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我正面临这个错误 - “应用程序/pdf”不是受支持的 mime 类型。我正在尝试将 p:editor 的内容保存为 pdf 到我的本地机器。

进口

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import org.primefaces.model.DefaultStreamedContent;
import org.primefaces.model.StreamedContent;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;
import org.springframework.stereotype.Component;

import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.html.simpleparser.HTMLWorker;
import com.lowagie.text.pdf.PdfWriter;

功能

        public StreamedContent getFile() {
                try {
                     ByteArrayOutputStream os = new ByteArrayOutputStream();

                     Document document = new Document(PageSize.LETTER);
                     PdfWriter pdfWriter = PdfWriter.getInstance(document, os);
                     document.open();
                     document.addCreationDate();
                    HTMLWorker htmlWorker = new HTMLWorker(document);
                     String str = "<html><head></head><body>"+ this.getMessage() +"</body></html>";
                     htmlWorker.parse(new StringReader(str));
                     document.close();

                     InputStream is = new ByteArrayInputStream(os.toByteArray());

                     file = new DefaultStreamedContent(is, "application/pdf", "ohyeah.pdf");
                     return file;
                  }
                  catch (Exception e) {
            return null;
                  }
            }

在以下精彩帖子之后：https ://forum.primefaces.org/viewtopic.php?f=3&t=21342&p=170835#p170835

请帮忙 ！

编辑 - - - - - - - - -

如果我使用 mime 类型作为图像/jpg，那么我也会收到相同的错误。问题看起来像别的东西。谁能给我指点一下。

javax.portlet.faces.BridgeException: java.lang.IllegalArgumentException: image/jpg is not a supported mime type
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1 回答 1

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感谢 Melloware 指出错误与 portlet 相关。

如果有人面临同样的问题，这是对我有用的解决方案。根据您的需要进行调整。

public StreamedContent getFile() throws IOException, DocumentException {
        final PortletResponse portletResponse = (PortletResponse) FacesContext.getCurrentInstance()
                .getExternalContext().getResponse();
        final HttpServletResponse res = PortalUtil.getHttpServletResponse(portletResponse);
        res.setContentType("application/pdf");
        res.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        //res.setHeader("Content-Disposition", "attachment; filename=\".pdf\"");
        res.setHeader("Content-Disposition", "attachment; filename="+subject+".pdf");
        res.setHeader("Refresh", "1");
        res.flushBuffer();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        OutputStream out=res.getOutputStream();
        Document document = new Document(PageSize.LETTER);
        PdfWriter.getInstance(document, baos);
        document.open();
        document.addCreationDate();
        HTMLWorker htmlWorker = new HTMLWorker(document);
        String str =this.getMessage();
        htmlWorker.parse(new StringReader(str));
        document.close();
        baos.writeTo(out);
        out.flush();
        out.close();
        return null;
    }
于 2018-10-11T15:39:10.837 回答