jasperreport生成pdf_jasperreport 导出excel_jasperreport json(27)

the remaining space at the bottom of the page or column, you have to set to "true" either the

isStartNewPage or isStartNewColumn attribute.

Those two attributes are the only settings in the entire library that let you voluntary

introduce page breaks. In all other situation, the reporting engine introduces page breaks

automatically, if it needs to.

However, in some report designs, you probably want to introduce page breaks on purpose,

because some particular report section of yours is larger than one page. You can achieve that

by introducing special dummy groups as you can see in the Tips & Tricks section of the

freely available documentation, published on the JasperReports site.

However, if you don't want to consistently introduce page or column breaks for a particular group, but

you rather do that only if the remaining space at the bottom of the page or column is too small, you

should consider using the minHeightToStartNewPage attribute.

This attribute specifies the minimum amount of remaining vertical space required so that the group

does not start a new page of its own. It is measured in pixels.

Resetting Page Number

If required, report groups have the power to reset the built-in report variable which contains the current

page number (variable PAGE_NUMBER). This could be achieved by setting the isResetPageNumber

attribute to "true".

The JasperReports Ultimate Guide

Page 42

Group Header

This section is the one that marks the start of a new group in the resulting document, and it is inserted

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