ExtJS是一种基于客户端开发的AJAX应用，是一个与后台技术无关的前台ajax框架。由于项目需求，我们需要实现Excel的导出功能，前台界面是用ExtJS实现。如何实现呢？
1.POI组建实现
//获取问题列表 ListtargetStockList = suggestionService.getSuggestionList(map); //创建一个新的Excel HSSFWorkbook workBook = new HSSFWorkbook(); //创建sheet页 HSSFSheet sheet = workBook.createSheet(); //sheet页名称 workBook.setSheetName(0, "targetStockList"); //创建header页 HSSFHeader header = sheet.getHeader(); //设置标题居中 header.setCenter("标题"); //设置第一行为Header HSSFRow row = sheet.createRow(0); HSSFCell cell0 = row.createCell(Short.valueOf("0")); HSSFCell cell1 = row.createCell(Short.valueOf("1")); HSSFCell cell2 = row.createCell(Short.valueOf("2")); // 设置字符集 cell0.setEncoding(HSSFCell.ENCODING_UTF_16); cell1.setEncoding(HSSFCell.ENCODING_UTF_16); cell2.setEncoding(HSSFCell.ENCODING_UTF_16); cell0.setCellValue("问题标题"); cell1.setCellValue("问题描述"); cell2.setCellValue("反馈时间"); if(targetStockList != null && !targetStockList.isEmpty()) { for(int i = 0; i < targetStockList.size(); i++) { Suggestion targetStock = targetStockList.get(i); row = sheet.createRow(i + 1); cell0 = row.createCell(Short.valueOf("0")); cell1 = row.createCell(Short.valueOf("1")); cell2 = row.createCell(Short.valueOf("2")); // 设置字符集 cell0.setEncoding(HSSFCell.ENCODING_UTF_16); cell1.setEncoding(HSSFCell.ENCODING_UTF_16); cell2.setEncoding(HSSFCell.ENCODING_UTF_16); cell0.setCellValue(targetStock.getType()); cell1.setCellValue(targetStock.getContent()); cell2.setCellValue(targetStock.getPublishTime()); sheet.setColumnWidth((short) 0, (short) 4000); sheet.setColumnWidth((short) 1, (short) 4000); sheet.setColumnWidth((short) 2, (short) 4000); } } //通过Response把数据以Excel格式保存 response.reset(); response.setContentType("application/msexcel;charset=UTF-8"); try { response.addHeader("Content-Disposition", "attachment;filename=\"" + new String(("用户意见信息表" + ".xls").getBytes("GBK"), "ISO8859_1") + "\""); OutputStream out = response.getOutputStream(); workBook.write(out); out.flush(); out.close(); } catch (Exception e) { e.printStackTrace(); } return null;
2.EXTJS 调用函数
我们知道在界面上通过一个按钮实现Excel的导出，ExtJS的按钮一般都是通过Ext.Ajax.request的异步请求实现数据提交的。但是在这里我们不能使用异步调用，我们需要在直接提示给用户是否保存或打开此文档。如何实现呢？
其实很简单，我们如果了解了ExtJS就是Javascript开发的，我们就能够很容易实现此功能了。我们在按钮的触发事件中写入此段代码就能实现Excel的函数调用了。
// 初始化 Excel导出 的按钮 var exportExcel = Ext.get('exportExcel'); exportExcel.on('click', exportButtonClick); function exportButtonClick (){ window.location.href = Ext.CONTEXT + '/admin/suggestion.do?method=exportTargetList';};
// 初始化 Excel导出 的按钮 var exportExcel = Ext.get('exportExcel'); exportExcel.on('click', exportButtonClick); function exportButtonClick (){ window.location.href = Ext.CONTEXT + '/admin/suggestion.do?method=exportTargetList';}; 