poi 匯出，將資料庫中的資料讀取到excel 表格中
阿新 • • 發佈：2019-01-10
專案用的框架springMVC
poi匯出 前端程式碼如下：
<button class=\"btn btn-primary\" onclick=\"ToExcel(this)\">匯出</button>
function ToExcel(t){
window.location.href="${ctx}/main/getExcel;
};Controller層程式碼
@ResponseBody @RequestMapping("/getExcel") public void getExcel( HttpServletRequest request,HttpServletResponse response){ try { ToExcel.getExcel(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }
在業務層首先建立兩個集合以方便存取資料，在方法中閒設定表格樣式，再設定自己需要的表格寬度，我這裡用的是四個寬度的表格，再將查詢的資料插入到表格中就可以直接匯出自己需要的表格資料
業務層程式碼：
private static Set<MixDef> NSmix = new LinkedHashSet<MixDef>(); private static List<MixDef> mixs = new ArrayList<MixDef>(); public static void getExcel(String org_id,String org_name,String dim1,HttpServletRequest request,HttpServletResponse response) throws Exception { NSmix.clear(); mixs.clear(); //建立excel文件 HSSFWorkbook wb = new HSSFWorkbook(); //建立一個excel標籤頁 HSSFSheet sheet = wb.createSheet(); //設定樣式 HSSFCellStyle style = wb.createCellStyle(); style.setLocked(false);//可編輯 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中 style.setWrapText(true);//自動換行 style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下邊框 style.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左邊框 style.setBorderTop(HSSFCellStyle.BORDER_THIN);//上邊框 style.setBorderRight(HSSFCellStyle.BORDER_THIN);//右邊框 HSSFCellStyle style2 = wb.createCellStyle(); style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中 style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中 style2.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下邊框 style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左邊框 style2.setBorderTop(HSSFCellStyle.BORDER_THIN);//上邊框 style2.setBorderRight(HSSFCellStyle.BORDER_THIN);//右邊框 HSSFCellStyle style3 = wb.createCellStyle(); style3.setWrapText(true);//自動換行 style3.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中 style3.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下邊框 style3.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左邊框 style3.setBorderTop(HSSFCellStyle.BORDER_THIN);//上邊框 style3.setBorderRight(HSSFCellStyle.BORDER_THIN);//右邊框 HSSFCellStyle style4 = wb.createCellStyle(); style4.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中 style4.setWrapText(true);//自動換行 style4.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下邊框 style4.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左邊框 style4.setBorderTop(HSSFCellStyle.BORDER_THIN);//上邊框 style4.setBorderRight(HSSFCellStyle.BORDER_THIN);//右邊框 HSSFFont font = wb.createFont(); font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗體顯示 font.setFontHeightInPoints((short) 12); style.setFont(font); HSSFFont font0 = wb.createFont(); font0.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗體顯示 font0.setFontHeightInPoints((short) 16); style4.setFont(font0); //列寬 sheet.setColumnWidth(0, 3000); sheet.setColumnWidth(1, 9000); sheet.setColumnWidth(2, 9000); sheet.setColumnWidth(3, 8000); CellRangeAddress region = new CellRangeAddress(0,0,0,3); sheet.addMergedRegion(region); HSSFRow row0 = sheet.createRow(0); row0.setHeightInPoints(30); //建立列 HSSFCell cell0 = row0.createCell(0); //寫入內容 String times=new SimpleDateFormat("yyyy").format(new Date()); cell0.setCellValue("南山醫院"+times+"年度綜合目標管理責任書－"+org_name+""); //設定樣式 cell0.setCellStyle(style4); //建立第二行 放表頭 HSSFRow row = sheet.createRow(1); row.setHeightInPoints(20); //建立列 HSSFCell cell = row.createCell(1); cell = row.createCell(0); cell.setCellValue("序號"); //設定樣式 cell.setCellStyle(style); cell = row.createCell(1); cell.setCellValue("指標名稱"); cell.setCellStyle(style); cell = row.createCell(2); cell.setCellValue("考核辦法"); cell.setCellStyle(style); cell = row.createCell(3); cell.setCellValue("指標說明"); cell.setCellStyle(style); //查資料 String sql="select D.kpi_id,D.kpi_name,D.method,D.score,D.des,L.kpi_dim_value_name,D.parameter,V.score,D.visible,D.depth from "+TableName.kpi_def+" D left join "+TableName.org_assess_rel+" R on D.kpi_id=R.kpi_id left join "+TableName.kpi_dim_value+" L on R.assess_id=L.kpi_dim_value left join "+TableName.average_value+" V on R.kpi_id=V.kpi_id and V.dim1='"+dim1+"' where R.org_id="+org_id+" and R.status=1 order by D.par_kpi_id"; List<Object[]> list = DataUtil.query(GwnBaseDefaultData.sqlName, sql); 讀取list集合內容，通過for迴圈取出資料 for(int j=0;j<list.size();j++){ MixDef mix = new MixDef(); if(list.get(j)[0]!=null){ mix.setId(list.get(j)[0].toString()); //kpi_id }else{ mix.setId(""); } if(list.get(j)[1]!=null){ mix.setName(list.get(j)[1].toString()); //kpi_name }else{ mix.setName(""); } if(list.get(j)[2]!=null){ mix.setBenefit(list.get(j)[2].toString()); //par_kpi_name(用實體類MixDef中的Benefit儲存par_kpi_id_name) }else{ mix.setBenefit(""); } if(list.get(j)[3]!=null){ mix.setDetail(list.get(j)[3].toString()); //detail }else{ mix.setDetail(""); } NSmix.add(mix); } Iterator<MixDef> it = NSmix.iterator(); while (it.hasNext()) { mixs.add(it.next()); } //將資料寫入 for (int i = 0; i < mixs.size(); i++) { row = sheet.createRow(i + 2); //序號 cell=row.createCell(0); cell.setCellValue(i+1); cell.setCellStyle(style2); cell= row.createCell(1); cell.setCellValue(mixs.get(i).getName()); cell.setCellStyle(style2); cell.setCellStyle(style3); cell=row.createCell(2); cell.setCellValue(mixs.get(i).getBenefit()); cell.setCellStyle(style3); cell=row.createCell(3); cell.setCellValue(mixs.get(i).getDepth()); cell.setCellStyle(style3); } String time= new SimpleDateFormat("yyyy-MM-dd_HH：mm").format(new Date()); String filename=""+org_name+"-績效考核_"+time+".xls"; OutputStream output = response.getOutputStream(); response.reset(); response.setHeader("Content-disposition", "attachment;filename="+new String(filename.getBytes("gb2312"), "ISO8859-1")); response.setContentType("application/msexcel"); wb.write(output); output.close(); }