Mac OSX 10.9.2上的Maven 3.2.1錯誤地使用了JRE 7，而不是JDK 7

Question

我已嘗試按照在Mac OS X上安裝Java JDK 7之后的說明進行操作-mvn -version仍顯示Java版本1.6.0_31，但它們不能解決我的問題。 :-(

當我跑步時：

mvn clean install

我收到以下問題：

[INFO] Scanning for projects...
[INFO] 
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building JBehave JUnit Runner 1.2.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ jbehave-junit-runner ---
[INFO] Deleting /Users/skurlow/IdeaProjects/mygithubforks/jbehave-junit-runner/target
[INFO] 
[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-maven) @ jbehave-junit-runner ---
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ jbehave-junit-runner ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/skurlow/IdeaProjects/mygithubforks/jbehave-junit-runner/src/main/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ jbehave-junit-runner ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 5 source files to /Users/skurlow/IdeaProjects/mygithubforks/jbehave-junit-runner/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.164 s
[INFO] Finished at: 2014-04-18T07:25:53+10:00
[INFO] Final Memory: 11M/126M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project jbehave-junit-runner: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

我安裝了Oracle的JDK7：

echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home

我將其添加到pom.xml中是因為maven是如何決定使用1.5而不是1.7的源和目標的：

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>

當我跑步時：

mvn clean install -X

我看到它告訴我正在使用JRE，而不是JDK。 但是我無法終生改變Maven以使用JDK而不是JRE。 :-(

Apache Maven 3.2.1 (ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9; 2014-02-15T04:37:52+10:00)
Maven home: /Users/skurlow/tools/apache-maven-3.2.1
Java version: 1.7.0_55, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.9.2", arch: "x86_64", family: "mac"
[INFO] Error stacktraces are turned on.

運行的輸出：

mvn --version

是：

Apache Maven 3.2.1 (ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9; 2014-02-15T04:37:52+10:00)
Maven home: /Users/skurlow/tools/apache-maven-3.2.1
Java version: 1.7.0_55, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.9.2", arch: "x86_64", family: "mac"

運行的輸出：

javac -version

是：

javac 1.7.0_55

Answer 1

我在Windows環境中遇到了相同的錯誤。 解決方案是將JAVA_HOME環境變量設置為JDK路徑而不是JRE路徑。 這是：

JAVA_HOME = C：\\ Program Files \\ Java \\ jdk1.7.0_55

PATH =％JAVA_HOME％\\ bin

確保遵循OSX的maven安裝說明。 對您來說，這可能是：

確保將JAVA_HOME設置為JDK的位置，例如export JAVA_HOME = / usr / java / jdk1.7.0_51，並且$ JAVA_HOME / bin位於PATH環境變量中。

Answer 2

解決方法是從我的主目錄中的〜/ Library / Java / Extensions中刪除tools.jar

由於一個未知的原因，我在那里有一個JDK5版本。

如果您在/ Library / Java / Extensions的根文件夾中有此文件，也可以檢查並刪除它