JasperReport:是否可以设置PDF的“初始缩放"? [英] JasperReport: Is it possible to set Initial Zoom in PDF?

问题描述

我有一个JasperPrint，它已导出为PDF，并且显示为嵌入到网页中.

I have a JasperPrint that is exported to PDF and it's showing embedded into a web page.

是否可以通过任何方式设置初始缩放?

我知道如何使用POI(通过javascript)做到这一点，但是我找不到在Jasper中添加JavaScript代码的方法...

I know how to do it with POI (by javascript), but I don't find the way to add the JavaScript code in Jasper...

感谢@AlexK的链接，我找到了解决方法:)

Thanks to the link of @ AlexK, I found the solution :)

public ByteArrayOutputStream fillPDF(JasperPrint jasperPrint) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    try{
        JRPdfExporter exporter = new  JRPdfExporter();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRPdfExporterParameter.PDF_JAVASCRIPT, "this.zoom = 70;");
        exporter.setParameter(JRPdfExporterParameter.OUTPUT_STREAM,baos); 
        exporter.exportReport(); 
    }catch (Throwable e){
    }
    return baos;
}

推荐答案

@ganzux的回答.可以在JavaScript的帮助下设置缩放比例.

The answer by @ganzux. The zoom can be set with help of JavaScript.

表达式将是:this.zoom = 70;

代码段是:

public ByteArrayOutputStream fillPDF(JasperPrint jasperPrint) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    try{
        JRPdfExporter exporter = new  JRPdfExporter();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRPdfExporterParameter.PDF_JAVASCRIPT, "this.zoom = 70;");
        exporter.setParameter(JRPdfExporterParameter.OUTPUT_STREAM,baos); 
        exporter.exportReport(); 
    }catch (Throwable e){
    }
    return baos;
}

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