一篇在一个Excel表中创建多个sheet的代码

 package projectUtil;

 import org.apache.commons.lang3.StringUtils;
 import org.apache.poi.hssf.usermodel.*;
 import org.apache.poi.ss.usermodel.HorizontalAlignment;
 import org.apache.poi.ss.usermodel.VerticalAlignment;

 import java.util.List;
 import java.util.Map;

 /**
  * 创建Excel表
  * @author tian
  * @date 2019/3/2315:46
  */
 public class WorkbookUtil {
     private HSSFWorkbook workbook = new HSSFWorkbook();// 创建一个Excel文件

     public HSSFWorkbook getWorkbook() {
         return this.workbook;
     }

     public HSSFSheet writeExcel(List<Map<String, Object>> list, List<String> head, String sheetName) {
         HSSFSheet sheet;// 创建一个Excel的Sheet
         if (!StringUtils.isBlank(sheetName)) {
             sheet = workbook.createSheet(sheetName);// 创建一个Excel的Sheet
         } else {
             sheet = workbook.createSheet("Sheet");// 创建一个Excel的Sheet
         }
         HSSFRow row4 = sheet.createRow(0);

         HSSFCellStyle style4 = workbook.createCellStyle();
         style4.setAlignment(HorizontalAlignment.CENTER);//水平居中
         style4.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
         style4.setWrapText(true);//自动换行
         style4.setAlignment(HorizontalAlignment.CENTER);//水平居中
         style4.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中
         HSSFFont font4 = workbook.createFont();
         // font.setFontName("华文行楷");//设置字体名称
         font4.setFontHeightInPoints((short) 12);//设置字号
         // font4.setBold( true);
         style4.setFont(font4);
         for (int i = 0; i < head.size(); i++
         ) {
             sheet.setColumnWidth(i, 20 * 256);
             HSSFCell cell4_1 = row4.createCell(i);
             cell4_1.setCellValue(head.get(i));
             cell4_1.setCellStyle(style4);
         }
         for (int i = 0; i < list.size(); i++) {
             HSSFRow row5 = sheet.createRow(i + 1);
             for (int y = 0; y < head.size(); y++
             ) {
                 HSSFCell cell5_1 = row5.createCell(y);
                 cell5_1.setCellValue(list.get(i).get(head.get(y)) == null ? "" : list.get(i).get(head.get(y)) + "");
                 cell5_1.setCellStyle(style4);
             }

         }

         return sheet;
     }

 }

　　　　自己写的工具类，可以参考一下，如果有bug希望各位大侠指教。

    List<Map<String, Object>> rows = new ArrayList<>();
         List<Map<String, Object>> zifu = new ArrayList<>();
         List<Map<String, Object>> yinhang = new ArrayList<>();
         for (Map one : list) {
             Integer state = (Integer) one.get("state");
             Map<String, Object> reMap = new LinkedHashMap<>();
             reMap.put("提现编号", one.get("id"));
             reMap.put("用户ID", one.get("userId"));
             reMap.put("用户名称", one.get("name"));
             reMap.put("用户手机号", one.get("phone"));
             reMap.put("银行卡户主名称", one.get("userName"));
             reMap.put("银行", one.get("bankName"));
             reMap.put("所属支行", one.get("subBranchName"));
             reMap.put("银行卡号", one.get("cardNumber"));
             reMap.put("提现金额", one.get("arrivalAmountMoney"));
             reMap.put("提现状态", state == -1 ? "处理中" : state == 1 ? "已处理" : state == 0 ? "待处理" : state == 2 ? "信息错误" : "千万不要打款");
             reMap.put("支付宝账号", one.get("withdraw"));
             reMap.put("提现方式", (Integer) one.get("withdrawType") == 0 ? "支付宝" : "银行卡");
             reMap.put("备注", one.get("remark"));
             reMap.put("打款进度", "");
             rows.add(reMap);
             if ((Integer) one.get("withdrawType") == 0) {//支付宝提现
                 Map<String, Object> ss = reMap;
                 ss.remove("银行卡户主名称", one.get("userName"));
                 ss.remove("银行", one.get("bankName"));
                 ss.remove("银行卡号", one.get("cardNumber"));
                 ss.remove("所属支行", one.get("subBranchName"));
                 zifu.add(ss);
             }
             if ((Integer) one.get("withdrawType") == 1) {//银行卡提现
                 Map<String, Object> ss = reMap;
                 ss.remove("支付宝账号", one.get("withdraw"));
                 yinhang.add(ss);
             }
         }
         List<String> head = new ArrayList<>();
         head.add("提现编号");
         head.add("用户ID");
         head.add("用户名称");
         head.add("用户手机号");
         head.add("银行卡户主名称");
         head.add("银行");
         head.add("所属支行");
         head.add("银行卡号");
         head.add("提现金额");
         head.add("提现状态");
         head.add("支付宝账号");
         head.add("提现方式");
         head.add("备注");
         head.add("打款进度");
         WorkbookUtil workbookUtil = new WorkbookUtil();
         HSSFSheet sheet1 = workbookUtil.writeExcel(rows, head, "用户总提现");
         sheet1.setColumnWidth(5,30 * 256);
         sheet1.setColumnWidth(6,30 * 256);
         sheet1.setColumnWidth(7,30 * 256);
         List<String> head1= (List<String>) ((ArrayList<String>) head).clone();
         head1.remove(10);
         HSSFSheet sheet2 = workbookUtil.writeExcel(yinhang, head1, "银行卡提现");
         sheet2.setColumnWidth(5,30 * 256);
         sheet2.setColumnWidth(6,30 * 256);
         sheet2.setColumnWidth(7,30 * 256);
         List<String> head2=(List<String>) ((ArrayList<String>) head).clone();
         head2.remove(4);
         head2.remove(4);
         head2.remove(4);
         head2.remove(4);
         HSSFSheet sheet3 = workbookUtil.writeExcel(zifu, head2, "支付宝提现");
         // 第六步，将文件存到指定位置
         ServletOutputStream out = response.getOutputStream();
         try {
             response.setContentType("application/vnd.ms-excel;charset=ISO8859-1");
             response.setHeader("Content-Disposition", "attachment;filename=" + new String("用户提现".getBytes("UTF-8"), "ISO8859-1") + new SimpleDateFormat("yyyy-MM-dd->HH").format(new Date()) + ".xls");
             workbookUtil.getWorkbook().write(out);
         } catch (Exception e) {
             e.printStackTrace();
         } finally {
             out.close();
         }
         return;

　　使用的方法片段。记录一下