Jasper 报告中出现 NullPointerException？

发布于 2024-12-17 17:42:42 字数 1875 浏览 0 评论 0原文

当我使用 jasper 报告（版本 1.2.4）导出报告时，它会抛出 NPE。而且我在网上找不到任何解决该问题的方法。有人可以在这方面帮助我吗？

如果我删除报告中的一列有问题的列并将其导出，则它可以正常导出。无法找到该列的问题所在，因为它包含大量数据。

非常感谢！

将异常发布如下：

java.lang.NullPointerException|

at java.awt.font.TextLayout.getBaselineFromGraphic(Unknown Source)|

at java.awt.font.TextMeasurer.initAll(Unknown Source)|

at java.awt.font.TextMeasurer.<init>(Unknown Source)|

at java.awt.font.LineBreakMeasurer.<init>(Unknown Source)|

at java.awt.font.LineBreakMeasurer.<init>(Unknown Source)|

at net.sf.jasperreports.engine.fill.TextMeasurer.renderParagraph(TextMeasurer.java:259)|

at net.sf.jasperreports.engine.fill.TextMeasurer.measure(TextMeasurer.java:220)|

at net.sf.jasperreports.engine.fill.JRFillTextElement.chopTextElement(JRFillTextElement.java:528)|

at net.sf.jasperreports.engine.fill.JRFillTextField.prepare(JRFillTextField.java:501)|

at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:345)|

at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:311)|

at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:275)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:1291)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:631)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportContent(JRVerticalFiller.java:248)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:132)|

at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:750)|

at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:666)|

at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:89)|

at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:601)

原文

When I export a report using jasper report (version 1.2.4), it throws NPE. And I cant find any solution to the problem online. Can anyone help me in this regard please?

If I remove one problematic column in my report and export it, it exports fine. Couldn't find whats the problem with that column as it contains large data.

Many Thanks in Advance !

Posting the exception below :

java.lang.NullPointerException|

at java.awt.font.TextLayout.getBaselineFromGraphic(Unknown Source)|

at java.awt.font.TextMeasurer.initAll(Unknown Source)|

at java.awt.font.TextMeasurer.<init>(Unknown Source)|

at java.awt.font.LineBreakMeasurer.<init>(Unknown Source)|

at java.awt.font.LineBreakMeasurer.<init>(Unknown Source)|

at net.sf.jasperreports.engine.fill.TextMeasurer.renderParagraph(TextMeasurer.java:259)|

at net.sf.jasperreports.engine.fill.TextMeasurer.measure(TextMeasurer.java:220)|

at net.sf.jasperreports.engine.fill.JRFillTextElement.chopTextElement(JRFillTextElement.java:528)|

at net.sf.jasperreports.engine.fill.JRFillTextField.prepare(JRFillTextField.java:501)|

at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:345)|

at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:311)|

at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:275)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:1291)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:631)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportContent(JRVerticalFiller.java:248)|

at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:132)|

at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:750)|

at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:666)|

at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:89)|

at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:601)

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梦在夏天 2024-12-24 17:42:42

您可以使用纯 JRE 代码得到完全相同的错误，如下所示：

@Test
public void testText()
{
    String text = "\uFFFF\u0300";
    JTextArea textArea = new JTextArea(text);
    JOptionPane.showMessageDialog(null, textArea);
}

因此，我一直假设这是一个 JRE 错误并已将其提交给 Oracle。解决方法大概是剔除导致它的任何字符序列，但我显然不知道你在输入什么。

You can get the exact same error using pure JRE code, like this:

@Test
public void testText()
{
    String text = "\uFFFF\u0300";
    JTextArea textArea = new JTextArea(text);
    JOptionPane.showMessageDialog(null, textArea);
}

Because of this, I have been assuming it's a JRE bug and already submitted it to Oracle. The workaround is presumably to cull whatever character sequence is causing it, but I obviously don't know what you are feeding in.

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