java基础篇 -- 导出excel表格数据

　　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：

　　

 <dependency>
     <groupId>net.sourceforge.jexcelapi</groupId>
     <artifactId>jxl</artifactId>
     <version>2.6.12</version>
 </dependency>

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<UserVO>

 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；