调用DynamicClassLoader.compile进行编译,并打印结果。 4. 动态加载编译好的Class文件 调用动态加载方法,将编译好的Class文件载入并使用其中的方法: try{Class<?>helloWorldClass=DynamicClassLoader.loadClass("HelloWorld","path/to/your/class/files");Objectinstance=helloWorldClass.getDeclaredConstructor().newInstance(...
一旦类被编译并生成.class文件,我们就可以使用ClassLoader来加载它。 importjava.io.File;importjava.net.URL;importjava.net.URLClassLoader;publicclassDynamicLoader{publicObjectloadClass(StringclassName,StringfilePath)throwsException{Filefile=newFile(filePath);URL[]urls={file.getParentFile().toURI().toURL()...
/** * 动态编译一个java源文件并加载编译生成的class * @param name 类的全限定包名 不带后缀 例如com.test.Notice 而不要写成com.test.Notice.java * @throws java.io.IOException */ public static Class<?> dynamicLoadClass(String name) throws IOException, ClassNotFoundException { if (!isClassExist...
static class ExtClassLoader extends URLClassLoader { private static volatile ExtClassLoader instance = null; /** * create an ExtClassLoader. The ExtClassLoader is created * within a context that limits which files it can read */ public static ExtClassLoader getExtClassLoader() throws IOExceptio...
该类JavaClassObject jco=fileManager.getJavaClassObject();DynamicClassLoader dynamicClassLoader=newDynamicClassLoader(this.parentClassLoader);Class clazz=dynamicClassLoader.loadClass(fullClassName,jco);try{dynamicClassLoader.close();//卸载ClassLoader所加载的类ClassLoaderUtil.releaseLoader(dynamicClassLoader);...
publicclassTestDynamicLoading {publicstaticvoidmain(String[] args) {newA(); System.out.println("***---***");newB();newC();newC();newD();newD(); } }classA{ }classB{ }classC{//static语句块,只调用一次。static{ System.out.println("CCCCCCCCCCCCCCCCCCCCCCC...
process.end(-1, "Can not find classloader with hashCode: " + hashCode + ".");return; } } DynamicCompiler dynamicCompiler=newDynamicCompiler(classloader); Charset charset=Charset.defaultCharset();if(encoding !=null) { charset=Charset.forName(encoding); ...
public class DynamicClassLoader { public static void main(String[] args) { try { // 创建自定义类加载器 DynamicLoader loader = new DynamicLoader(); // 加载HelloWorld类 Class clazz = loader.loadClass("HelloWorld"); // 创建HelloWorld实例 Object obj = clazz.newInstance(); // 调用HelloWorld的...
4. 示例代码:ClassLoader动态实例化类的过程 以下是一个简单的示例代码,演示了如何使用URLClassLoader动态加载并实例化一个类: java import java.io.File; import java.net.URL; import java.net.URLClassLoader; public class DynamicClassLoaderExample { public static void main(String[] args) { try { //...
public MyClassLoader(ClassLoader parent) { super(parent); } public Class loadClass(String name) throws ClassNotFoundException { if(!"reflection.MyObject".equals(name)) return super.loadClass(name); try { String url = "file:C:/data/projects/tutorials/web/WEB-INF/" + ...