背景
Jeb2/3需要對應的Java版本才能運行，如果Java版本不對應，則會報以下錯誤Unsupported major.minor version 52.0:
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/pnfsoftware/jeb/rcpclient/Launcher : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
2020-04-13 11:36:36.051 jeb[59178:6259481] jeb:Failed to launch JVM
問題解決
1.Jeb與Java版本對應關係
- Jeb2.2.7
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
- Jeb3.0.0
java version "1.8.0_151"
Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
JDK：下載地址
- JEB啓動腳本修改
Jeb2.2.7 修改jeb_macos.sh，在文件開頭添加
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home
export CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:.
export PATH=$JAVA_HOME/bin:$PATH
同理
Jeb3.0.0 修改jeb_macos.sh，在文件開頭添加
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home
export CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:.
export PATH=$JAVA_HOME/bin:$PATH
其他
如果依舊報錯，建議卸載JDK後，重新安裝JDK，筆者就是通過重新安裝JDK解決問題的，不關係統版本。