自定义类加载器 1

自定义类加载器 一

package com.yuan.common.asm;

public abstract class AbstractClassLoader extends ClassLoader {
???
??? public AbstractClassLoader(ClassLoader parent){
??? ??? super(parent);
??? }
???
??? protected String getPackageName(String className){
??? ??? String packageName = "";
??? ??? int index = className.lastIndexOf(".");
??? ??? if(index != -1){
??? ??? ??? packageName = className.substring(0, index);
??? ??? }
??? ??? return packageName;
??? }
???
??? protected Class<?> findClass(String name)throws ClassNotFoundException{
??? ??? String packageName = getPackageName(name);
??? ??? if(super.getPackage(packageName) == null){
??? ??? ??? super.definePackage(packageName, packageName, "1.0", "hx", packageName, "1.0", "hx", null);
??? ??? }
??? ??? try {
??? ??? ??? return this.getParent().loadClass(name);
??? ??? } catch (Exception e) {
??? ??? ??? byte[] b = loadClassData(name);
??? ??????? return defineClass(name, b, 0, b.length);
??? ??? }
??? ???
??? }
???
??? protected abstract byte[] loadClassData(String name) throws ClassNotFoundException;

}