java中export方法如何实现导出excel文件

//导出文件接口 public String export(){ return this.myExport(exportList); }

private String myExport(List list){ com.bronzesoft.power.tools.json.JSONObject info = new com.bronzesoft.power.tools.json.JSONObject(); try{ List headList = new ArrayList(Arrays.asList("年", "月", "部门","部门负责人","经营值","收入", "支出","填报工时","标准工时","经营参数")); Commonutil.export(list,headList,"部门经营总览导出"); info = Commonutil.setInfo(info,"部门经营总览导出"); }catch (Exception e){ LogUtil.error(this.getClass().getName()+".exportExcel()", e); } return info.toString(); }

public static  boolean export(List list,List headList,String fileName){ return myExport(list,headList,fileName,com.bronzesoft.rdm.platform.util.Constants.PATH + com.bronzesoft.power.platform.Constants.TEMPFOLDER_DIR ); } //将list导出为excel，文件名为fileName public static  boolean myExport(List list,List headList,String fileName,String path){ try{ if(!checkListAndHead(list,headList)){ LogUtil.info( "head的长度有问题,导出的文件不正确" ); } File file = new File(path + File.separator + fileName + ".xlsx"); if(!file.exists()) { file.createNewFile(); } //创建对应excel文件,存储路径path待确定 XSSFWorkbook workBook = new XSSFWorkbook(); //创建一个excel的sheet页 XSSFSheet sheet = workBook.createSheet(fileName); XSSFRow row = null; XSSFCell cell = null; Map styles = StyleUtil.createStyles(workBook); //表头样式 CellStyle headCenterIndex = styles.get("headCenter"); //列的样式居中，背景颜色为白色 CellStyle center = styles.get("centerWhite"); row = sheet.createRow(0); //表头数据 for (int i = 0; i < headList.size(); i++) { //创建列 cell = row.createCell(i); //设置列的value cell.setCellValue(headList.get(i)); //设置列的样式 cell.setCellStyle(headCenterIndex); } //表格数据 //写入表格数据 String codeName = ""; int rownum = 1; T obj = null; for(int i = 0; i < list.size(); i++){ obj = list.get(i); if(null != obj){ Field[] fields = obj.getClass().getDeclaredFields(); row = sheet.createRow(rownum); for(int j = 0; j< fields.length; j++){ fields[j].setAccessible(true); codeName = String.valueOf(fields[j].get(obj)); //创建第j列 cell = row.createCell(j); cell.setCellValue(Commonutil.getStringVal(codeName)); cell.setCellStyle(center); } } rownum++; } // //i代表列，设置列的宽度 // for (int i = 0; i < headList.size(); i++) { // if(i == 0){ // sheet.setColumnWidth(i, 2000); // }else if(i == 1 || i == 3){ // sheet.setColumnWidth(i, 6000); // }else{ // sheet.setColumnWidth(i, 4000); // } // } //将文件写到临时目录 FileOutputStream out = new FileOutputStream(file); workBook.write(out); }catch (Exception e){ LogUtil.error(fileName + "export失败" ); } return true; } //检查head的size是否符合规范 public static  boolean checkListAndHead(List list,List headList){ if(list.size()>0){ T t = list.get(0); if(getColumnCount(t) != headList.size()){ LogUtil.info( "head的长度有问题" ); return false; } } return true; } //获取一个对象成员变量的个数 public static  int getColumnCount(T t){ Field[] fields = t.getClass().getDeclaredFields(); int count = fields.length; return count; }

public static JSONObject setInfo(JSONObject info,String fileName) throws Exception { Storage s = Commonutil.getDefaultStorage(); info.put("port", String.valueOf(s.getPort())); info.put("dirAddress", Base64Util.encode(com.bronzesoft.rdm.platform.util.Constants.PATH)); info.put("address", Base64Util.encode(com.bronzesoft.power.platform.Constants.TEMPFOLDER_DIR + File.separator + fileName + ".xlsx")); info.put("name", Base64Util.encode(fileName)); info.put("extendName", "xlsx"); return info; }

function doExport(){ synAjax.tabCall("com.bronzesoft.rdm.SeDeptTotalTab", "export", null, function(data){ doDownload(data); }); } function doDownload(data){ console.log('data',data) r = eval('('+data+')'); $("#_file_dir").val(r.dirAddress); $("#_file_address").val(r.address); $("#_file_name").val(r.name); $("#_file_extname").val(r.extendName); if ($.browser.safari) { $("#_file_downform").attr("target", ""); } var servlet = powerPath + "download"; $("#_file_downform").attr("action", servlet).submit(); }