下面是一個使用action listener 的一個例子.
添加下面的代碼到backing bean的action listener中:
public?void?viewPdf(ActionEvent?event)?{
?String?filename?=?"filename.pdf";
?//?use?your?own?method?that?reads?file?to?the?byte?array
?byte[]?pdf?=?getTheContentOfTheFile(filename);?
?FacesContext?faces?=?FacesContext.getCurrentInstance();
?HttpServletResponse?response?=?(HttpServletResponse)?faces.getExternalContext().getResponse();
?response.setContentType("application/pdf");
?response.setContentLength(pdf.length);
?response.setHeader(?"Content-disposition",?"inline;?filename=\""+fileName+"\"");
?try?{
??ServletOutputStream?out;
??out?=?response.getOutputStream();
??out.write(pdf);
?}?catch?(IOException?e)?{
??e.printStackTrace();
?}
?faces.responseComplete();
} |