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我搜索了谷歌和 Stackoverflow，但我找不到我的问题的答案。

我目前正在使用 Jaspersoft Studio 5.6.2 final，我正在尝试让自定义函数显示在我的表达式编辑器中，但是无论我尝试什么，我都无法显示类别和函数。

我开始关注https://community.jaspersoft.com/wiki/jaspersoft-studio-expression-editor-how-extend-it-and-contribute-your-own-functions-part-2-0上的教程。使用 Functions Librry 向导（使用 File > New > Other > Jaspersoft Studio > Functions Library）生成所有必需的文件并创建函数本身很容易。

*.properties 文件的配置方式在教程中不是很清楚，所以在制作之后我还查看了http://jasperreports.sourceforge.net/sample.reference/functions/index.html#functions调整属性文件自定义功能和类别仍未显示

我尝试直接在 Jaspersoft 中测试我的代码，将其导出到 jar 文件，在另一个 Eclipse 中创建 jar 文件并重新启动 Jaspersoft Studio。没有任何效果。

以下是我的文件的内容。

类别类

package net.sf.jasperreports.functions.custom;

import net.sf.jasperreports.functions.annotations.FunctionCategory;

// I've also tried @FunctionCategory("Able")
@FunctionCategory()
public final class Able {
}

包含函数的类

package net.sf.jasperreports.functions.custom;

import net.sf.jasperreports.functions.annotations.Function;
import net.sf.jasperreports.functions.annotations.FunctionCategories;
import net.sf.jasperreports.functions.annotations.FunctionParameter;
import net.sf.jasperreports.functions.annotations.FunctionParameters;
import net.sf.jasperreports.functions.standard.TextCategory;

@FunctionCategories({ Able.class, TextCategory.class })
public final class AbleFunctions 
{
    /**
     * Returns a barcode the custom font IDAutomationSHI25M will understand based on the page number
     * and whether or not the current pagenumber is the lastpage 
     * @param pagenumber
     * @param lastpage
     * @return
     */
    @Function("CREATE_BARCODE")
    @FunctionParameters({
        @FunctionParameter("pagenumber"), 
        @FunctionParameter("lastpage")})
    public static String CREATE_BARCODE(Integer pagenumber, boolean lastpage)
    {
        String[] barcodeArray = {"!","\"", "#", "$", "%", "&", "(", ")", "*", "+", ",", "-", ".","/", 
                "0", "1", "2", "3", "4", "5", "6", "7", "8","9", ":", ";", "<", "=", ">", "?", "@", 
                "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q",
                "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "[", "\\", "]", "^","_", "`","a", "b", 
                "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", 
                "t", "u", "v", "w", "x", "y", "z", "{", "|", "}", "~", "┼", "ã", "Ã", "╚", "╔", "╩"};

        String onePage = barcodeArray[1] + barcodeArray[1];
        String middlePagePrefix = barcodeArray[0];
        String lastPagePrefix = barcodeArray[10];

        // There are a couple of specific conditions that will generate a specific outcome.
        // Checking these conditions first
        if (pagenumber == 1 && lastpage) {
            return onePage;
        } else if (pagenumber > 1 && lastpage) {
            return lastPagePrefix + barcodeArray[pagenumber];
        } else {
            return middlePagePrefix + barcodeArray[pagenumber];
        }
    }
}

jasperreports_messages.properties 文件

net.sf.jasperreports.functions.custom.Able.CREATE_BARCODE.description            = Provide the current pagenumber and a boolean property telling if this is the lastpage and this method will return a string that can be turned in a barcode
net.sf.jasperreports.functions.custom.Able.CREATE_BARCODE.lastpage.description   = A boolean value telling if the current page number belongs to the lastpage or not
net.sf.jasperreports.functions.custom.Able.CREATE_BARCODE.lastpage.name          = lastpage
net.sf.jasperreports.functions.custom.Able.CREATE_BARCODE.name                   = CREATE_BARCODE
net.sf.jasperreports.functions.custom.Able.CREATE_BARCODE.pagenumber.description = The current page number
net.sf.jasperreports.functions.custom.Able.CREATE_BARCODE.pagenumber.name        = pagenumber
net.sf.jasperreports.functions.custom.Able.description                           = Custom Able functions for Jasperreports
net.sf.jasperreports.functions.custom.Able.name                                  = Able

jasperreports_extension.properties

net.sf.jasperreports.extension.registry.factory.functions=net.sf.jasperreports.functions.FunctionsRegistryFactory
net.sf.jasperreports.extension.functions.ablefunctions=eu.able.functions.AbleFunctions

正如您在 AbleFunctions 类中看到的那样，我还尝试将该函数添加到现有的 TextCategory 类中，但这也没有任何效果。

有人知道问题可能是什么吗？这已经花了我好几天没有任何成功，所以任何帮助都会很棒！

4

1 回答 1

-1

这似乎是最新版本的社区版修复的旧错误：https ://community.jaspersoft.com/questions/848371/custom-functions

于 2015-03-18T14:22:56.663 回答