贾斯珀·佩奇(Jasper Page)在新字段/变量上中断 [英] Jasper Page break on New Field/Variable

问题描述

我正在处理一个碧玉报表，并且试图找出一种在可变更改时报表分页的方法.该变量实际上是一个字段，我将字段的值放在一个变量中.

I am working on a jasper report, and I am trying to figure out a way for the report to page break on a variable change. The variable is actually a Field, and I put the value of the field in a variable.

现在，贾斯珀报告(Jasper Reports)网站上有一个示例，说明了如何按这种方式将其破坏

Now, the Jasper Reports website has an example on how to break it by count like this

<groupExpression><![CDATA[new Boolean($V{BreakGroup_COUNT}.intValue()
> 5)]] ></groupExpression>

但是，我不确定以任何方式比较上一个或下一个值并在此之后中断.

However, I am not sure of any way to compare the previous or next value and breaking after that.

推荐答案

您只希望报表在$ F {MyField}更改值时开始一个新页面.

You just want the report to start a new page when $F{MyField} changes value.

在这种情况下，只需使用"Group Expression"创建一个组:$F{MyField}

In this case simply create a group with 'Group Expression': $F{MyField}

为该组打勾开始新页面"选项.不需要变量.

Tick the option 'Start on a new page' for the group. There is no need for a variable.

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