如何在新选项卡中打开PDF文件

Question

我正在使用JSF，我想在单击按钮时在新选项卡中打开一个PDF文件。

XHTML

<p:commandButton onclick="this.form.target = '_blank'"
                 actionListener="#{managedBean.openFile(file)}"
                 ajax="false" />

管理bean

public void openFile( File file ) {
FacesContext facesContext = FacesContext.getCurrentInstance();
        ExternalContext externalContext = facesContext.getExternalContext();
        HttpServletResponse response = (HttpServletResponse) externalContext.getResponse();
        BufferedInputStream input = null;
        BufferedOutputStream output = null;
        try {
            // Open file.
            input = new BufferedInputStream(new FileInputStream(file), 10240);
            // Init servlet response.
            response.reset();
            // lire un fichier pdf
            response.setHeader("Content-type", "application/pdf"); 
            response.setContentLength((int)file.length());
            response.setHeader("Content-disposition", "attachment; filename=" + node.getNomRepertoire());
            response.setHeader("pragma", "public");
            output = new BufferedOutputStream(response.getOutputStream(), 10240);
            // Write file contents to response.
            byte[] buffer = new byte[10240];
            int length;
            while ((length = input.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }
            // Finalize task.
            output.flush();
        } finally {
            // Gently close streams.
                output.close();
                input.close();
        }
}

问题是当我使用这个方法时，它只下载文件。为了你的信息，我跟随这个帖子:http://balusc.omnifaces.org/2006/05/pdf-handling.html

Answer 1

你应该改变

response.setHeader("Content-disposition", "attachment; filename=" + node.getNomRepertoire());

到

response.setHeader("Content-disposition", "inline; filename=" + node.getNomRepertoire());

所以，用inline代替attachment。

参见:

• 如何强制文件在浏览器中打开而不是下载(pdf)?