POST请求下载文件方法-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_15147/article/details/82576865

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用POST请求让浏览器下载文件
方法1. 动态构造一个html Form表单元素,将参数隐藏在表单中通过post传过去
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var data = tableElement.data;
var columns = tableElement.columns;
var groupColumns = tableElement.groupColumns;

var url = 'servlet/exportMovementReport.do';
var name = 'download';
var keys = ['data', 'columns', 'groupColumns'];
var values = [Ext.encode(data), Ext.encode(columns), Ext.encode(groupColumns)];

var html = "";
html += "<html><head></head><body><form id='formId' name='formName' method='post' action='"
		+ url + "'>";
if (keys && values && (keys.length == values.length)) {
	for (var i = 0; i < keys.length; i++) {
		html += "<input type='hidden' name='" + keys[i] + "' value='"
				+ values[i] + "'/>";
	}
}
html += "</form><script type='text/javascript'>document.getElementById(\"formId\").submit()</script></body></html>";
window.open('#', name).document.write(html);

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方法2. 先在服务器端生成文件, 这样你就面临一个如何清除这些文件的问题
[url]http://www.sencha.com/forum/showthread.php?81897-FYI-Very-simple-approach-to-JS-triggered-file-downloads[/url]

[url]http://stackoverflow.com/questions/3499597/javascript-jquery-to-download-file-via-post-with-json-data[/url]

[url]http://www.sencha.com/forum/showthread.php?153253-How-to-download-a-file-using-Ext.Ajax-using-a-POST-call[/url]

其他参考：
用window.location.href=''方法打开页面下载打印数据
[url]http://yuzhijia88-126-com.iteye.com/blog/747142[/url]

用GET请求让浏览器下载文件
客户端：
很简单，就是拼凑服务器端的URL,然后window.open()就行
var url = getContextURL() + 'services/exportExcel?reportDate=20151110'
window.open(url);
服务器端，这里包含了使用一个excel模板来生成最终的文件:[/size]


	@GET
	@Path("/exportExcel")
	public Response exportExcel(@QueryParam("reportDate") String reportDate, @Context HttpServletResponse response) throws IOException, InvalidFormatException
	{
		List<Map<String, Object>> data = ...;
		Map<String,Object> dataMap = Maps.newHashMap();
		dataMap.put("notifications", data);
		dataMap.put("reportDate", reportDate);

        response.setContentType("application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment; filename=\"Export_Report.xls\"");
        try {

			InputStream is = new ClassPathResource("template/Export_Template.xls").getInputStream();

	        XLSTransformer transformer = new XLSTransformer();
	        org.apache.poi.ss.usermodel.Workbook wb = transformer.transformXLS(is, dataMap);
	        wb.write(response.getOutputStream());
		} catch (IOException e) {
			LOGGER.error("Failed to read template!", e);
			throw e;
		} catch (ParsePropertyException e) {
			LOGGER.error("Failed to read template!", e);
			throw e;
		} catch (InvalidFormatException e) {
			LOGGER.error("Failed to read template!", e);
			throw e;
		}
		return Response.ok().build();
	}