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eclipse无法从所需项目中导出软件包

[英]eclipse cannot export packages from a required project

原文 2012-02-09 05:38:29 8 2 java/ eclipse/ eclipse-plugin/ classpath

I have the following projects setup in Eclipse Indigo SR1: 我在Eclipse Indigo SR1中设置了以下项目：

Normal Java project (A) which includes package (P) 包含程序包（P）的普通Java项目（A）
Plug-in project (B) which has a copy of the JAR that is exported from A and it then exports package P 插件项目（B），具有从A导出的JAR副本，然后导出包P
Multiple other Plug-in projects (C...Z) which imports package P 导入软件包P的多个其他插件项目（C ... Z）

What I want to do is get rid of the manual export and copy of the JAR from project A into project B. I do not want to convert this project to a plug-in project because the same project is used in a legacy application that does not use OSGi. 我想要做的是摆脱手动将JAR从项目A导出和复制到项目B的过程。我不想将此项目转换为插件项目，因为在具有以下功能的旧版应用程序中使用了相同的项目：不使用OSGi。

This is particularly annoying since when I update the JAR eclipse does not pickup the modified class files and all my breakpoints in there go crazy (a separate issue). 这特别令人讨厌，因为当我更新JAR eclipse时不会拾取修改后的类文件，并且我在那里的所有断点都发疯了（单独的问题）。

I thought I would be able to edit the project properties for B so that A was a "Required project" (Proeprties -> Java Build Path -> Projects), and since that essentially includes the source (at least I guess that is what the entry in .classpath is doing ) I figured I could then export package P from project B. However when I do this, eclipse just complains that plug-in project B does not contain package P. 我以为我可以编辑B的项目属性，以便A是“必需的项目”（Proeprties-> Java Build Path-> Projects），并且由于它实质上包括源代码（至少我猜这就是源代码） .classpath中的条目正在执行）我想可以从项目B中导出程序包P。但是，当我这样做时，eclipse只是抱怨插件项目B中不包含程序包P。

I figured I could just link the source folders from A into B but that's not really what I want to do. 我想我可以将源文件夹从A链接到B，但这并不是我真正想做的。

If a referenced project A is on the classpath then surely the plug-in project A should be able to export those packages, or am I wrong in this assumption? 如果被引用的项目A在类路径上，那么插件项目A当然应该能够导出那些软件包，或者在这种假设下我错了吗？

What is the best way to achieve what I want? 实现我想要的最好的方法是什么？

Cheers, Jason. 干杯，杰森。

2 个解决方案

you should consider using maven as your build tool. 您应该考虑使用maven作为构建工具。 the tool was built to automate exactly things you've described. 该工具旨在完全自动化您所描述的内容。 Maven 马文

You should convert your java project into a plugin project (an OSGi bundle) in this case. 在这种情况下，您应该将Java项目转换为插件项目（OSGi捆绑软件）。 You can still use it both as a regular jar and as a plugin. 您仍然可以将其用作常规jar和插件。 When you convert it, make sure it creates the MANIFEST.MF. 转换时，请确保它创建了MANIFEST.MF。 Just don't create an activator as that would require a dependency on org.eclipse.osgi , and don't add any other require-bundle dependencies. 只是不要创建激活器，因为那样会需要对org.eclipse.osgi的依赖，并且不要添加任何其他require-bundle依赖。

An OSGi bundle is really just a jar (which is fine) with an OSGi MANIFEST.MF that provides information like what packages are exported, any dependencies, etc. OSGi捆绑包实际上只是一个带有OSGi MANIFEST.MF的jar（很好），它提供诸如导出哪些软件包，任何依赖项等信息。