如何在 Java 中使用 org.apache.commons.lang 命名空间？
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How to use org.apache.commons.lang namespace in Java?
提问by devoured elysium
I tried in Eclipseto use org.apache.commons.lang.NotImplementedException, though it seems from what I can see both from IntelliSenseand the Package Explorer, that that namespace does not exist.
我尝试在Eclipse中使用org.apache.commons.lang.NotImplementedException，尽管从IntelliSense和Package Explorer 中都可以看到，该命名空间不存在。
So I guess I must load some other package(do you call them libraries in java?) than those it loaded by default.
所以我想我必须加载一些其他包（你在java中称它们为库吗？）而不是默认加载的包。
This is my current setup: (link dead)
这是我当前的设置：（链接已死）
采纳答案by Padmarag
You need to add Apache commons jar file to the project. You can select the jar you want from here - http://commons.apache.org/downloads/index.html
for lang you need this - commons-lang-2.5.jar
您需要将 Apache commons jar 文件添加到项目中。你可以从这里选择你想要的 jar - http://commons.apache.org/downloads/index.html
for lang 你需要这个 - commons-lang-2.5.jar
回答by marklai
Download the commons lang libraryand add it to your eclipse project library.
下载commons lang 库并将其添加到您的 eclipse 项目库中。
EDIT (2016/02) : it seems that nowadays the .jar files are not provided as is. You have to get the "binary" archive (e.g. "commons-lang3-3.4-bin.zip") from the same download page and extract it. The required jar files are inside the extracted folder.
编辑（2016/02）：现在似乎没有按原样提供 .jar 文件。您必须从同一下载页面获取“二进制”存档（例如“commons-lang3-3.4-bin.zip”）并将其解压缩。所需的 jar 文件位于提取的文件夹中。
To add the jar to your eclipse project library:
要将 jar 添加到您的 eclipse 项目库：
- open project properties
- choose Java Build Path
- tab to Libraries
- add jars (if the jar is inside your project folder)
- add external jar (if the jar is outside your project folder)
- 打开项目属性
- 选择 Java 构建路径
- 选项卡到库
- 添加罐子（如果罐子在你的项目文件夹中）
- 添加外部 jar（如果 jar 在您的项目文件夹之外）
