ExtJS实现Excel导出

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. 使用POI组件实现excel导出功能

//获取问题列表
List targetStockList = 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调用此函数,实现Excel的导出

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';
};




你可能感兴趣的:(开发相关)