java - 应用程序未在服务器上生成报告

我有一个通过Java Web应用程序生成的JasperReports报告。位于我的本地主机页面上的应用程序：8084 / app / pages.jsp（发送到servlet的表单在哪里）完美地生成了报告，出现了问题，当我生成报告时，将其提供给了site.com/app/pages .jsp得到了这个结果，看来服务器没有解释该文件。 PDF或她的一代。

是运行apache的linux服务器

最佳答案

这来自一个旧项目，您添加response.setContentType("application/pdf");并将文件的字节写为输出。

public class ReportSintesiServlet extends HttpServlet {
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("application/pdf");
        Lookup<IReportGeneration> l = new Lookup<IReportGeneration>(true, IReportGeneration.class);
        IReportGeneration g = null;
        try {
            g = l.lookup();
        } catch (Exception ex) {
            return;
        }
        if (g != null) {
            String param = request.getParameter("idc");
            System.out.println("genero il report per idc " + param);
            Integer idc = Integer.parseInt(param);
            byte[] doc = (byte[]) g.generaSintesiAccordoIniziale(idc);
            if (doc != null) {
                FilePathManager fpm = new FilePathManager();
                String pathtofile = fpm.pathToNuovaSintesi(idc);
                File temp = new File(pathtofile);
                FileUtil.writeBytesToFile(temp, doc);
                response.addHeader("Content-Disposition", "attachment; filename=" + temp.getName());
                response.setContentLength((int) temp.length());
                FileInputStream fileInputStream = new FileInputStream(temp);
                OutputStream responseOutputStream = response.getOutputStream();
                int bytes;
                while ((bytes = fileInputStream.read()) != -1) {
                    responseOutputStream.write(bytes);
                }
            }
        }
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }
}

PS：我删除了一些对这种情况没有帮助的代码，因为您会看到您错过了错误管理逻辑的所有部分。