java日常工具类之Excel工具类

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import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * Excel工具类
 *
 * @author lp
 */
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 (DateUtil.isCellDateFormatted(xssfCell)) {
                Date date = DateUtil.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());
        }
    }
    public static int writeExcelOs(String[][] content,String savaPath) {
        byte[] data = null;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        OutputStream os=null;
        SXSSFWorkbook workBook = null;
        int rutle=0;
        try {

            workBook = new SXSSFWorkbook();
            os=new FileOutputStream(savaPath);
            org.apache.poi.ss.usermodel.Sheet sheet=workBook.createSheet();
            workBook.setSheetName(0,"sheet1");
            //
            for (int i = 0; i < content.length; i++) {
                Row row = sheet.createRow(i);
                for (int j = 0; j < content[i].length; j++) {
                    row.createCell(j).setCellValue(content[i][j]);
                }


            }

            workBook.write(os);
            os.flush();
            os.close();
            rutle=1;


        } catch (IOException e) {
            e.printStackTrace();
        }  finally {
            try {
                bos.close();
                //os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return rutle;
    }
}

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