相关疑难解决方法(0)

我谷歌的错误信息getOutputStream() has already been called for this response ,许多人说这是因为空格或换行符后<%或%>,但在我的代码中,没有空格或换行符.我在linux上使用tomcat6.

<%@
    page import="java.servlet.*,
    javax.servlet.http.*,
    java.io.*,
    java.util.*,
    com.lowagie.text.pdf.*,
    com.lowagie.text.*"
    %><%
    response.setContentType("application/pdf");
    Document document = new Document();
    try{
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        PdfWriter.getInstance(document, buffer);
        document.open();
        PdfPTable table = new PdfPTable(2);
        table.addCell("1");
        table.addCell("2");
        table.addCell("3");
        table.addCell("4");
        table.addCell("5");
        table.addCell("6");
        document.add(table);
        document.close();
        DataOutput dataOutput = new DataOutputStream(response.getOutputStream());
        byte[] bytes = buffer.toByteArray();
        response.setContentLength(bytes.length);
        for(int i = 0; i < bytes.length; i++)
        {
        dataOutput.writeByte(bytes[i]);
        }
    }catch(DocumentException e){
        e.printStackTrace();
    }

%>

〜

org.apache.jasper.JasperException: java.lang.IllegalStateException: …

我想在我的JSF页面上显示PDF文件，我已经检查了如何在iFrame的jsf页面中显示pdf文档，但是我不想在iframe上显示它（因为它将生成滚动条）。我只想将pdf显示在图像上的页面上，并能够为其提供宽度和高度。

编辑嗨BalusC。我仍然无法显示pdf内联。这是我的代码。

@WebServlet(name = "pdfHandler", urlPatterns = {"/pdfHandler/*"})
public class pdfHandler extends HttpServlet {

    private static final int DEFAULT_BUFFER_SIZE = 10240;

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String requestedFile = request.getPathInfo();
        File file = new File("/Users/KingdomHeart/Downloads/Test/pdf/" + requestedFile);
        response.reset();
        response.setContentType("application/pdf");
        response.setBufferSize(DEFAULT_BUFFER_SIZE);
        response.setHeader("Content-Length", String.valueOf(file.length()));
        response.setHeader("Content-Disposition", "inline; filename=\"" + file.getName() + "\"");
        BufferedInputStream input = null;
        BufferedOutputStream output = null;
        try{
            input = new BufferedInputStream(new FileInputStream(file), DEFAULT_BUFFER_SIZE);
            output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);
            byte[] buffer = new …