spring+springmvc+hibernate利用poi实现导出Excel功能

我不是女神ヾ 2022-06-08 07:54 167阅读 0赞

转自：[http://www.cnblogs.com/baizhanshi/p/5667751.html][http_www.cnblogs.com_baizhanshi_p_5667751.html]

1 主要相关jar包：[http://pan.baidu.com/s/1bKLscQ][http_pan.baidu.com_s_1bKLscQ] 密码：y1yj  
ooxml-schemas-1.3.jar  
poi-3.14.jar  
poi-ooxml-3.14.jar  
xmlbeans-2.6.0.jar

2 主要工具类：ExportExcel

package cn.com.utils;
    
    import java.lang.reflect.Field;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    
    
    
    
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.CellStyle;
    import org.apache.poi.ss.usermodel.Font;
    import org.apache.poi.ss.usermodel.IndexedColors;
    import org.apache.poi.ss.usermodel.Row;
    import org.apache.poi.ss.usermodel.Sheet;
    import org.apache.poi.ss.usermodel.Workbook;
    import org.apache.poi.xssf.usermodel.XSSFSheet;
    import org.apache.poi.xssf.usermodel.XSSFWorkbook;
    
    /** * 导出Excel文档工具类 * * @author yanzi * @date 2017-9-19 */
    public class ExportExcel {
    
      /** * 创建excel文档， * * @param list 数据 * @param keys list中map的key数组集合 * @param columnNames excel的列名 * @throws Exception */
      public static Workbook createWorkBook(List<?> lists, String[] keys, String columnNames[], Class<?> clazz) throws Exception {
         List<Map<String, Object>> listMap = initData(lists, clazz);
         // 创建excel工作簿
        //Workbook wb = new HSSFWorkbook();
        // 创建第一个sheet（页），并命名
        //Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet= wb.createSheet(listMap.get(0).get("sheetName").toString());
        // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
        for (int i = 0; i < keys.length; i++) { 
          sheet.setColumnWidth(i, (int)35.7 * 150);
        }
        // 创建第一行
        Row row = sheet.createRow(0);
    
        // 创建两种单元格格式
        CellStyle cs = wb.createCellStyle();
        CellStyle cs2 = wb.createCellStyle();
    
        // 创建两种字体
        Font f = wb.createFont();
        Font f2 = wb.createFont();
    
        // 创建第一种字体样式（用于列名）
        f.setFontHeightInPoints((short) 10);
        f.setColor(IndexedColors.BLACK.getIndex());
        f.setBoldweight(Font.BOLDWEIGHT_BOLD);
    
        // 创建第二种字体样式（用于值）
        f2.setFontHeightInPoints((short) 10);
        f2.setColor(IndexedColors.BLACK.getIndex());
    
        // 设置第一种单元格的样式（用于列名）
        cs.setFont(f);
        cs.setBorderLeft(CellStyle.BORDER_THIN);
        cs.setBorderRight(CellStyle.BORDER_THIN);
        cs.setBorderTop(CellStyle.BORDER_THIN);
        cs.setBorderBottom(CellStyle.BORDER_THIN);
        cs.setAlignment(CellStyle.ALIGN_CENTER);
    
        // 设置第二种单元格的样式（用于值）
        cs2.setFont(f2);
        cs2.setBorderLeft(CellStyle.BORDER_THIN);
        cs2.setBorderRight(CellStyle.BORDER_THIN);
        cs2.setBorderTop(CellStyle.BORDER_THIN);
        cs2.setBorderBottom(CellStyle.BORDER_THIN);
        cs2.setAlignment(CellStyle.ALIGN_CENTER);
        //设置列名
        for (int i = 0; i < columnNames.length; i++) { 
          Cell cell = row.createCell(i);
          cell.setCellValue(columnNames[i]);
          cell.setCellStyle(cs);
        }
        //设置每行每列的值
        for (int i = 1; i < listMap.size(); i++) { 
          // Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
          // 创建一行，在页sheet上
          Row row1 = sheet.createRow(i);
          // 在row行上创建一个方格
          for (int j = 0; j < keys.length; j++) { 
            Cell cell = row1.createCell(j);
            cell.setCellValue(listMap.get(i).get(keys[j]) == null ? " " : listMap.get(i).get(keys[j]).toString());
            cell.setCellStyle(cs2);
          }
        }
        return wb;
      }
    
      /** * 转换数据，把类型List<?> roomLists转化为List<Map<String, Object>>， * * @param list 原始数据 * @param clazz 反射类 * @param columnNames excel的列名 */
      private static List<Map<String, Object>> initData(List<?> lists, Class<?> clazz) throws Exception {
            List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("sheetName", "sheet1");
            listmap.add(map);
            Object object;
            Field[] fields = clazz.getDeclaredFields();
            for (int j = 0; j < lists.size(); j++) { 
                object = lists.get(j); 
              Map<String, Object> mapValue = new HashMap<>();
              mapValue.put("no", j+1);
              for (Field field : fields) {
                  field.setAccessible( true ); 
                  mapValue.put(field.getName(), field.get(object));
              }
              listmap.add(mapValue);
            }
            return listmap;
          }
    
    }

3 Controller

// 处理请求
    @RequestMapping("room/export")
        public String getRoomExportExcel2(String COName, String FullName, String Name, PageBean pageBean, HttpServletResponse response) throws Exception {
    
            //填充list数据
            SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
            String fileName = "导出房屋excel" + sf.format(new Date()) + ".xlsx";
    
            // 获取数据来源
            pageBean.setPageSize(101);
            PageBean result = personRoomDao.getRoomList(pageBean, COName, FullName, Name);
            List<RoomInfo> roomLists = result.getRows();
            String columnNames[] = { "序号", "房间号", "所属地区","所属社区", "社区结构", "修改时间"};  ;//列名
            String keys[] = {
       "no", "roomName", "regionName", "coName", "structName", "modifytime"};//map中的key
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            try {
            ExportExcel.createWorkBook(roomLists, keys, columnNames, RoomInfo.class).write(os);
            } catch (IOException e) {
              e.printStackTrace();
            }
            byte[] content = os.toByteArray();
            InputStream is = new ByteArrayInputStream(content);
            // 设置response参数，可以打开下载页面
            response.reset();
            response.setContentType("application/vnd.ms-excel;charset=utf-8");
            response.setHeader("Content-Disposition", "attachment;filename="+ new String(fileName.getBytes(), "iso-8859-1"));
            ServletOutputStream out = response.getOutputStream();
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            try {
              bis = new BufferedInputStream(is);
              bos = new BufferedOutputStream(out);
              byte[] buff = new byte[2048];
              int bytesRead;
              // Simple read/write loop.
              while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                bos.write(buff, 0, bytesRead);
              }
            } catch (final IOException e) {
              throw e;
            } finally {
              if (bis != null)
                bis.close();
              if (bos != null)
                bos.close();
            }
            return null;
        }

4 jsp调用：

<button class="btn btn-sm btn-info" type="button"
    style="vertical-align: top;" onclick="exportExcel(this)">
        <i class="fa fa-search"></i>导出Excel
    </button>
    
    function exportExcel(dom) {
        var rows = 10,
        COName=$.trim($("#COName").val()),
        FullName=$.trim($("#FullName").val()),
        Name=$.trim($("#Name").val());
        $(dom).attr("disabled", "disabled");
        window.open("export.action?COName=" + COName + "&FullName=" + FullName + "&Name=" +Name);
    }

5 效果(ie浏览器)  
![这里写图片描述][SouthEast]

[http_www.cnblogs.com_baizhanshi_p_5667751.html]: http://www.cnblogs.com/baizhanshi/p/5667751.html
[http_pan.baidu.com_s_1bKLscQ]: http://pan.baidu.com/s/1bKLscQ
[SouthEast]: /images/20220608/8cece340f6d046a6ba378e5474df96b8.png