test | no main manifest attribute, in hello.jar

问题: test | no main manifest attribute, in hello.jar是什么意思?如何解决这个问题?

回答: 这个错误信息表示在hello.jar中没有指定主清单属性(main manifest attribute)，导致无法找到可执行的主类。通常在使用java -jar命令运行jar包时会出现这个问题。为了解决这个问题，你需要在打包成jar包时指定主类。在MANIFEST.MF文件中添加Main-Class项，指定你的项目的启动类的包路径。这样在运行java -jar命令时就能找到对应的主类了。\[1\]另外，如果你使用的是Maven进行构建，你还需要在pom.xml文件中引入spring-boot-maven-plugin插件，以确保正确生成可执行的jar包。\[2\]\[3\]
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