java导出数据库中Excel表格数据的方法_JAVA教程

java导出数据库中Excel表格数据的方法

2020-12-19 14:06众星捧月 JAVA教程

这篇文章主要为大家详细介绍了java导出数据库中Excel表格数据的方法，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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;

									  }

									}