许多生成PDF的人都需要绑定它们。良好的绑定要求每个其他页面在其左侧和右侧支持备用边距大小。我知道JasperReports在其3.x系列中并不支持这一点。这是否支持4.x系列?
答案 0 :(得分:4)
您可以通过继承JRPdfExporter,覆盖方法exportReportToStream来完成Dave所提到的marginMirroring。不幸的是,您需要将此方法的源复制到您的覆盖中。在覆盖中,您将修改页面循环,如下所示:
for(int pageIndex = startPageIndex; pageIndex <= endPageIndex; pageIndex++)
{
int margin = marginLeft;
if (pageIndex % 2 == 1) margin = marginRight;
parameters.put(JRExporterParameter.OFFSET_X, margin);
setOffset();
...
我的子类的构造函数包含边距:
public MirroringJRPdfExporter(int left, int right, int top, int bottom) {
this.marginLeft = left;
this.marginRight = right;
this.marginTop = top;
this.marginBottom = bottom;
}
我也接受了顶部和底部,以防我需要镜像页面翻转。
另一个不幸的注意事项是,exportReportToStream使用一个帮助程序JRPdfExporterTagHelper,并调用受保护的2个方法init和setPdfWriter,因此除非您对辅助程序进行子类化并将这些方法公开给您的子类,否则您的子类将无法编译。我这样做了:
public class JRPdfExporterTagHelper extends
net.sf.jasperreports.engine.export.JRPdfExporterTagHelper {
protected JRPdfExporterTagHelper(JRPdfExporter exporter) {
super(exporter);
}
public void setPdfWriter2(PdfWriter pdfWriter) {
setPdfWriter(pdfWriter);
}
public void init2(PdfContentByte pdfContentByte) {
init(pdfContentByte);
}
}
然后,我称之为:
MirroringJRPdfExporter exporter = new MirroringJRPdfExporter(72, 36, 44, 31);
exporter.setParameter(JRExporterParameter.JASPER_PRINT, print);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, output);
exporter.exportReport();
答案 1 :(得分:1)
在JasperReports 6.x中,您可以通过设置
在报告模板(jrxml)中分别指定偶数页和奇数页的边距<property name="net.sf.jasperreports.export.pdf.odd.page.offset.x" value="10"/>
<property name="net.sf.jasperreports.export.pdf.even.page.offset.x" value="-10"/>
可以从JasperReports示例文件demo/samples/query/reports/QueryReport.jrxml
中找到一个示例。我在an issue中找到了这个解决方案。
在Java中将报告导出为pdf时,可以使用JRPdfExporter
类设置相同的内容:
JRPdfExporter exporter = new JRPdfExporter();
SimplePdfReportConfiguration configuration = new SimplePdfReportConfiguration();
configuration.setOddPageOffsetX(10);
configuration.setEvenPageOffsetX(-10);
exporter.setConfiguration(configuration);
答案 2 :(得分:0)
除了@bigspotteddog的答案之外,为了使用jasper 5.6,我做了:
@Override
protected PdfReportConfiguration getCurrentItemConfiguration() {
SimplePdfReportConfiguration config = new SimplePdfReportConfiguration();
PdfReportConfiguration currentItemConfiguration = super.getCurrentItemConfiguration();
config.setCollapseMissingBookmarkLevels(currentItemConfiguration.isCollapseMissingBookmarkLevels());
config.setForceLineBreakPolicy(currentItemConfiguration.isForceLineBreakPolicy());
config.setForceSvgShapes(currentItemConfiguration.isForceSvgShapes());
config.setIgnoreHyperlink(currentItemConfiguration.isIgnoreHyperlink());
config.setOverrideHints(currentItemConfiguration.isOverrideHints());
config.setSizePageToContent(currentItemConfiguration.isSizePageToContent());
config.setEndPageIndex(currentItemConfiguration.getEndPageIndex());
config.setExporterFilter(currentItemConfiguration.getExporterFilter());
config.setHyperlinkProducerFactory(currentItemConfiguration.getHyperlinkProducerFactory());
config.setPageIndex(currentItemConfiguration.getPageIndex());
config.setProgressMonitor(currentItemConfiguration.getProgressMonitor());
config.setStartPageIndex(currentItemConfiguration.getStartPageIndex());
config.setOffsetX(margin);
return config;
}
和:
margin = marginLeft;
if (pageIndex % 2 == 1) margin = marginRight;
在循环中。