blocks|key|385695|text|Java作为一种语言不需要virtualenv的沙箱特性，但是像Jython这样的JVM语言可以使用VirtualEnv来使用不同的环境，而不会发生任何冲突。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|385696|它在this+blog+post中进行了概述|offset|length|385697|引用：|385698|为|385699|安装virtualenv。只需输入"jeasy_install+virtualenv“。完成后，在Jython安装的bin文件夹中应该有一个'virtualenv‘工具。|blockquote|385700|385701|385702|因此，在使用Jython时，可以使用不同的框架和包，而不会与全局包发生任何冲突。|385703|entityMap|0|LINK|mutability|MUTABLE|url|http://tech-nickel.blogspot.com/2009/07/running-pylons-with-jython-for.html^0|0|2|E|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@$D|10|E|11|1|12]]|A|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|15|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Java as a language does not need the sandboxing features of virtualenv but a JVM Language like Jython can have VirtualEnv to use different environments without any conflict.

It is outlined in <a href="http://tech-nickel.blogspot.com/2009/07/running-pylons-with-jython-for.html" rel="nofollow">this blog post</a> 

Quote:

<blockquote>
 Get virtualenv installed for Jython. Just type "jeasy_install
 virtualenv". Once that finishes you should have a 'virtualenv' tool in
 the Jython installation's bin folder.
</blockquote>

So when using Jython different frameworks and packages can be used without any conflict with global packages.

blocks|key|2305786|text|Maven中，您可以显式指定要在java项目中使用的包。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2305787|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Maven, you can explicitly specify which packages you would use in a java project

blocks|key|4205594|text|Maven和gradle等构建工具是最接近pip或easy_install的工具。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4205595|virtualenv的概念是由类路径实现的。因此对于Java来说，并不真正需要virtualenv|4205596|entityMap^0|L|3|P|C|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

Build tools like Ant, Maven, and gradle are the the closest thing to <code>pip</code> or <code>easy_install</code>.

The concept of virtualenv is done by the classpath. So there is no real need of virtualenv for Java

blocks|key|2305834|text|我知道这可能有点晚了，但是Groovy提供了gvm，这是http://gvmtool.net/的Groovy版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2305835|我同意高塔姆·克卢瑟的观点。项目的依赖和包版本管理不同于一个孤立的、自包含的虚拟环境来维护不同的项目。|2305836|我的2美分-W|2305837|entityMap|0|LINK|mutability|MUTABLE|url|http://gvmtool.net/^0|S|J|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

I know this may be a little late , but Groovy/Java has gvm <a href="http://gvmtool.net/" rel="nofollow">http://gvmtool.net/</a> which is the Groovy version of Ruby's renv.

I would respectfully agree with Gautam K, luthur. Dependency and package version management for projects is not the same as an isolated self-contained virtual environment to maintain different project.

My 2 cents
-W

blocks|key|3919855|text|我被这样的断言弄糊涂了："Java没有‘全系统安装’库的概念“。您如何命名$JAVA_HOME/jre/lib和$JAVA_HOME/jre/lib/ext中的jar文件？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3919856|不管Java是否“需要”像virtualenv这样的工具，似乎有一些东西允许您在不同的Java环境之间快速切换(例如，具有某某安全扩展的Java6、Java7等)。这将是非常方便的--即使它实际上只是在幕后操纵PATH、JAVA_HOME和CLASSPATH环境变量。|3919857|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I'm confused by the assertion that "Java doesn't have the concept of a 'system-wide installed' library". What would you call the jar files in $JAVA_HOME/jre/lib and $JAVA_HOME/jre/lib/ext?

Regardless of whether or not Java "needs" a tool like virtualenv, it seems that something that allowed you to quickly switch between different Java environments (e.g. Java 6 with such-and-such security extensions, Java 7, etc.) would be handy - even if all it was actually doing under the covers was manipulating the PATH, JAVA_HOME, and CLASSPATH env variables.

blocks|key|4205727|text|我也一直在寻找一种类似的解决方案，以简化使用不同Maven版本/设置和/或Java的项目之间的上下文切换，而不必每次都修改M2_HOME和JAVA_HOME设置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4205728|为此，我开发了一个解决方案，它可以根据mvn每个项目的设置(存储在.mvn文件夹中)，使用适当的配置来帮助执行命令。|BOLD|4205729|请参阅：https://github.com/AlejandroRivera/maven-env|4205730|请注意，只有在使用Maven构建和/或运行项目时，这才有帮助。|4205731|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/AlejandroRivera/maven-env^0|1P|7|1X|9|0|J|3|X|4|1J|3|0|0|1C|4|18|0|0|0|V|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|16|8|@$9|17|A|18|B|H]]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|K|3|L|5|6|7|1C|8|@$9|1D|A|1E|B|H]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

I have also been looking for a similar solution to simplify switching context between projects that use different Maven versions/settings and/or Java SDKs without having to modify <code>M2_HOME</code> and <code>JAVA_HOME</code> settings every time.

To this end, I developed a solution that helps execute <code>mvn</code> commands with the appropriate configuration based on per-project settings (stored in a <code>.mvn</code> folder). 

See: <a href="https://github.com/AlejandroRivera/maven-env" rel="nofollow">https://github.com/AlejandroRivera/maven-env</a>

Be aware that this only helps if you're using Maven to build and/or run your project.

blocks|key|384465|text|是的(参见http://www.jenv.be/)，就像许多其他语言一样(Ruby，R，Php，等等)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|384466|entityMap|0|LINK|mutability|MUTABLE|url|http://www.jenv.be/^0|5|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Yes(see <a href="http://www.jenv.be/" rel="nofollow noreferrer">http://www.jenv.be/</a>), like many other languages (Ruby, Python, Go, R, Php, etc. etc.).

Is there anything similar to Python <a href="http://www.virtualenv.org/en/latest/index.html#virtualenv" rel="noreferrer">virtualenv</a> for Java or JVM Languages?

Is there anything like VirtualEnv for Java?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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