java导出数据库中Excel表格数据的方法

本篇文章基于java把数据库中的数据以Excel的方式导出，欢迎各位大神吐槽：

1、基于maven jar包引入如下：　　

   net.sourceforge.jexcelapi
   jxl
   2.6.12
  

2、首先创建数据库对应的实体类VO ：UserVO（具体代码省略）；

3、确定导出Excel内的title列，并放在数组里：String[] （具体代码省略）；

4、编写导出Excel的方法：

传入参数：

Excel名称，Excel内的title列数组String[]，数据集合List

package bp.util;

import java.io.OutputStream;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Field;

import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.VerticalAlignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;

public class ExportExcel {

  public final static String exportExcel(String fileName, String[] Title, List listContent,
      HttpServletResponse response) {
    String result = "Excel文件导出成功！";
    try {
      OutputStream os = response.getOutputStream();
      response.reset();
      response.setHeader("Content-disposition",
          "attachment; filename=" + new String(fileName.getBytes("GB2312"), "ISO8859-1"));
      response.setContentType("application/msexcel");
      WritableWorkbook workbook = Workbook.createWorkbook(os);

      WritableSheet sheet = workbook.createSheet("Sheet1", 0);
      jxl.SheetSettings sheetset = sheet.getSettings();
      sheetset.setProtected(false);

      WritableFont BoldFont = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD);
      WritableCellFormat wcf_center = new WritableCellFormat(BoldFont);
      wcf_center.setBorder(Border.ALL, BorderLineStyle.THIN);
      wcf_center.setVerticalAlignment(VerticalAlignment.CENTRE);
      wcf_center.setAlignment(Alignment.CENTRE);
      wcf_center.setWrap(true);

      for (int i = 0; i < Title.length; i++) {
        sheet.setColumnView(i, 20);
        sheet.addCell(new Label(i, 0, Title[i], wcf_center));
      }
      Field[] fields = null;
      int i = 1;
      for (Object obj : listContent) {
        fields = obj.getClass().getDeclaredFields();
        int j = 0;
        for (Field v : fields) {
          v.setAccessible(true);
          Object va = v.get(obj);
          if (va == null) {
            va = "";
          }
          sheet.addCell(new Label(j, i, va.toString(), wcf_center));
          j++;
        }
        i++;
      }
      workbook.write();
      workbook.close();

    } catch (Exception e) {
      result = "Excel文件导出失败";
      e.printStackTrace();
    }
    return result;
  }
}

在需要导出数据的时候调用此方法即可；

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。