Spring MVC 3.0 Jasper-Reports 4在浏览器中定向HTML报告


问题内容

我正在使用Spring MVC
3和JasperReports。我已经创建了一些不错的PDF和Xls报告,没有任何问题。我想做的是在屏幕上为用户显示创建的HTML报告,作为他们获取的报告的预览,并包装在网站模板中。有没有办法做到这一点?

我尚未找到有关此主题的任何教程/文章,但确实找到了针对Java开发人员的有关JasperReports
3.5的书。(对此我是菜鸟,请耐心等待。)我的理解是,我必须将输入流重定向到浏览器。我认为必须有一种更简单的方法!还有一种从中剥离HTML报告页眉和页脚的方法。

任何帮助,将不胜感激!


问题答案:

而不是使用另一个框架来解决我的问题。我这样解决了:

@RequestMapping(value = "/report", method = RequestMethod.POST)
public String htmlReport(@RequestParam(value = "beginDate") Date begin,
        @RequestParam(value = "endDate", required = false) Date end,
        ModelMap map) {

    try {

        // Setup my data connection
        OracleDataSource ds = new OracleDataSource();
        ds.setURL("jdbc:oracle:thin:user/password@10.10.10.10:1521:tst3");

        Connection conn = ds.getConnection();

        // Get the jasper report object located in package org.dphhs.tarts.reports
        // Load it 
        InputStream reportStream = this.getClass().getResourceAsStream("reports/tartsCostAllocation.jasper");
        JasperReport jasperReport = (JasperReport) JRLoader.loadObject(reportStream);

        // Populate report with data
        JasperPrint jasperPrint =
            JasperFillManager.fillReport(jasperReport, new HashMap(), conn);

        // Create report exporter to be in Html
        JRExporter exporter = new JRHtmlExporter();

        // Create string buffer to store completed report
        StringBuffer sb = new StringBuffer();

        // Setup report, no header, no footer, no images for layout
        exporter.setParameter(JRHtmlExporterParameter.HTML_HEADER, "");
        exporter.setParameter(JRHtmlExporterParameter.HTML_FOOTER, "");
        exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN, Boolean.FALSE);

        // When report is exported send to string buffer
        exporter.setParameter(JRExporterParameter.OUTPUT_STRING_BUFFER, sb);
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

        // Export the report, store to sb
        exporter.exportReport();

        // Use Jsoup to clean the report table html to output to browser
        Whitelist allowedHtml = new Whitelist();
        allowedHtml.addTags("table", "tr", "td", "span");
        allowedHtml.addTags("table", "style", "cellpadding", "cellspacing", "border", "bgcolor");
        allowedHtml.addAttributes("tr", "valign");
        allowedHtml.addAttributes("td", "colspan", "style");
        allowedHtml.addAttributes("span", "style");
        String html = Jsoup.clean(sb.toString(), allowedHtml);

        // Add report to map
        map.addAttribute("report", html);

    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return "costallocation/report";
}