Java 如何在 Windows 中运行或安装 *.jar 文件？
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how to run or install a *.jar file in windows?
提问by brainless
I have downloaded jbpm-installer-3.2.7.jarbut I don't know how to install or run the file.
我已经下载，jbpm-installer-3.2.7.jar但我不知道如何安装或运行该文件。
If I double click on it, it opens in winrar. I tried installing through command prompt, but I got the following errors:
如果我双击它，它会以winrar. 我尝试通过命令提示符安装，但出现以下错误：
C:\Documents and Settings\ccuser\Desktop\manoj>java -jar jbpm-installer-3.2.7.jar
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/izforge/izpack/installer/Installer (Unsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access0(Unknown Source)
at java.net.URLClassLoader.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
采纳答案by user85421
The UnsupportedClassVersionErrormeans that you are probably using (installed) an older version of Java as used to create the JAR.
Go to java.sun.com page, download and install a newer JRE (Java Runtime Environment).
if you want/need to develop with Java, you will need the JDK which includes the JRE.
这UnsupportedClassVersionError意味着您可能正在使用（安装）旧版本的 Java 来创建 JAR。
转到java.sun.com 页面，下载并安装较新的 JRE（Java 运行时环境）。
如果您想/需要使用 Java 进行开发，您将需要包含 JRE 的 JDK。
回答by Tom
回答by Dean
回答by mocybin
Open up a command prompt and type java -jar jbpm-installer-3.2.7.jar
打开命令提示符并键入 java -jar jbpm-installer-3.2.7.jar
回答by Serplat
If double-clicking on it brings up WinRAR, you need to change the program you are running it with. You can right-click on it and click "Open with". Java should be listed in there.
如果双击它会出现 WinRAR，则您需要更改运行它的程序。您可以右键单击它，然后单击“打开方式”。Java 应该列在那里。
However, you must first upgrade your Java version to be compatible with that JAR.
但是，您必须首先升级 Java 版本以与该 JAR 兼容。
