Question

我正在开发一个spring-mvc项目，我正在使用JasperReports进行报告。我有一个链接，生成pdf格式的报告。链接工作正常并生成报告，但问题是pdf报告未显示图像。来自我的jrxml文件的片段：

<frame>
    <reportElement x="0" y="0" width="70" height="67" uuid="0af2e978-7c0c-4805-afb4-4069d1297a12"/>
    <image onErrorType="Blank" evaluationTime="Report">
        <reportElement mode="Opaque" x="0" y="0" width="70" height="67" uuid="c572c836-8d67-480a-b1b1-d603940e6c74"/>
        <imageExpression><![CDATA["images/geLogo.jpg"]]></imageExpression>
    </image>
</frame>

我再次检查，图像出现在我项目的webapp / images文件夹中。我在jsp页面中使用了相同的图像，它正在工作。

用于从JasperReport生成pdf的代码：

try {
        JasperPrint print = service.loadReceipt(RECEIPT_NAME, paymentId);
        pdfFile = JasperExportManager.exportReportToPdf(print);
        OutputStream outStream = res.getOutputStream();
        res.setContentType("application/pdf");
        res.addHeader("Content-disposition", "inline; filename=Receipt.pdf");
        outStream.write(pdfFile);
        outStream.flush();
        outStream.close();
    }

你能告诉我为什么图像不会出现在pdf中，尽管在JasperReport Designer中以相同的路径显示图像。我在我的eclipse中使用了JasperReports插件来设计报告。我通过war文件在jboss 6.4中部署项目提前谢谢。

的 ------- -------- UPDATE
我从@ KDavid-Valerio的回答中得到了检查战争项目结构的想法。它与实际的项目结构不同。战争结构看起来像这样：

Project
    images
        image1.jpg
        image2.jpg
    WEB-INF
        classes
            reports
                report1.jrxml
                report2.jrxml

它似乎仍然不起作用。
的 ------- -------- UPDATE
填写碧玉报告的代码：

public JasperPrint loadReceipt(String reportName, String paymentId, String imagePath) {
        HashMap<String, Object> params = new HashMap<String, Object>();
        JasperReport report = null;
        JasperPrint print = null;

        try {
            if (jrReportMap == null) {
                jrReportMap = new HashMap<String, JasperReport>();
            }           

            if (jrReportMap.get(reportName) == null) {
                report = JasperCompileManager.compileReport(reportManager.load(reportName));
                jrReportMap.put(reportName, report);
                log.info(Logger.EVENT_SUCCESS, "--- Report Compilation done --- " + reportName);
            } else {
                report = jrReportMap.get(reportName);
                log.info(Logger.EVENT_SUCCESS, "--- Report already Compiled --- " + reportName);
            }

            params.put("paymentId", paymentId);
            params.put("realPath", imagePath);

            try {
                Connection conn = reportDataSource.getConnection();
                print = JasperFillManager.fillReport(report, params, conn);
                conn.close();
            } catch (SQLException e) {
                System.err.println("--- SQL ERR - to get connection -----");
                log.error(Logger.EVENT_FAILURE, "--- Report already Compiled --- " + reportName);
                e.printStackTrace();
            }
        } catch (JRException e1) {
            log.error(Logger.EVENT_FAILURE, "Oops... Something wrong while rendering the report !!!");
            e1.printStackTrace();
        }
        return print;
    }

Answer 1

而不是使用<imageExpression><![CDATA["images/geLogo.jpg"]]></imageExpression>

使用参数。。E.g，：

<imageExpression><![CDATA[$P{imagePath}]]></imageExpression>

imagePath它是一个String，包含WAR内部图像的相对URL。

例如，如果您的WAR具有以下结构：

 YourWebProject
      WebContent
           reports
                report1.jasper
                report2.jasper
                ...
                reportn.jasper
            images
                geLogo.jpg

填充imagePath参数时，必须为其指定相对于报告路径的图像路径。如果你想使用geLogo.jpg图像，它将是：

String imagePath = "../images/geLogo.jpg";

Answer 2

我使用ServletContext找到了解决这个问题的方法。

getRealPath()

自动装配此依赖关系，然后使用其方法byte[] pdfFile = null; String realPath = context.getRealPath("/images/"); try { JasperPrint print = service.loadReceipt(RECEIPT_NAME, paymentId, realPath); pdfFile = JasperExportManager.exportReportToPdf(print); OutputStream outStream = res.getOutputStream(); res.setContentType("application/pdf"); res.addHeader("Content-disposition", "inline; filename=Receipt.pdf"); outStream.write(pdfFile); outStream.flush(); outStream.close(); }在部署项目后获取任何目录的真实路径。我发现每次在jboss中部署代码时它都会不断变化。

生成pdf的代码：

public JasperPrint loadReceipt(String reportName, String paymentId, String realPath) {
        HashMap<String, Object> params = new HashMap<String, Object>();
        JasperReport report = null;
        JasperPrint print = null;

        try {
            if (jrReportMap == null) {
                jrReportMap = new HashMap<String, JasperReport>();
            }           

            if (jrReportMap.get(reportName) == null) {
                report = JasperCompileManager.compileReport(reportManager.load(reportName));
                jrReportMap.put(reportName, report);
                log.info(Logger.EVENT_SUCCESS, "--- Report Compilation done --- " + reportName);
            } else {
                report = jrReportMap.get(reportName);
                log.info(Logger.EVENT_SUCCESS, "--- Report already Compiled --- " + reportName);
            }

            params.put("paymentId", paymentId);
            params.put("realPath", realPath);

            try {
                Connection conn = reportDataSource.getConnection();
                print = JasperFillManager.fillReport(report, params, conn);
                conn.close();
            } catch (SQLException e) {
                System.err.println("--- SQL ERR - to get connection -----");
                log.error(Logger.EVENT_FAILURE, "--- Report already Compiled --- " + reportName);
                e.printStackTrace();
            }
        } catch (JRException e1) {
            log.error(Logger.EVENT_FAILURE, "Oops... Something wrong while rendering the report !!!");
            e1.printStackTrace();
        }
        return print;
    }

填写报告的代码：

<frame>
    <reportElement x="0" y="0" width="70" height="67" uuid="0af2e978-7c0c-4805-afb4-4069d1297a12"/>
    <image onErrorType="Blank" evaluationTime="Report">
        <reportElement mode="Opaque" x="0" y="0" width="70" height="67" uuid="c572c836-8d67-480a-b1b1-d603940e6c74"/>
        <imageExpression><![CDATA[$P{realPath}+"/geLogo.jpg"]]></imageExpression>
    </image>
</frame>

最后是jrxml片段：

1 | 1.12 | 22.22 | 123 | 1234.44 | .55

JasperReport在转换为pdf时不显示图像

2 个答案: