Gwt 同步 文件下载 实现

client

?Button.addClickHandler(new ClickHandler()

{

@Override

public void onClick(ClickEvent event)

{

String select = getSelect();

String url = GWT.getHostPageBaseURL()+"xx.do?select="+select;

final FormPanel form = new FormPanel();

form.setAction(url);

form.setMethod(FormPanel.METHOD_POST);

RootPanel.get().add(form);

FormElement formElement = FormElement.as(form.getElement());

formElement.submit();

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}

});

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server:

private void writeXml(Document doc, HttpServletResponse response) throws IOException, ServletException

{

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?

String fileName = "xx.xml";response.setContentType("application/force-download;charset=UTF-8");response.addHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");

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BufferedInputStream bis = null;BufferedOutputStream bos = null;try{String docStr = "xxx";bis = new BufferedInputStream(new StringInputStream(docStr, "utf-8"));bos = new BufferedOutputStream(response.getOutputStream());int bytesRead = 0;byte[] buffer = new byte[8192];while ((bytesRead = bis.read(buffer, 0, 8192)) != -1){bos.write(buffer, 0, bytesRead);}} catch (FileNotFoundException e){log.error(e);} finally{if (bos != null){bos.flush();bos.close();}}

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}

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