将jasper导出为pdf时，NoClassDefFoundError：com / itextpdf / text / DocumentException [英] NoClassDefFoundError: com/itextpdf/text/DocumentException when exporting jasper to pdf

问题描述

我创建了一个 jasper 报告，现在我需要将该报告导出为 pdf 格式。这是我的代码。

I created a jasper report and now I need to export that report to pdf format. This is my code for that.

        // compiles jrxml
        JasperCompileManager.compileReportToFile(reportName + ".jrxml");
        // fills compiled report with parameters and a connection
        JasperPrint print = JasperFillManager.fillReport(reportName + ".jasper", parameters, connection);

        // to view the report
        //JasperViewer.viewReport(print, false);

        // export repor to pdf
        JasperExportManager.exportReportToPdfFile(print, "fromXml.pdf");

当我使用 JasperViewer 查看报告时，它工作正常。但是当我将报告导出为 pdf 格式时，它会给我以下异常。

When I view the report using JasperViewer, it works fine. But When I exporting the report into pdf format, it gives me the following exception.

Exception in thread "main" java.lang.NoClassDefFoundError: com/itextpdf/text/DocumentException

<但是我已将iText jar放入我的库中。

But I have put the iText jar into my libraries.

但有一点，我之前有另一个版本的 iText jar。它给了我同样的例外。我认为它的版本可能存在一些问题。（我遵循了一个教程，所以我添加了与教程中使用的相同的jar替换我使用过的新jar。）

But one thing, I had another version of iText jar before. It gave me the same exception. I thought that there may be some issues with the version of it.(I followed a tutorial, so I added the same jar as they had used in the tutorial replacing the new jar I had used).

但仍然存在问题。我认为这可能是现在的问题（接受的答案是题）。但我不知道如何解决它。我删除了整个库并使用本教程使用的 iText jar再次添加它。但我没有运气。

but still the problem remains. I thought this may be the issue now(the accepted answer of the question). But I do not know how to fix it. I removed the entire library and added it again with iText jar which had been used by the tutorial. But I had no luck.

请你帮我解决这个问题。
谢谢！

Could you please help me to overcome this issue. Thank you!

推荐答案

您需要将iText-2.1.7.jar文件升级到之前的最新版本jar使用的包是 com.lowagie ...

You need to upgrade your iText-2.1.7.jar file to latest version as earlier the package that was used by jar is com.lowagie...

查看更改列表此处表示已更改包名称。

See the change list here which says it has changed the package name.

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