我有一个工作实现，现在从 SWT FAQ 引用。
此方法现在可用作 ANT 任务：SWTJar
[EDIT] SWTJar 现已更新为使用上述 Alexey Romanov 的解决方案。
build.xml
首先我构建了一个包含我所有应用程序类的 jar。
<!-- UI (Stage 1) -->
<jarjar jarfile="./build/tmp/intrace-ui-wrapper.jar">
<fileset dir="./build/classes" includes="**/shared/*.class" />
<fileset dir="./build/classes" includes="**/client/gui/**/*.class" />
<zipfileset excludes="META-INF/*.MF" src="lib/miglayout-3.7.3.1-swt.jar"/>
</jarjar>
接下来，我构建一个 jar 来包含以下所有内容：
- JAR
- 类
- “Jar-In-Jar”类加载器类
- 一个特殊的加载器类 - 见下文
这是来自 build.xml 的片段。
<!-- UI (Stage 2) -->
<jarjar jarfile="./build/jars/intrace-ui.jar">
<manifest>
<attribute name="Main-Class" value="org.intrace.client.loader.TraceClientLoader" />
<attribute name="Class-Path" value="." />
</manifest>
<fileset dir="./build/classes" includes="**/client/loader/*.class" />
<fileset dir="./build/tmp" includes="intrace-ui-wrapper.jar" />
<fileset dir="./lib" includes="swt-*.jar" />
<zipfileset excludes="META-INF/*.MF" src="lib/jar-in-jar-loader.jar"/>
</jarjar>
TraceClientLoader.java
这个加载器类使用 jar-in-jar-loader 创建一个 ClassLoader，它从两个 jar 加载类。
一旦我们有了这个类加载器，我们就可以使用反射启动实际的应用程序主方法。
public class TraceClientLoader
{
public static void main(String[] args) throws Throwable
{
ClassLoader cl = getSWTClassloader();
Thread.currentThread().setContextClassLoader(cl);
try
{
try
{
System.err.println("Launching InTrace UI ...");
Class<?> c = Class.forName("org.intrace.client.gui.TraceClient", true, cl);
Method main = c.getMethod("main", new Class[]{args.getClass()});
main.invoke((Object)null, new Object[]{args});
}
catch (InvocationTargetException ex)
{
if (ex.getCause() instanceof UnsatisfiedLinkError)
{
System.err.println("Launch failed: (UnsatisfiedLinkError)");
String arch = getArch();
if ("32".equals(arch))
{
System.err.println("Try adding '-d64' to your command line arguments");
}
else if ("64".equals(arch))
{
System.err.println("Try adding '-d32' to your command line arguments");
}
}
else
{
throw ex;
}
}
}
catch (ClassNotFoundException ex)
{
System.err.println("Launch failed: Failed to find main class - org.intrace.client.gui.TraceClient");
}
catch (NoSuchMethodException ex)
{
System.err.println("Launch failed: Failed to find main method");
}
catch (InvocationTargetException ex)
{
Throwable th = ex.getCause();
if ((th.getMessage() != null) &&
th.getMessage().toLowerCase().contains("invalid thread access"))
{
System.err.println("Launch failed: (SWTException: Invalid thread access)");
System.err.println("Try adding '-XstartOnFirstThread' to your command line arguments");
}
else
{
throw th;
}
}
}
private static ClassLoader getSWTClassloader()
{
ClassLoader parent = TraceClientLoader.class.getClassLoader();
URL.setURLStreamHandlerFactory(new RsrcURLStreamHandlerFactory(parent));
String swtFileName = getSwtJarName();
try
{
URL intraceFileUrl = new URL("rsrc:intrace-ui-wrapper.jar");
URL swtFileUrl = new URL("rsrc:" + swtFileName);
System.err.println("Using SWT Jar: " + swtFileName);
ClassLoader cl = new URLClassLoader(new URL[] {intraceFileUrl, swtFileUrl}, parent);
try
{
// Check we can now load the SWT class
Class.forName("org.eclipse.swt.widgets.Layout", true, cl);
}
catch (ClassNotFoundException exx)
{
System.err.println("Launch failed: Failed to load SWT class from jar: " + swtFileName);
throw new RuntimeException(exx);
}
return cl;
}
catch (MalformedURLException exx)
{
throw new RuntimeException(exx);
}
}
private static String getSwtJarName()
{
// Detect OS
String osName = System.getProperty("os.name").toLowerCase();
String swtFileNameOsPart = osName.contains("win") ? "win" : osName
.contains("mac") ? "osx" : osName.contains("linux")
|| osName.contains("nix") ? "linux" : "";
if ("".equals(swtFileNameOsPart))
{
throw new RuntimeException("Launch failed: Unknown OS name: " + osName);
}
// Detect 32bit vs 64 bit
String swtFileNameArchPart = getArch();
String swtFileName = "swt-" + swtFileNameOsPart + swtFileNameArchPart
+ "-3.6.2.jar";
return swtFileName;
}
private static String getArch()
{
// Detect 32bit vs 64 bit
String jvmArch = System.getProperty("os.arch").toLowerCase();
String arch = (jvmArch.contains("64") ? "64" : "32");
return arch;
}
}
[编辑] 如上所述，对于那些寻找“jar-in-jar 类加载器”的人：它包含在 Eclipse 的 JDT（基于 Eclipse 的 Java IDE）中。使用归档器打开 org.eclipse.jdt.ui_*version_number*.jar，您会在其中找到一个文件 jar-in-jar-loader.zip。我将其重命名为 jar-in-jar-loader.jar。
intrace-ui.jar - 这是我使用上述过程构建的 jar。您应该能够在任何 win32/64、linux32/64 和 osx32/64 上运行这个 jar。
[编辑] 这个答案现在引用自 SWT FAQ。