导出Excel

必需的4个类：操作工具类、excel工具类、注解类、导出报表类

操作工具类：

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.*;

import jxl.Sheet;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.UnderlineStyle;
import jxl.format.VerticalAlignment;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

import org.apache.commons.collections.CollectionUtils;
import org.apache.log4j.Logger;

/**

• excel 操作工具类
  */
  public class JxlUtil {

  private static final Logger LOGGER = Logger.getLogger(JxlUtil.class);

  //每个工作簿存放的记录数
  private static final int SHEET_SIZE = 50000;

  /**

  • 相关说明：在指定路径下生成excel文件

  • 业务逻辑：

  • 时间：2015年7月14日 下午10:59:18
    */
    public static void write(String savePath, String title, String sheetName, String[] heads, List dataList, int[] columnWidth) {
    File saveFile = new File(savePath);
    try {
    if (!saveFile.exists()) {
    WritableWorkbook workBook = Workbook.createWorkbook(saveFile);
    WritableSheet workSheet = null;

         int dataIndex = 0;
         int sheetIndex = 0;
         if (CollectionUtils.isNotEmpty(dataList)) {
             for (int row = 0; row < dataList.size(); row++) {
                 if (dataIndex % SHEET_SIZE == 0) {
                     workSheet = workBook.createSheet(sheetName + sheetIndex, sheetIndex);
                     workSheet.addCell(new Label(0, 0, title, getTitleHeaderFormat()));
                     //合并标题行
                     workSheet.mergeCells(0, 0, dataList.get(0).length - 1, 0);
    
                     if (heads != null && heads.length > 0) {
                         for (int col = 0; col < heads.length; col++) {
                             workSheet.addCell(new Label(col, 1, heads[col]));
                             workSheet.setColumnView(1, columnWidth[col]);
                         }
                     }
                     dataIndex = 0;
                     sheetIndex++;
                 }
    
                 String[] data = dataList.get(row);
                 for (int col = 0; col < data.length; col++) {
                     workSheet.addCell(new Label(col, dataIndex + 2, data[col]));
                 }
                 dataIndex++;
             }
         }
         workBook.write();
         workBook.close();
     } else {
         Workbook book = Workbook.getWorkbook(saveFile);
         Sheet sheet = book.getSheet(0);
         // 获取行
         int length = sheet.getRows();
         System.out.println(length);
         WritableWorkbook wbook = Workbook.createWorkbook(saveFile, book); // 根据book创建一个操作对象
         WritableSheet sh = wbook.getSheet(0);// 得到一个工作对象
    
         int dataIndex = 1;
         for (int row = 0; row < dataList.size(); row++) {
             String[] data = dataList.get(row);
             for (int col = 0; col < data.length; col++) {
                 sh.addCell(new Label(col, length + dataIndex, data[col]));
             }
             dataIndex++;
         }
         wbook.write();
         wbook.close();
     }
    

    } catch (IOException e) {
    LOGGER.error(e);
    } catch (WriteException e) {
    LOGGER.error(e);
    } catch (BiffException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }
    }

  /**

  • 相关说明：excel下载

  • 时间：2015年8月28日 下午3:47:00

  • @throws Exception
    */
    public static void export(OutputStream os, String title, String sheetName, List headList, List dataList, int[] columnWidth) throws Exception {
    WritableWorkbook workBook;
    try {
    workBook = Workbook.createWorkbook(os);
    WritableSheet workSheet = null;
    int dataIndex = 0;
    int sheetIndex = 0;
    if (CollectionUtils.isNotEmpty(dataList)) {
    for (int row = 0; row < dataList.size(); row++) {
    if (dataIndex % SHEET_SIZE == 0) {
    workSheet = workBook.createSheet(sheetName + sheetIndex, sheetIndex);
    //workSheet.addCell(new Label(0, 0, title, getTitleHeaderFormat()));
    //合并标题行
    //workSheet.mergeCells(0, 0, dataList.get(0).size() - 1, 0);

                 if (CollectionUtils.isNotEmpty(headList)) {
                     for (int headIndex = 0; headIndex < headList.size(); headIndex++) {
                         workSheet.addCell(new Label(headIndex, 0, headList.get(headIndex)));
                         if (columnWidth != null && columnWidth.length > 0) {
                             workSheet.setColumnView(0, columnWidth[headIndex]);
                         }
                     }
                 }
                 dataIndex = 0;
                 sheetIndex++;
             }
    
             List