java - 使用 Java 在 Mac 上启动 Minecraft

Question

我正在尝试制作一个java程序，它将使用我想要的任何用户名以离线模式启动minecraft，这样我就可以拥有像Notch和deadmau5这样的用户名，并且我正在使用此代码在mac和windows上启动它(当前在mac上测试):

public void startMacMinecraft(String username) throws IOException,
        InterruptedException {
    System.out.println(defaultDirectory());

    String sysUser = System.getProperty("user.name");
    String commandString = "java -cp "
            + defaultDirectory()
            + "/minecraft/bin/minecraft.jar:"
            + defaultDirectory()
            + "/minecraft/bin/lwjgl.jar:"
            + defaultDirectory()
            + "/minecraft/bin/lwjgl_util.jar:"
            + defaultDirectory()
            + "/minecraft/bin/jinput.jar: -Djava.library.path="
            + defaultDirectory()
            + "/minecraft/bin/natives -Xmx1024M -Xms512M net.minecraft.client.Minecraft '"
            + username + "'";
    CommandLine command = CommandLine.parse(commandString);
    DefaultExecutor executor = new DefaultExecutor();
    int exitValue = executor.execute(command);
    System.out.println(exitValue);

    System.out.println("\nTry Two:\n");
    String javaExe = System.getProperty("java.home") + "/bin/java";

}

public void startWinMinecraft(String username) throws IOException,
        InterruptedException {
    String sysUser = System.getProperty("user.name");
    String commandString = "Java -Xms512m -Xmx1024m -cp \"%APPDATA%\\.minecraft\\bin\\*\" -Djava.library.path=\"%APPDATA%\\.minecraft\\bin\\natives net.minecraft.client.Minecraft \""
            + username + "\"";
    CommandLine command = CommandLine.parse(commandString);
    DefaultExecutor executor = new DefaultExecutor();
    int exitValue = executor.execute(command);
    System.out.println(exitValue);

}

private static String defaultDirectory() {
    String OS = System.getProperty("os.name").toUpperCase();
    if (OS.contains("WIN"))
        return System.getenv("APPDATA");
    else if (OS.contains("MAC"))
        return System.getProperty("user.home") + "/Library/Application "
                + "Support";
    else if (OS.contains("NUX"))
        return System.getProperty("user.home");
    return System.getProperty("user.dir");
}

我正在尝试改编这个applescript，我之前运行过它并从https://gaming.stackexchange.com/questions/46608/how-can-i-run-minecraft-in-offline-mode-on-os-x-and-still-have-my-name获得，我将粘贴在这里:

property user_name : "Player"

display dialog "Enter A User Name" default answer "" buttons {"Cancel", "Continue"} default button 2
set the user_name to text returned of the result

set UsrApp to (path to current user folder)
set UsrApp_unx to POSIX path of UsrApp

set MineScript to "java -cp " & UsrApp_unx & "Library/Application\\ Support/minecraft/bin/minecraft.jar:" & UsrApp_unx & "Library/Application\\ Support/minecraft/bin/lwjgl.jar:" & UsrApp_unx & "Library/Application\\ Support/minecraft/bin/lwjgl_util.jar:" & UsrApp_unx & "Library/Application\\ Support/minecraft/bin/jinput.jar: -Djava.library.path=" & UsrApp_unx & "Library/Application\\ Support/minecraft/bin/natives -Xmx1024M -Xms512M net.minecraft.client.Minecraft '" & user_name & "'"

do shell script MineScript

当我运行 applescript 时，它工作得很好，但是当我运行我的改编版本时，它给了我一个类未找到错误:

    Logging in as: Player
/Users/Connor/Library/Application Support
Exception in thread "main" java.lang.NoClassDefFoundError: Support/minecraft/bin/minecraft/jar:/Users/Connor/Library/Application
Caused by: java.lang.ClassNotFoundException: Support.minecraft.bin.minecraft.jar:.Users.Connor.Library.Application
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
org.apache.commons.exec.ExecuteException: Process exited with an error: 1 (Exit value: 1)
    at org.apache.commons.exec.DefaultExecutor.executeInternal(DefaultExecutor.java:377)
    at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:160)
    at org.apache.commons.exec.DefaultExecutor.execute(DefaultExecutor.java:147)
    at info.connorbp.GUIApp.LoginPanel.startMacMinecraft(LoginPanel.java:137)
    at info.connorbp.GUIApp.LoginPanel$1.actionPerformed(LoginPanel.java:82)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.java:6375)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    at java.awt.Component.processEvent(Component.java:6140)
    at java.awt.Container.processEvent(Container.java:2083)
    at java.awt.Component.dispatchEventImpl(Component.java:4737)
    at java.awt.Container.dispatchEventImpl(Container.java:2141)
    at java.awt.Component.dispatchEvent(Component.java:4565)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4619)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4280)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4210)
    at java.awt.Container.dispatchEventImpl(Container.java:2127)
    at java.awt.Window.dispatchEventImpl(Window.java:2482)
    at java.awt.Component.dispatchEvent(Component.java:4565)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:684)
    at java.awt.EventQueue.access$000(EventQueue.java:85)
    at java.awt.EventQueue$1.run(EventQueue.java:643)
    at java.awt.EventQueue$1.run(EventQueue.java:641)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:657)
    at java.awt.EventQueue$2.run(EventQueue.java:655)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:654)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

有谁知道我做错了什么或如何解决它？

编辑:

更奇怪的是，我进入了 applescript 区域的事件区域，找到了 applescript 正在运行的确切命令:

java -cp /Users/Connor/Library/Application\\ Support/minecraft/bin/minecraft.jar:/Users/Connor/Library/Application\\ Support/minecraft/bin/lwjgl.jar:/Users/Connor/Library/Application\\ Support/minecraft/bin/lwjgl_util.jar:/Users/Connor/Library/Application\\ Support/minecraft/bin/jinput.jar: -Djava.library.path=/Users/Connor/Library/Application\\ Support/minecraft/bin/natives -Xmx1024M -Xms512M net.minecraft.client.Minecraft 'username'

即使尝试运行直接来自 applescript 的脚本，我也会收到另一个 java.lang.NoClassDefFoundError 错误，即使我直接从正在运行的 applescript 获取命令。

Answer 1

在默认启动器中，您提供的任何用户名都会用于离线模式，因此编写单独的启动器是没有意义的。

无论如何，反编译启动器应该能让我们很好地了解如何启动游戏。

代码较多，建议自行反编译。对于 Mac，JD-GUI 做得还不错。对于 Windows，我不能推荐反编译器，但这就是 google 的用途:)

获得启动器源代码后，请查看 net.minecraft.LauncherFrame 中的 public void login(String userName, String password)。同样相关的是 net.minecraft.Launcher。

通读本文应该会让您对如何启动 Minecraft 有一个很好的了解。