCellNum > 0) {
ArrayList<Object> cellValues = new ArrayList<>();
//循环当前行
for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) {
Cell cell = row.getCell(cellNum);
cellValues.add(getCellValue(cell));
}
list.add(cellValues);
}
}
}
}
return list;
} /**
* 检查文件
*
* @param file
* @throws IOException
*/
public static void checkFile(MultipartFile file) throws IOException {
//判断文件是否存在
if (null == file) {
System.err.println("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")) {
System.err.println("不是excel文件");
}
} 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")) {
//2007 及2007以上
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
e.getMessage();
}
return workbook;
} public static String getCellValue(Cell cell) {
String cellValue = "";
if (cell == null) {
return cellValue;
}
//判断数据的类型
//判断数据的类型
switch (cell.getCellTypeEnum()) {
case NUMERIC: //数字
cellValue = stringDateProcess(cell);
break;
case STRING: //字符串
cellValue = String.valueOf(cell.getStringCellValue());
break;
case BOOLEAN: //Boolean
cellValue = String.valueOf(cell.getBooleanCellValue());
break;
case FORMULA: //公式
cellValue = String.valueOf(cell.getCellFormula());
break;
case BLANK: //空值
cellValue = "";
break;
case ERROR: //故障
cellValue = "非法字符";
break;
default:
cellValue = "未知类型";
break;
}
return cellValue;
} public static String stringDateProcess(Cell cell) {
String result = new String();
if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
SimpleDateFormat sdf = null;
if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
sdf = new SimpleDateFormat("HH:mm");
} else {// 日期
sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
}
Date date = cell.getDateCellValue();
result = sdf.format(date);
} else if (cell.getCellStyle().getDataFormat() == 58) {
// 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
double value = cell.getNumericCellValue();
Date date = org.apache.poi.ss.usermodel.DateUtil
.getJavaDate(value);
result = sdf.format(date);
} else {
double value = cell.getNumericCellValue();
CellStyle style = cell.getCellStyle();
DecimalFormat format = new DecimalFormat();
String temp = style.getDataFormatString();
// 单元格设置成常规
if (temp.equals("General")) {
format.applyPattern("#");
}
result = format.format(value);
} return result;
} public static InputStream convertorStream(Workbook workbook) {
InputStream in = null;
try {
//临时缓冲区
ByteArrayOutputStream out = new ByteArrayOutputStream();
//创建临时文件
workbook.write(out);
byte[] bookByteAry = out.toByteArray();
in = new ByteArrayInputStream(bookByteAry);
} catch (Exception e) {
e.printStackTrace();
}
return in;
} }