java - 从 ProcessBuilder 执行 jar 给出 ClassNotFoundException

Question

当我尝试从命令行执行 jar 时，它工作正常。我正在尝试在另一个 java 程序中执行相同的 jar，如下所示:

ProcessBuilder pb = new ProcessBuilder("java", "-Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools.jar");
pb.start()

但是，这给了我一个 ClassNotFoundException

ERR>Exception in thread "main" java.lang.NoClassDefFoundError:  -Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools/jar"
ERR>Caused by: java.lang.ClassNotFoundException:  -Xmx1024m -Xms1024m -DTOOLS_DIR=".home.IM.work.dist" -Daoi=whole -jar ".home.IM.work.dist.idt_tools.jar"
ERR>    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
ERR>    at java.security.AccessController.doPrivileged(Native Method)
ERR>    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
ERR>    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
ERR>    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
ERR>    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
ERR>Could not find the main class: -Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist" -Daoi=whole -jar "/home/IM/work/dist/idt_tools.jar".  Program will exit.

为什么它认为这是一个类？您不能在一个长字符串中指定您的参数吗？

Answer 1

对我来说很有意义。

也许您并不打算运行一个名为“-Xmx1024m -Xms1024m -DTOOLS_DIR="/home/IM/work/dist"-Daoi=whole -jar "/home/IM/work/dist/idt_tools. jar”也许你的意思是这些是单独的参数？

尝试

ProcessBuilder pb = new ProcessBuilder("java", "-Xmx1024m", "-Xms1024m",
    "-DTOOLS_DIR=/home/IM/work/dist", "-Daoi=whole", 
    "-jar", "/home/IM/work/dist/idt_tools.jar");