blocks|key|1085789|text|您可以使用特定版本的Java显式地启动Jenkins，方法是使用Jenkins文件运行该版本。您需要要运行的JDK版本的java.exe，然后可以在命令中分配它。因此，假设您希望在JDK+11中运行Jenkins，并且您的java.exe位于Tools\java11\bin\中，您可以这样说：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1085790|Tools\java11\bin\java.exe+-jar+jenkins.war|code-block|syntax|javascript|1085791|让Jenkins与Java+11一起运行，您可以将它添加到批处理文件中，以避免重复。|1085792|entityMap^0|1O|8|3D|H|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

You can explicitly start Jenkins with a specified version of Java by running the Jenkins war file with that version. You will need the <code>java.exe</code> of the JDK version you want to run in, after which you can assign it in your command. So assuming that you want to run Jenkins in JDK 11 and your java.exe is located in <code>Tools\java11\bin\</code>, you could say:
<pre><code>Tools\java11\bin\java.exe -jar jenkins.war
</code></pre>
And have Jenkins run with Java 11. You could add this to batch file to avoid repeating yourself.

blocks|key|1085822|text|对于Windows，Java版本在C:\Program+(x86)\Jenkins\jre中。我备份了这个文件夹，复制到已经安装的新Java文件夹(C:\Program+\Java\JDK-11.0.15)上，现在一切都正常了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1085823|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|$]]

For Windows, the Java version is in C:\Program Files (x86)\Jenkins\jre. I made a backup of this folder, copied over the new Java folder that had been installed (C:\Program Files\Java\jdk-11.0.15), and everything is working now.

blocks|key|1951022|text|我刚决定这么做。我让Jenkins通过编辑C:\Jenkins文件夹中的文件jenkins.xml+(第40行)在Microsoft构建的Java11上运行，在这里您可以找到jenkins.exe+--在我的示例中，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1951023|<executable>C:\jdk-11.0.15%2B10\bin\java</executable>|code-block|syntax|javascript|1951024|詹金斯就是这样找出java.exe在哪里的。您也需要更新代理机器，它们使用的Java版本是在他们自己的jenkins.xml文件中以类似的方式指定的。|1951025|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I just decided to do this. I have Jenkins running on the Microsoft build of Java 11 by editing the file jenkins.xml (line 40) in the C:\Jenkins folder, where you find jenkins.exe - in my case it looks like this:
<pre><code>&lt;executable&gt;C:\jdk-11.0.15+10\bin\java&lt;/executable&gt;
</code></pre>
That's how Jenkins figures out where java.exe is. You'll want to update your agent machines too, the version of Java they use is specified in a similar way in their own jenkins.xml file.

I am running Jenkins on a Windows 2021 R2 server. Jenkins is telling me &quot;You are running Jenkins on Java 1.8, support for which will end on or after June 21, 2022&quot; and showing: java.runtime.version 1.8.0_144-b01
I have tried everything I can find to update the Java version on the server:
<ul>
<li>Downloaded and Installed from <a href="https://www.java.com/en/download/" rel="nofollow noreferrer">Java</a></li>
<li>Downloaded and Installed Java 11 from <a href="https://www.openlogic.com/openjdk-downloads" rel="nofollow noreferrer">OpenJDK</a></li>
<li>Downloaded and Installed Java SDK 11 from <a href="https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html" rel="nofollow noreferrer">Oracle</a></li>
</ul>
When I run java-version on the server, I get:
<blockquote>
openjdk 11.0.15 2022-04-19 OpenJDK Runtime Environment
OpenLogic-OpenJDK (build 11.0.15+10-adhoc..jdk11u) OpenJDK 64-Bit
Server VM OpenLogic-OpenJDK (build 11.0.15+10-adhoc..jdk11u, mixed
mode)
</blockquote>
The java.library.path for Jenkins is:
<blockquote>
C:\Program Files
(x86)\Jenkins\jre\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program
Files\OpenJDK\jdk-11.0.15.10-hotspot\bin;C:\Program Files\Common
Files\Oracle\Java\javapath;C:\Program Files (x86)\Common
Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Program
Files\dotnet;C:\Program Files\Git\cmd;C:\Program
Files\nodejs;C:\Users\jenkinsa.dotnet\tools;C:\Users\jenkinsa.dotnet\tools;.
</blockquote>
I am not a Java expert, to say the least. <a href="https://www.jenkins.io/doc/administration/requirements/upgrade-java-guidelines/" rel="nofollow noreferrer">Jenkins' documentation</a> says to:
<blockquote>
Upgrade the JVM on which Jenkins is running
Use a package manager to install the new JVM.
Make sure the default JVM is the newly installed version. If it is
not, run systemctl edit jenkins and set either the JAVA_HOME
environment variable or the JENKINS_JAVA_CMD environment variable.
</blockquote>
However, I can't figure out how to determine the &quot;default JVM&quot;.
JAVA_HOME is: C:\Program Files\OpenJDK\jdk-11.0.15.10-hotspot 
JRE_HOME is: C:\Program Files\Java\jre1.8.0_181
I have no JENKINS_JAVA_CMD environment variable, and &quot;systemctl&quot; does not do anything.
No matter what I do, it keeps saying that it is running 1.8 on Jenkins. What am I missing or doing wrong?

How do I update Java version for Jenkins on a Windows server?

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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我正在Windows2021 R2服务器上运行Jenkins。Jenkins告诉我“您正在Java1.8上运行Jenkins，对它的支持将在2022年6月21日或之后结束”，并显示: java.runtime.version 1.8.0_144-b01我已经尝试了所有我能找到的更新服务器上Java版本的方法：从下载并安...

问如何在Windows服务器上更新Jenkins的Java版本？
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