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；