Jenkins / Maven：无法解析默认的 JAVA_HOME 路径，构建失败
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Jenkins / Maven: Could not resolve default JAVA_HOME path, Build failing
提问by mchlfchr
I've got a problem regarding Java Builds in Jenkins.
我在 Jenkins 中遇到了有关 Java 构建的问题。
The Error I resolve is the following one:
我解决的错误如下：
Unable to locate the Javac Compiler in:
C:\Jenkins\jre\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.
Unable to locate the Javac Compiler in:
C:\Jenkins\jre\..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.
I got JDK1.6and JDK1.7projects, so I need two JDK installations. For my default Java JDK I used the 1.6 for the JAVA_HOMEvariable, which points to C:\Program Files\Java\jdk1.6.0_45. Same for the 1.7 version, but in a separated variable (JAVA_HOME7).
The PATHvariable contains the appended \binto the two JDK versions.
我有JDK1.6和JDK1.7项目，所以我需要两个 JDK 安装。对于我的默认 Java JDK，我使用 1.6 作为JAVA_HOME变量，它指向C:\Program Files\Java\jdk1.6.0_45. 与 1.7 版本相同，但在一个单独的变量 ( JAVA_HOME7) 中。该PATH变量包含附加\bin到两个 JDK 版本。
In Jenkins I also added both versions for JDK and as helper variables.
If I am setting a concrete version for a project (e.g. JDK1.7), then it's building without any issues. Unfortunately I've got a lot of build-projects, so it would be time consuming to set this manually.
在 Jenkins 中，我还为 JDK 和辅助变量添加了两个版本。如果我正在为一个项目（例如JDK1.7）设置一个具体的版本，那么它的构建没有任何问题。不幸的是，我有很多构建项目，因此手动设置它会很耗时。
I don't understand where the call or variable for the path of the error C:\Jenkins\jre\..\lib\tools.jaris set and where I can modify it...
我不明白错误路径的调用或变量在C:\Jenkins\jre\..\lib\tools.jar哪里设置以及我可以在哪里修改它...
Jenkins Version: 1.509.4
詹金斯版本：1.509.4
Any hints or advices how to solve this problem?
任何提示或建议如何解决这个问题？
回答by Sudharsan Srinivasan
I faced the same problem. The below steps solved the problem
我遇到了同样的问题。以下步骤解决了问题
1) Go to Manage Jenkins - Configure system
1) 转到管理 Jenkins - 配置系统
2) Add JAVA_HOME and its path in Global Properties - Environment Variables
2）在全局属性-环境变量中添加JAVA_HOME及其路径
3) Add JDK and path in JDK section
3）在JDK部分添加JDK和路径
