Excel 工具类

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import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
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.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import cn.com.amway.msgcenter.console.util.StringUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**

• excel工具类
• @helen

• */
  public class ExcelUtils {
  private static final Logger logger = LoggerFactory.getLogger(ExcelUtils.class);

  /**

  • Read the Excel 2020
  • @param path the path of the excel file
  • @return

  • @throws IOException
    */
    private static List<List<String>> readXlsx(InputStream is) throws IOException {
    XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
    // Read the Sheet
    XSSFSheet xssfSheet=null;
    XSSFRow xssfRow=null;
    List<List<String>> list=new ArrayList<List<String>>();
    for (int numSheet = 0; numSheet < xssfWorkbook.getNumberOfSheets(); numSheet++) {
    xssfSheet = xssfWorkbook.getSheetAt(numSheet);

    if (xssfSheet == null) {
        continue;
    }
    
    // Read the Row
    for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) {
        xssfRow = xssfSheet.getRow(rowNum);
        if (xssfRow != null) {
            list.add(parseRow(xssfRow));
        }
    }

    }
    return list;
    }

  /**

  • Read the Excel 2003-2007
  • @param path the path of the Excel
  • @return

  • @throws IOException
    */
    private static List<List<String>> readXls(InputStream is) throws IOException {
    HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
    // Read the Sheet
    HSSFSheet hssfSheet=null;
    HSSFRow hssfRow=null;
    List<List<String>> list=new ArrayList<List<String>>();;
    for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
    hssfSheet = hssfWorkbook.getSheetAt(numSheet);
    if (hssfSheet == null) {
    continue;
    }

    // Read the Row
    for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
        hssfRow = hssfSheet.getRow(rowNum);
        if(null!=hssfRow){
            list.add(parseRow(hssfRow));
        }
    }

    }
    return list;
    }

  private static List<String> parseRow(HSSFRow hssfRow){
  Iterator<Cell> iterator=hssfRow.cellIterator();
  List<String> list=new ArrayList<String>();
  while(iterator.hasNext()){
  list.add(getValue((HSSFCell)iterator.next()));
  }
  return list;
  }

  private static List<String> parseRow(XSSFRow xssfRow){
  Iterator<Cell> iterator=xssfRow.cellIterator();
  List<String> list=new ArrayList<String>();
  while(iterator.hasNext()){
  list.add(getValue((XSSFCell)iterator.next()));
  }
  return list;
  }

  @SuppressWarnings("static-access")
  private static String getValue(XSSFCell xssfRow) {
  if (xssfRow.getCellType() == xssfRow.CELL_TYPE_BOOLEAN) {
  return String.valueOf(xssfRow.getBooleanCellValue());
  } else if (xssfRow.getCellType() == xssfRow.CELL_TYPE_NUMERIC) {
  return String.valueOf(xssfRow.getNumericCellValue());
  } else {
  if(StringUtils.isEmpty(xssfRow.getStringCellValue())){
  return null;
  }else{
  return String.valueOf(xssfRow.getStringCellValue());
  }

  }

  }

  @SuppressWarnings("static-access")
  private static String getValue(HSSFCell hssfCell) {
  if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
  return String.valueOf(hssfCell.getBooleanCellValue());
  } else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
  return String.valueOf(hssfCell.getNumericCellValue());
  } else {
  if(StringUtils.isEmpty(hssfCell.getStringCellValue())){
  return null;
  }else{
  return String.valueOf(hssfCell.getStringCellValue());
  }
  }
  }

  /**

  • 导出xlsx文件
  • @param fileName 文件名
  • @param sheetName 表格名
  • @param list 数据
    */
    public static void writeXlsxByCache(String fileName, String sheetName, List<String> headList, List<List<String>> list) throws Exception{
    Workbook wb = new SXSSFWorkbook(500);
    try {
    Sheet sheet = wb.createSheet(sheetName);
    List<String> strList = null;
    Row row = null;
    Cell cell = null;
    addHead(sheet, headList);
    for (int i = 0; i < list.size(); i++) {
    row = sheet.createRow(i + 1);
    strList = list.get(i);
    for (int j = 0; j < strList.size(); j++) {
    cell = row.createCell(j);
    cell.setCellValue(strList.get(j));
    }
    }
    FileOutputStream outputStream = new FileOutputStream(fileName);
    wb.write(outputStream);
    outputStream.close();
    } catch (FileNotFoundException e) {
    logger.error("创建文件出现异常:" + e.getMessage(), e);
    throw e;
    } catch (IOException e) {
    logger.error("打开文件流出现异常:" + e.getMessage(), e);
    throw e;
    } finally {
    if (null != wb) {
    try {
    wb.close();
    } catch (IOException e) {
    logger.error("关闭文件出现异常:" + e.getMessage(), e);
    }
    }
    }
    }

  /**

  • 导出xlsx文件
  • @param fileName 文件名
  • @param sheetName 表格名

  • @param list 数据
    */
    public static void writeXlsxByCache(String fileName, String sheetName, List<String> head, List<?> list,Class clazz) throws Exception{
    XSSFWorkbook wb = new XSSFWorkbook();
    SXSSFWorkbook swb = new SXSSFWorkbook(wb,500,true,true);
    try {
    Sheet sheet = swb.createSheet(sheetName);
    String fieldName;
    Method method;
    String methodEnd;
    Row row = null;
    Cell cell = null;
    addHead(sheet, head);
    Object object;
    String str=null;
    for(int i = 0; i < list.size(); i++){
    row = sheet.createRow(i + 1);

        for (int j = 0; j < head.size(); j++) {
            fieldName=head.get(j);
            methodEnd=fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
            method=clazz.getMethod("get"+methodEnd);
            object=method.invoke(list.get(i));
            if(null==object){
                str="";
            }else{
                str=String.valueOf(object);
            }
            cell = row.createCell(j);
            cell.setCellValue(str);
        }
    }
     FileOutputStream outputStream = new FileOutputStream(fileName);
     swb.write(outputStream);
     outputStream.close();
     swb.close();
     wb.close();

    } catch (Exception e) {
    logger.error("打开文件流出现异常:" + e.getMessage(), e);
    throw e;
    } finally {
    }
    }

  public static void addHead(Sheet sheet, List<String> headList) {
  Row row = null;
  Cell cell = null;
  row = sheet.createRow(0);
  for (int i = 0; i < headList.size(); i++) {
  cell = row.createCell(i);
  cell.setCellValue(headList.get(i));
  }

  }

}

Excel 工具类

标签：add   ogg   文件   mes   actor   org   rownum   mode   creates   

原文地址：https://blog.51cto.com/7218743/2544684