如何从Coldfusion 2016内部加载jsoup Java库? [英] How do I load jsoup Java library from inside Coldfusion 2016?

问题描述

TLDR:CreateObject函数引发异常(java.lang.ClassNotFoundException)，因为它看不到Java类/JAR文件.

TLDR: CreateObject function throws an exception (java.lang.ClassNotFoundException) because it cannot see the java class/JAR file.

任何想法我在做什么错?谢谢

Any ideas what am I doing wrong? Thanks

Application.cfc的内容

<cfcomponent output="true">

    <cfset path = "#Mid(CGI.CF_TEMPLATE_PATH, 1, FindNoCase("index.cfm", CGI.CF_TEMPLATE_PATH)-2)#/java/lib" />
    <cfoutput>path: #path#</cfoutput>

    <cftry>
        <cfset This.javaSettings = {LoadPaths = ["#path#/", "#path#/java/lib/jsoup-1.12.1.jar", "./java/lib/", "./java/lib/jsoup-1.12.1.jar"], loadColdFusionClassPath = true, reloadOnChange = true}>

        <cfset jsoup = CreateObject("java", "org.jsoup.Jsoup") />

        <cfcatch type="any">
            <cfdump var="#cfcatch#" />
        </cfcatch>
    </cftry>

    <cfabort>
</cfcomponent>

JAR文件位置

/Volumes/mydrive/work/myapp/java/lib/jsoup-1.12.1.jar

Application.cfc内cfoutput的输出

path: /Volumes/mydrive/work/myapp/java/lib

推荐答案

@mrjayviper，我不确定为什么您在loadPaths数组中多次添加了 jsoup-1.12.1.jar ?

@mrjayviper, I'm not sure why you have added the jsoup-1.12.1.jar in more times in loadPaths array ?

和您的PATH = > /Volumes/mydrive/work/myapp/java/lib一样，但是您已经像#path#/java/lib/jsoup-1.12.1.jar.这样在loadPaths数组中传递了值，因此应该将其视为/Volumes/mydrive/work/myapp/java/lib/java/lib/jsoup-1.12.1.jar，所以这是完全错误的.这是造成您问题的原因.

As well as your PATH = > /Volumes/mydrive/work/myapp/java/lib, But you have passed the value in loadPaths array like #path#/java/lib/jsoup-1.12.1.jar. Then it's should consider it as /Volumes/mydrive/work/myapp/java/lib/java/lib/jsoup-1.12.1.jar So it's totally wrong. That's an causes of your problem.

在这里，我希望通过示例应用程序为您提供更好的解决方案，

Here I wish to give some better solution for you with my sample application,

我的简单应用程序文件结构如下:

My simple application files structure look like this,

• Application.cfc:只是具有以下内容的普通Application.cfc文件 this.javaSettings加载JSOUP jar文件
• index.cfm:具有使用jSoup&执行解析操作
• jsoup-1.8.3.jar:下载的JSOUP jar文件

• Application.cfc : Just normal Application.cfc file which having this.javaSettings to load the JSOUP jar file
• index.cfm : Having code to fetching web page content using jSoup & executes the parsing operation
• jsoup-1.8.3.jar : The downloaded JSOUP jar file

然后，您可以在 application.cfc 文件中设置JavaSetting，如下所示:

Then you can set the javaSetting in application.cfc file like below

component {
    this.name = "jSoupParser";
    //Loads the JAR File
    this.javaSettings = { loadPaths = [ "#expandPath('./jsoup-1.8.3.jar')#" ], 
                            reloadOnChange = false };
}

您可以使用expandPath()并指出当前的应用程序目录. 然后，您可以在cfm文件中创建一个对象，如下所示 Index.cfm :

You could use the expandPath() and can point out your current application directory. Then you can create an object in your cfm file like below Index.cfm :

<cfset getJsoup = createObject("java", "org.jsoup.Jsoup")> 

希望这对您有所帮助.如果您想对此进行更多的解释/说明，请访问下面的链接.我的团队已经为此jSoup提供了示例. https://www.mitrahsoft. com/index.cfm/blog/ColdFusion-Web-scraping-HTML-Parsing-using-JSOUP .

I hope this help you more. If you want more explanation / clarification about this then please visit below link. Already my team gave the sample for this jSoup. https://www.mitrahsoft.com/index.cfm/blog/ColdFusion-Web-scraping-HTML-Parsing-using-JSOUP.

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