JSF 2.0在当前会话中获取xhtml页面的内容

问题描述

我正在尝试使用飞碟将JSF页面转换为PDF.

I am trying to convert a JSF Page to PDF with Flying Saucer.

@ManagedBean
@SessionScoped
public class ReportController {
    ...
    public void createPDF() {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ExternalContext externalContext = facesContext.getExternalContext();
        try {
        ITextRenderer renderer = new ITextRenderer();
        renderer.setDocument(new URL("http://myserver.com/report.xhtml").toString());
        renderer.layout();
        HttpServletResponse response = (HttpServletResponse) externalContext.getResponse();
        response.reset();
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition", "inline; filename="report.pdf");
        OutputStream browserStream = response.getOutputStream();
        renderer.createPDF(browserStream);
        } catch (Exception ex) {
            ...
        }
        facesContext.responseComplete();
    }
}

在/report.xhtml页面中，我有一些backing bean参数，这些值应该出现在pdf中.但是他们没有.如果我访问xhtml页面，则值正确显示.我认为这是因为renderer.setDocument(String uri)为从指定的URL加载文档创建了新的连接(和新的会话).如何在当前会话中获取xhtml页面内容(包含所有参数值)?

In the /report.xhtml page I have some backing bean parameters, which values should appear in the pdf. But they does not. If I access the xhtml page, then values showing correctly.I think this is because renderer.setDocument(String uri) creates new connection (and new session) for load document from specified url. How can I get xhtml page content within my current session (with all parameters values)?

推荐答案

获取 HttpSession 通过 ExternalContext#getSession() 并将其ID添加为jsessionid URL路径片段.

Grab the HttpSession by ExternalContext#getSession() and add its ID as jsessionid URL path fragment.

HttpSession session = (HttpSession) externalContext.getSession(true);
String url = "http://myserver.com/report.xhtml;jsessionid=" + session.getId();
// ...

请注意，查询字符串(如果有的话)应该在此之后而不是之前.

Please note that the query string, if any, should come there after and not there before.

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