Java非常不寻常的类路径问题

Question

我正在尝试运行一个具有本地库和使用以下代码的应用程序:

ProcessBuilder pb = new ProcessBuilder("javaw",
    "-classpath", 
    binDir + "polyrd.jar;" + binDir + "lwjgl.jar;" + binDir + "lwjgl_util.jar;",
    "-Djava.library.path=" + nativesDir,
    "monster860.polyrd.Polyrd");

我尝试在命令行中做同样的事情，将其更改为-cp，只是使用bindir而不是binDir + "polyrd.jar;" + binDir + "lwjgl.jar;" + binDir + "lwjgl_util.jar;"，并在java和javaw之间切换，但无论我做什么，它给了我:

java.lang.NoClassDefFoundError: monster860/polyrd/Polyrd
Caused by: java.lang.ClassNotFoundException: monster860.polyrd.Polyrd
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source) 

有人能帮忙吗?

我的操作系统是Windows Vista。是的，这些文件确实存在。

我是这样得到binDir和nativesDir的:

public ProcessRunnable(File nativesDir, File binDir) {
        try {
            this.nativesDir = nativesDir.getCanonicalPath() + File.separator;
            this.binDir = binDir.getCanonicalPath() + File.separator;
        } catch (IOException e) {
        // TODO Auto-generated catch block
            e.printStackTrace();
        }
}

编辑:当然，这和这个完全没有关系，但是下载程序只下载了文件的前2kb

Answer 1

自Java 6以来，"作为一种特殊的方便，包含*基名的类路径元素被认为等同于指定目录中扩展名为.jar或.JAR的所有文件的列表"。详细信息请参见java命令行选项。

附录:本例使用前面提到的通配符特性启动JFreeChart。

import java.io.BufferedReader;
import java.io.InputStreamReader;
/** @see https://stackoverflow.com/a/15121864/230513 */
public class PBTest {
    private static final String baseDir = "/opt/jfreechart/";
    public static void main(String[] args) {
        ProcessBuilder pb = new ProcessBuilder("java", "-cp",
            baseDir + "lib/*:" + baseDir + "jfreechart-1.0.14-demo.jar",
            "demo.SuperDemo");
        pb.redirectErrorStream(true);
        try {
            Process p = pb.start();
            String s;
            // read from the process's combined stdout & stderr
            BufferedReader stdout = new BufferedReader(
                new InputStreamReader(p.getInputStream()));
            while ((s = stdout.readLine()) != null) {
                System.out.println(s);
            }
            System.out.println("Exit value: " + p.waitFor());
            p.getInputStream().close();
            p.getOutputStream().close();
            p.getErrorStream().close();
        } catch (Exception ex) {
            ex.printStackTrace(System.err);
        }
    }
}

附录:这是Windows的变化，它需要;作为路径分隔符。

private static final String baseDir = "C:/Users/Public/JFreeChart/";
public static void main(String[] args) {
    ProcessBuilder pb = new ProcessBuilder("java", "-cp",
        baseDir + "lib/*;" + baseDir + "jfreechart-1.0.14-demo.jar",
        "demo.SuperDemo");