您必须在运行时将 Lwjgl 的本机库链接到您的应用程序。感谢 gradle，本机库位于类路径中……某处。
您可以继续找到它们，将它们提取到一个临时位置，然后链接它们，但已经有一个 example project 为您做这件事。
您需要做的就是将他们的类SharedLibraryLoader 包含到您的项目中并调用load() 方法。
如果此链接失效，这里是您需要的课程的全部内容：
/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.UUID;
import java.util.zip.CRC32;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
/** Loads shared libraries from JAR files. Call {@link SharedLibraryLoader#load() to load the
* required LWJGL 3 native shared libraries.
* @author mzechner
* @author Nathan Sweet */
public class SharedLibraryLoader {
static public boolean isWindows = System.getProperty("os.name").contains("Windows");
static public boolean isLinux = System.getProperty("os.name").contains("Linux");
static public boolean isMac = System.getProperty("os.name").contains("Mac");
static public boolean isIos = false;
static public boolean isAndroid = false;
static public boolean isARM = System.getProperty("os.arch").startsWith("arm");
static public boolean is64Bit = System.getProperty("os.arch").equals("amd64")
|| System.getProperty("os.arch").equals("x86_64");
// JDK 8 only.
static public String abi = (System.getProperty("sun.arch.abi") != null ? System.getProperty("sun.arch.abi") : "");
static {
String vm = System.getProperty("java.runtime.name");
if (vm != null && vm.contains("Android Runtime")) {
isAndroid = true;
isWindows = false;
isLinux = false;
isMac = false;
is64Bit = false;
}
if (!isAndroid && !isWindows && !isLinux && !isMac) {
isIos = true;
is64Bit = false;
}
}
static boolean load = true;
static {
// Don't extract natives if using JWS.
try {
Method method = Class.forName("javax.jnlp.ServiceManager").getDeclaredMethod("lookup", new Class[] {String.class});
method.invoke(null, "javax.jnlp.PersistenceService");
load = false;
} catch (Throwable ex) {
load = true;
}
}
/** Extracts the LWJGL native libraries from the classpath and sets the "org.lwjgl.librarypath" system property. */
static public synchronized void load () {
load(false);
}
/** Extracts the LWJGL native libraries from the classpath and sets the "org.lwjgl.librarypath" system property. */
static public synchronized void load (boolean disableOpenAL) {
if (!load) return;
SharedLibraryLoader loader = new SharedLibraryLoader();
File nativesDir = null;
try {
if (SharedLibraryLoader.isWindows) {
nativesDir = loader.extractFile(SharedLibraryLoader.is64Bit ? "lwjgl.dll" : "lwjgl32.dll", null).getParentFile();
if (!disableOpenAL)
loader.extractFile(SharedLibraryLoader.is64Bit ? "OpenAL.dll" : "OpenAL32.dll", nativesDir.getName());
} else if (SharedLibraryLoader.isMac) {
nativesDir = loader.extractFile("liblwjgl.dylib", null).getParentFile();
if (!disableOpenAL) loader.extractFile("libopenal.dylib", nativesDir.getName());
} else if (SharedLibraryLoader.isLinux) {
nativesDir = loader.extractFile(SharedLibraryLoader.is64Bit ? "liblwjgl.so" : "liblwjgl32.so", null).getParentFile();
if (!disableOpenAL)
loader.extractFile(SharedLibraryLoader.is64Bit ? "libopenal.so" : "libopenal32.so", nativesDir.getName());
}
} catch (Throwable ex) {
throw new RuntimeException("Unable to extract LWJGL natives.", ex);
}
System.setProperty("org.lwjgl.librarypath", nativesDir.getAbsolutePath());
load = false;
}
static private final HashSet<String> loadedLibraries = new HashSet<String>();
private String nativesJar;
public SharedLibraryLoader () {
}
/** Fetches the natives from the given natives jar file. Used for testing a shared lib on the fly.
* @param nativesJar */
public SharedLibraryLoader (String nativesJar) {
this.nativesJar = nativesJar;
}
/** Returns a CRC of the remaining bytes in the stream. */
public String crc (InputStream input) {
if (input == null) throw new IllegalArgumentException("input cannot be null.");
CRC32 crc = new CRC32();
byte[] buffer = new byte[4096];
try {
while (true) {
int length = input.read(buffer);
if (length == -1) break;
crc.update(buffer, 0, length);
}
} catch (Exception ex) {
if(input != null) {
try {
input.close();
} catch (IOException e) {
}
}
}
return Long.toString(crc.getValue(), 16);
}
/** Maps a platform independent library name to a platform dependent name. */
public String mapLibraryName (String libraryName) {
if (isWindows) return libraryName + (is64Bit ? "64.dll" : ".dll");
if (isLinux) return "lib" + libraryName + (isARM ? "arm" + abi : "") + (is64Bit ? "64.so" : ".so");
if (isMac) return "lib" + libraryName + (is64Bit ? "64.dylib" : ".dylib");
return libraryName;
}
/** Loads a shared library for the platform the application is running on.
* @param libraryName The platform independent library name. If not contain a prefix (eg lib) or suffix (eg .dll). */
public synchronized void load (String libraryName) {
// in case of iOS, things have been linked statically to the executable, bail out.
if (isIos) return;
libraryName = mapLibraryName(libraryName);
if (loadedLibraries.contains(libraryName)) return;
try {
if (isAndroid)
System.loadLibrary(libraryName);
else
loadFile(libraryName);
} catch (Throwable ex) {
throw new RuntimeException("Couldn't load shared library '" + libraryName + "' for target: "
+ System.getProperty("os.name") + (is64Bit ? ", 64-bit" : ", 32-bit"), ex);
}
loadedLibraries.add(libraryName);
}
private InputStream readFile (String path) {
if (nativesJar == null) {
InputStream input = SharedLibraryLoader.class.getResourceAsStream("/" + path);
if (input == null) throw new RuntimeException("Unable to read file for extraction: " + path);
return input;
}
// Read from JAR.
ZipFile file = null;
try {
file = new ZipFile(nativesJar);
ZipEntry entry = file.getEntry(path);
if (entry == null) throw new RuntimeException("Couldn't find '" + path + "' in JAR: " + nativesJar);
return file.getInputStream(entry);
} catch (IOException ex) {
throw new RuntimeException("Error reading '" + path + "' in JAR: " + nativesJar, ex);
} finally {
if(file != null) {
try {
file.close();
} catch (IOException e) {
}
}
}
}
/** Extracts the specified file into the temp directory if it does not already exist or the CRC does not match. If file
* extraction fails and the file exists at java.library.path, that file is returned.
* @param sourcePath The file to extract from the classpath or JAR.
* @param dirName The name of the subdirectory where the file will be extracted. If null, the file's CRC will be used.
* @return The extracted file. */
public File extractFile (String sourcePath, String dirName) throws IOException {
try {
String sourceCrc = crc(readFile(sourcePath));
if (dirName == null) dirName = sourceCrc;
File extractedFile = getExtractedFile(dirName, new File(sourcePath).getName());
return extractFile(sourcePath, sourceCrc, extractedFile);
} catch (RuntimeException ex) {
// Fallback to file at java.library.path location, eg for applets.
File file = new File(System.getProperty("java.library.path"), sourcePath);
if (file.exists()) return file;
throw ex;
}
}
/** Returns a path to a file that can be written. Tries multiple locations and verifies writing succeeds. */
private File getExtractedFile (String dirName, String fileName) {
// Temp directory with username in path.
File idealFile = new File(System.getProperty("java.io.tmpdir") + "/libgdx" + System.getProperty("user.name") + "/"
+ dirName, fileName);
if (canWrite(idealFile)) return idealFile;
// System provided temp directory.
try {
File file = File.createTempFile(dirName, null);
if (file.delete()) {
file = new File(file, fileName);
if (canWrite(file)) return file;
}
} catch (IOException ignored) {
}
// User home.
File file = new File(System.getProperty("user.home") + "/.libgdx/" + dirName, fileName);
if (canWrite(file)) return file;
// Relative directory.
file = new File(".temp/" + dirName, fileName);
if (canWrite(file)) return file;
return idealFile; // Will likely fail, but we did our best.
}
/** Returns true if the parent directories of the file can be created and the file can be written. */
private boolean canWrite (File file) {
File parent = file.getParentFile();
File testFile;
if (file.exists()) {
if (!file.canWrite() || !canExecute(file)) return false;
// Don't overwrite existing file just to check if we can write to directory.
testFile = new File(parent, UUID.randomUUID().toString());
} else {
parent.mkdirs();
if (!parent.isDirectory()) return false;
testFile = file;
}
try {
new FileOutputStream(testFile).close();
if (!canExecute(testFile)) return false;
return true;
} catch (Throwable ex) {
return false;
} finally {
testFile.delete();
}
}
private boolean canExecute (File file) {
try {
Method canExecute = File.class.getMethod("canExecute");
if ((Boolean)canExecute.invoke(file)) return true;
Method setExecutable = File.class.getMethod("setExecutable", boolean.class, boolean.class);
setExecutable.invoke(file, true, false);
return (Boolean)canExecute.invoke(file);
} catch (Exception ignored) {
}
return false;
}
private File extractFile (String sourcePath, String sourceCrc, File extractedFile) throws IOException {
String extractedCrc = null;
if (extractedFile.exists()) {
try {
extractedCrc = crc(new FileInputStream(extractedFile));
} catch (FileNotFoundException ignored) {
}
}
// If file doesn't exist or the CRC doesn't match, extract it to the temp dir.
if (extractedCrc == null || !extractedCrc.equals(sourceCrc)) {
try {
InputStream input = readFile(sourcePath);
extractedFile.getParentFile().mkdirs();
FileOutputStream output = new FileOutputStream(extractedFile);
byte[] buffer = new byte[4096];
while (true) {
int length = input.read(buffer);
if (length == -1) break;
output.write(buffer, 0, length);
}
input.close();
output.close();
} catch (IOException ex) {
throw new RuntimeException("Error extracting file: " + sourcePath + "\nTo: " + extractedFile.getAbsolutePath(), ex);
}
}
return extractedFile;
}
/** Extracts the source file and calls System.load. Attemps to extract and load from multiple locations. Throws runtime
* exception if all fail. */
private void loadFile (String sourcePath) {
String sourceCrc = crc(readFile(sourcePath));
String fileName = new File(sourcePath).getName();
// Temp directory with username in path.
File file = new File(System.getProperty("java.io.tmpdir") + "/libgdx" + System.getProperty("user.name") + "/" + sourceCrc,
fileName);
Throwable ex = loadFile(sourcePath, sourceCrc, file);
if (ex == null) return;
// System provided temp directory.
try {
file = File.createTempFile(sourceCrc, null);
if (file.delete() && loadFile(sourcePath, sourceCrc, file) == null) return;
} catch (Throwable ignored) {
}
// User home.
file = new File(System.getProperty("user.home") + "/.libgdx/" + sourceCrc, fileName);
if (loadFile(sourcePath, sourceCrc, file) == null) return;
// Relative directory.
file = new File(".temp/" + sourceCrc, fileName);
if (loadFile(sourcePath, sourceCrc, file) == null) return;
// Fallback to java.library.path location, eg for applets.
file = new File(System.getProperty("java.library.path"), sourcePath);
if (file.exists()) {
System.load(file.getAbsolutePath());
return;
}
throw new RuntimeException(ex);
}
/** @return null if the file was extracted and loaded. */
private Throwable loadFile (String sourcePath, String sourceCrc, File extractedFile) {
try {
System.load(extractFile(sourcePath, sourceCrc, extractedFile).getAbsolutePath());
return null;
} catch (Throwable ex) {
ex.printStackTrace();
return ex;
}
}
}
此示例项目适用于 Lwjgl 3（按照 OP 的要求）。但是，如果您使用的是 Lwjgl 2.9.x，它仍然可以工作，您只需在 load 方法中更改库的名称即可。