JAVA匯出excel 直接彈出下載框
阿新 • • 發佈：2019-01-31
效果展示：
1.首先準備jar包
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.8</version>
</dependency>2.前臺頁面訪問 匯出excel的介面
通過window.location.href來訪問介面，直接彈出下載框
// 匯出資料 $('#outExcel').click(function(){ var status = $('#status').val(); window.location.href = baseUrl + '/order/excel/orderrdExportExcel?status="+status; });
3.後臺通過獲取response中的OutStream 流 ，將excel檔案寫到流裡面，程式碼如下:
@GetMapping("/orderrdExportExcel") public void grouppExportExcel(HttpServletRequest request,Orderrd orderrd,HttpServletResponse response) throws Exception{ List<Orderrd> grouppList = orderrdService.selectAllForLayUI(orderrd); //匯出檔案的標題 String title = "退款訂單"+DateUtil.getSimpleDate01(new Date())+".xlsx"; //設定表格標題行 String[] headers = new String[] {"序號","流水編號","使用者賬號","使用者姓名","收款賬號","賬戶餘額","退款金額","手續費","申請時間"}; List<Object[]> dataList = new ArrayList<Object[]>(); Object[] objs = null; for (int i = 0; i < grouppList.size(); i++) { objs = new Object[headers.length]; objs[0] = 0;//設定序號,在工具類中會出現 objs[1] = grouppList.get(i).getOrderrdCode(); objs[2] = grouppList.get(i).getUsername(); objs[3] = grouppList.get(i).getUserName(); objs[4] = grouppList.get(i).getAccount(); objs[5] = grouppList.get(i).getPremain(); objs[6] = grouppList.get(i).getPricePre(); objs[7] = grouppList.get(i).getPricePay(); objs[8] = grouppList.get(i).getCreateTime(); dataList.add(objs);//資料新增到excel表格 } //使用流將資料匯出 OutputStream out = null; try { //防止中文亂碼 String headStr = "attachment; filename=\"" + new String( title.getBytes("gb2312"), "ISO8859-1" ) + "\""; response.setContentType("octets/stream"); response.setContentType("APPLICATION/OCTET-STREAM"); response.setHeader("Content-Disposition", headStr); out = response.getOutputStream(); ExportExcelSeedBack ex = new ExportExcelSeedBack(title, headers, dataList);//沒有標題 ex.export(out); out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); } }
4.工具類如下：
import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import javax.servlet.http.HttpServletResponse; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFFont; import org.apache.poi.hssf.usermodel.HSSFRichTextString; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.util.HSSFColor; public class ExportExcelSeedBack { //顯示的匯出表的標題 private String title; //匯出表的列名 private String[] rowName ; private List<Object[]> dataList = new ArrayList<Object[]>(); HttpServletResponse response; //構造方法，傳入要匯出的資料 public ExportExcelSeedBack(String title,String[] rowName,List<Object[]> dataList){ this.dataList = dataList; this.rowName = rowName; this.title = title; } /* * 匯出資料 * */ public void export(OutputStream out) throws Exception{ try{ HSSFWorkbook workbook = new HSSFWorkbook(); // 建立工作簿物件 HSSFSheet sheet = workbook.createSheet(title); // 建立工作表 // 產生表格標題行 // HSSFRow rowm = sheet.createRow(0); // HSSFCell cellTiltle = rowm.createCell(0); //sheet樣式定義【getColumnTopStyle()/getStyle()均為自定義方法 - 在下面 - 可擴充套件】 HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//獲取列頭樣式物件 HSSFCellStyle style = this.getStyle(workbook); //單元格樣式物件 // sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1)));//合併單元格 // cellTiltle.setCellStyle(columnTopStyle); // cellTiltle.setCellValue(title); // 定義所需列數 int columnNum = rowName.length; HSSFRow rowRowName = sheet.createRow(0); // 在索引2的位置建立行(最頂端的行開始的第二行) // 將列頭設定到sheet的單元格中 for(int n=0;n<columnNum;n++){ HSSFCell cellRowName = rowRowName.createCell(n); //建立列頭對應個數的單元格 cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //設定列頭單元格的資料型別 HSSFRichTextString text = new HSSFRichTextString(rowName[n]); cellRowName.setCellValue(text); //設定列頭單元格的值 cellRowName.setCellStyle(columnTopStyle); //設定列頭單元格樣式 } //將查詢出的資料設定到sheet對應的單元格中 for(int i=0;i<dataList.size();i++){ Object[] obj = dataList.get(i);//遍歷每個物件 HSSFRow row = sheet.createRow(i+1);//建立所需的行數（從第二行開始寫資料） for(int j=0; j<obj.length; j++){ HSSFCell cell = null; //設定單元格的資料型別 if(j == 0){ cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC); cell.setCellValue(i+1); }else{ cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING); if(!"".equals(obj[j]) && obj[j] != null){ cell.setCellValue(obj[j].toString()); //設定單元格的值 } } cell.setCellStyle(style); //設定單元格樣式 } } //讓列寬隨著匯出的列長自動適應 for (int colNum = 0; colNum < columnNum; colNum++) { int columnWidth = sheet.getColumnWidth(colNum) / 256; for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) { HSSFRow currentRow; //當前行未被使用過 if (sheet.getRow(rowNum) == null) { currentRow = sheet.createRow(rowNum); } else { currentRow = sheet.getRow(rowNum); } // if (currentRow.getCell(colNum) != null) { // HSSFCell currentCell = currentRow.getCell(colNum); // if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) { // int length = currentCell.getStringCellValue().getBytes().length; // if (columnWidth < length) { // columnWidth = length; // } // } // } if (currentRow.getCell(colNum) != null) { HSSFCell currentCell = currentRow.getCell(colNum); if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) { int length = 0; try { length = currentCell.getStringCellValue().getBytes().length; } catch (Exception e) { //e.printStackTrace(); } if (columnWidth < length) { columnWidth = length; } } } } if(colNum == 0){ sheet.setColumnWidth(colNum, (columnWidth-2) * 256); }else{ sheet.setColumnWidth(colNum, (columnWidth+4) * 256); } } if(workbook !=null){ try{ workbook.write(out); }catch (IOException e) { e.printStackTrace(); } } }catch(Exception e){ e.printStackTrace(); } finally{ out.close(); } } /* * 列頭單元格樣式 */ public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) { // 設定字型 HSSFFont font = workbook.createFont(); //設定字型大小 font.setFontHeightInPoints((short)11); //字型加粗 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //設定字型名字 font.setFontName("Courier New"); //設定樣式; HSSFCellStyle style = workbook.createCellStyle(); //設定底邊框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //設定底邊框顏色; style.setBottomBorderColor(HSSFColor.BLACK.index); //設定左邊框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //設定左邊框顏色; style.setLeftBorderColor(HSSFColor.BLACK.index); //設定右邊框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //設定右邊框顏色; style.setRightBorderColor(HSSFColor.BLACK.index); //設定頂邊框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //設定頂邊框顏色; style.setTopBorderColor(HSSFColor.BLACK.index); //在樣式用應用設定的字型; style.setFont(font); //設定自動換行; style.setWrapText(false); //設定水平對齊的樣式為居中對齊; style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設定垂直對齊的樣式為居中對齊; style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; } /* * 列資料資訊單元格樣式 */ public HSSFCellStyle getStyle(HSSFWorkbook workbook) { // 設定字型 HSSFFont font = workbook.createFont(); //設定字型大小 //font.setFontHeightInPoints((short)10); //字型加粗 //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //設定字型名字 font.setFontName("Courier New"); //設定樣式; HSSFCellStyle style = workbook.createCellStyle(); //設定底邊框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //設定底邊框顏色; style.setBottomBorderColor(HSSFColor.BLACK.index); //設定左邊框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //設定左邊框顏色; style.setLeftBorderColor(HSSFColor.BLACK.index); //設定右邊框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //設定右邊框顏色; style.setRightBorderColor(HSSFColor.BLACK.index); //設定頂邊框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //設定頂邊框顏色; style.setTopBorderColor(HSSFColor.BLACK.index); //在樣式用應用設定的字型; style.setFont(font); //設定自動換行; style.setWrapText(false); //設定水平對齊的樣式為居中對齊; style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設定垂直對齊的樣式為居中對齊; style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; } }