java导出包含多个sheet的Excel代码示例

HSSFSheet sheet = workbook.createSheet(sheettitle); 

try {   HSSFWorkbook workbook = new HSSFWorkbook();   OutputStream out = response.getOutputStream();   for(int j=0;j<n;j++){     BaseResult<List<T>> teasalList = service.select(teasal);     //接下来循环list放到Excel表中     if(teasalList.isSuccess()&&teasalList.getResult().size()>0){       //文件标题       SimpleDateFormat formatter1 = new SimpleDateFormat("yyyy-MM-dd");       String nowdate = formatter1.format(new Date());       String       String sheettitle = "sheet表名";       //设置表格标题行       String oneheaders = "首行标题" ;       String dateheaders = nowdate ;       String[] headers = new String[] {"列1","列2","列3","列4"};       List<Object[]> dataList = new ArrayList<Object[]>();       Object[] objs = null;       for(int i =0; i<3 ; i++){ //循环每一条数据         objs = new Object[headers.length];         objs[1] = "张三";  //姓名         objs[2] = "3"; //序号         //数据添加到excel表格         dataList.add(objs);       }       //使用流将数据导出       //防止中文乱码       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);       ExportExcelDownFee ex ;       ex = new ExportExcelDownFee(sheettitle, oneheaders, dateheaders,headers, dataList);//没有标题       ex.export(workbook,out);     }   }   workbook.write(out); //循环生成多个sheet之后在导出Excel  out.close(); //关闭流} catch (Exception e) {   e.printStackTrace(); }

public class ExportExcelDownFee {    //导出表的列名   private String[] rowName ;   //导出表的小标题   private String oneheaders;   //导出表的日期   private String dateheaders;   //sheet表表名   private String sheettitle;    private List<Object[]> dataList = new ArrayList<Object[]>();    HttpServletResponse response;      //构造方法2，传入要导出的数据   public ExportExcelDownFee( String sheettitle, String oneheaders, String dateheaders, String[] rowName,List<Object[]> dataList){     this.dataList = dataList;     this.oneheaders = oneheaders;     this.dateheaders = dateheaders;     this.rowName = rowName;     this.sheettitle = sheettitle;   }      /*    * 导出数据    * */   public void export(HSSFWorkbook workbook,OutputStream out) throws Exception{     try{       HSSFSheet sheet = workbook.createSheet(sheettitle);         // 创建工作表        HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象       HSSFCellStyle style = this.getStyle(workbook);         //单元格样式对象        //第一行       HSSFRow rowfirstName = sheet.createRow(0);       HSSFCell oneCellRowName = rowfirstName.createCell(0);        //创建列头对应个数的单元格       oneCellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);       //设置列头单元格的数据类型       HSSFRichTextString onetext = new HSSFRichTextString(oneheaders);       oneCellRowName.setCellValue(onetext);                 //设置列头单元格的值       //合并单元格CellRangeAddress构造参数依次表示起始行，截至行，起始列， 截至列        sheet.addMergedRegion(new CellRangeAddress(0,0,0,3));        oneCellRowName.setCellStyle(columnTopStyle);            //设置列头单元格样式              //第二行       HSSFRow rowDateName = sheet.createRow(1);       HSSFCell DateCellRowName = rowDateName.createCell(3);       DateCellRowName.setCellValue(dateheaders);       DateCellRowName.setCellStyle(columnTopStyle);               // 定义所需列数       int columnNum = rowName.length;       HSSFRow rowRowName = sheet.createRow(2);        // 在索引2的位置创建行(最顶端的行开始的第二行)        // 将列头设置到sheet的单元格中       for(int n=0;n<columnNum;n++){         HSSFCell cellRowName = rowRowName.createCell(n);        //创建列头对应个数的单元格         cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);       //设置列头单元格的数据类型         HSSFRichTextString text = new HSSFRichTextString(rowName[n]);         cellRowName.setCellValue(text);                 //设置列头单元格的值         cellRowName.setCellStyle(style);            //设置列头单元格样式       }        //将查询出的数据设置到sheet对应的单元格中       for(int i=0;i<dataList.size();i++){          Object[] obj = dataList.get(i);//遍历每个对象         HSSFRow row = sheet.createRow(i+3);//创建所需的行数（从第二行开始写数据）          for(int j=0; j<obj.length; j++){           HSSFCell cell = null;  //设置单元格的数据类型           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());            //设置单元格的值             }           }           cell.setCellStyle(style);                  //设置单元格样式         }       }              //让列宽随着导出的列长自动适应       for (int colNum = 0; colNum < columnNum; colNum++) {         int columnWidth = sheet.getColumnWidth(colNum) / 256;         for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {           HSSFRow currentRow;           //当前行未被使用过           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 = 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);         }       }      }catch(Exception e){       e.printStackTrace();     }   }    /*    * 列头单元格样式    */     public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {       // 设置字体      HSSFFont font = workbook.createFont();      //设置字体大小      font.setFontHeightInPoints((short)11);      //字体加粗      //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);      //设置字体名字       font.setFontName("宋体");      //设置样式;       HSSFCellStyle style = workbook.createCellStyle();      //在样式用应用设置的字体;       style.setFont(font);      //设置自动换行;       style.setWrapText(false);      //设置水平对齐的样式为居中对齐;       style.setAlignment(HSSFCellStyle.ALIGN_CENTER);      //设置垂直对齐的样式为居中对齐;       style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);       return style;    }    /*     * 列数据信息单元格样式    */    public HSSFCellStyle getStyle(HSSFWorkbook workbook) {      // 设置字体      HSSFFont font = workbook.createFont();      //设置字体名字       font.setFontName("宋体");      //设置样式;       HSSFCellStyle style = workbook.createCellStyle();      //设置底边框;       style.setBorderBottom(HSSFCellStyle.BORDER_THIN);      //设置底边框颜色;       style.setBottomBorderColor(HSSFColor.BLACK.index);      //设置左边框;        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);      //设置左边框颜色;       style.setLeftBorderColor(HSSFColor.BLACK.index);      //设置右边框;       style.setBorderRight(HSSFCellStyle.BORDER_THIN);      //设置右边框颜色;       style.setRightBorderColor(HSSFColor.BLACK.index);      //设置顶边框;       style.setBorderTop(HSSFCellStyle.BORDER_THIN);      //设置顶边框颜色;       style.setTopBorderColor(HSSFColor.BLACK.index);      //在样式用应用设置的字体;       style.setFont(font);      //设置自动换行;       style.setWrapText(false);      //设置水平对齐的样式为居中对齐;       style.setAlignment(HSSFCellStyle.ALIGN_CENTER);      //设置垂直对齐的样式为居中对齐;       style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);       return style;     } }