在命令行上运行java而不指定classpath [英] Run java without specifying classpath on the command line

问题描述

我已经在.jar文件清单中指定了java程序的主类和类路径，但偶尔我想要运行与 Main-Class 属性。我是否可以让java启动这个类，同时仍然从清单中提取类路径，这样我就不必在命令行中用 -cp 指定整个东西了？

I've specified the main class and classpath for a java program in the .jar file manifest, but occasionally I want to run a different class from the one specified by the Main-Class attribute. Can I get java to launch this class while still pulling the classpath from the manifest, so that I don't have to specify the whole thing on the command line with -cp?

推荐答案

只需将命令行中的jar文件放入-cp;然后，Java将观察清单中的classpath属性，即使您没有使用-jar：

Just put the jar file on the command line with -cp; Java will then observe the classpath attribute within the manifest, even though you're not using -jar:

java -cp app.jar MyOtherClass

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