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package loader;import java.io.*;public class MyLoader extends ClassLoader{private String path;public MyLoader(String p){path = p;}@Overrideprotected Class<?> findClass(String name) throws ClassNotFoundException{Class clazz = null;byte[] classData = loadClassData(name);if(classData == null){throw new IllegalAccessError("no class found");}clazz = defineClass(name, classData, 0, classData.length);return clazz;}private byte[] loadClassData(String name){String fileName = getFullName(name);File file = new File(path, fileName);InputStream is = null;ByteArrayOutputStream baos = null;if(file.exists()){try{baos = new ByteArrayOutputStream();is = new FileInputStream(file);byte[] buffer = new byte[512];int length = 0;while ((length = is.read(buffer)) > 0){baos.write(buffer, 0, length);}return baos.toByteArray();} catch (Exception e){try{is.close();baos.close();} catch (IOException e1){e1.printStackTrace();}}}return null;}private String getFullName(String name){int i = name.lastIndexOf(".");if(i == -1){return name + ".class";}else{return name.substring(i + 1) + ".class";}}}
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