ExcelUtil.java
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package com.example.dahua.utils;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.usermodel.HSSFCell;
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.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
/**
* excel工具类
*/
@Slf4j
public class ExcelUtil {
public static final String OFFICE_EXCEL_2003_POSTFIX = "xls";
public static final String OFFICE_EXCEL_2010_POSTFIX = "xlsx";
public static final String EMPTY = "";
public static final String POINT = ".";
public static SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
/**
* 获得path的后缀名
* @param path
* @return
*/
public static String getPostfix(String path){
if(path==null || EMPTY.equals(path.trim())){
return EMPTY;
}
if(path.contains(POINT)){
return path.substring(path.lastIndexOf(POINT)+1,path.length());
}
return EMPTY;
}
/**
* 单元格格式
* @param hssfCell
* @return
*/
@SuppressWarnings({ "static-access", "deprecation" })
public static String getHValue(HSSFCell hssfCell){
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
String cellValue = "";
if(HSSFDateUtil.isCellDateFormatted(hssfCell)){
Date date = HSSFDateUtil.getJavaDate(hssfCell.getNumericCellValue());
cellValue = sdf.format(date);
}else{
DecimalFormat df = new DecimalFormat("#.##");
cellValue = df.format(hssfCell.getNumericCellValue());
String strArr = cellValue.substring(cellValue.lastIndexOf(POINT)+1,cellValue.length());
if(strArr.equals("00")){
cellValue = cellValue.substring(0, cellValue.lastIndexOf(POINT));
}
}
return cellValue;
} else {
return String.valueOf(hssfCell.getStringCellValue());
}
}
/**
* 单元格格式
* @param xssfCell
* @return
*/
public static String getXValue(XSSFCell xssfCell){
if (xssfCell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return String.valueOf(xssfCell.getBooleanCellValue());
} else if (xssfCell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
String cellValue = "";
if(XSSFDateUtil.isCellDateFormatted(xssfCell)){
Date date = XSSFDateUtil.getJavaDate(xssfCell.getNumericCellValue());
cellValue = sdf.format(date);
}else{
DecimalFormat df = new DecimalFormat("#.##");
cellValue = df.format(xssfCell.getNumericCellValue());
String strArr = cellValue.substring(cellValue.lastIndexOf(POINT)+1,cellValue.length());
if(strArr.equals("00")){
cellValue = cellValue.substring(0, cellValue.lastIndexOf(POINT));
}
}
return cellValue;
} else {
return String.valueOf(xssfCell.getStringCellValue());
}
}
/**
* 自定义xssf日期工具类
*
*/
static class XSSFDateUtil extends DateUtil {
protected static int absoluteDay(Calendar cal, boolean use1904windowing) {
return DateUtil.absoluteDay(cal, use1904windowing);
}
}
}