Jasper reports Jaspersoft自定义函数未显示在表达式编辑器中

我搜索过谷歌和Stackoverflow，但我就是找不到我问题的答案

我目前使用的是Jaspersoft Studio 5.6.2 final，我试图在我的表达式编辑器中显示一个自定义函数，但无论我尝试什么，我都无法获得要显示的类别和函数

我开始学习上的教程。使用Functions Librry向导（使用File>New>Other>Jaspersoft Studio>Functions Library）生成所有必需的arry文件并创建函数本身很容易

在本教程中，*.properties文件的配置方式不是很清楚，所以我也看了一下，在对属性文件进行了调整之后，自定义函数和类别仍然没有显示出来

我已经尝试直接在Jaspersoft内部测试我的代码，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。什么都不管用

下面是我的文件的内容

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 {
}

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

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\u extension.properties

package net.sf.jasperreports.functions.custom;

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

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

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，我也尝试将该函数添加到现有的TextCategory类中，但这也没有效果

---

有人知道问题出在哪里吗？这已经花了我几天没有任何成功，所以任何帮助将是伟大的

这似乎是最新版本的社区版修复的一个旧错误：