小编Tho*_*ker的帖子

我编写了两个自定义类加载器来动态加载代码.

第一个从Jar中加载代码:

package com.customweb.build.bean.include;

import java.net.URL;
import java.net.URLClassLoader;

import com.customweb.build.process.ILeafClassLoader;

public class JarClassLoader extends URLClassLoader implements ILeafClassLoader {

    public JarClassLoader(URL[] urls, ClassLoader parent) {
        super(urls, parent);
    }

    @Override
    public Class<?> findClassWithoutCycles(String name) throws ClassNotFoundException {

        Class<?> c = findLoadedClass(name);
        if (c != null) {
            return c;
        }

        return findClass(name);
    }

    @Override
    protected Class<?> findClass(String qualifiedClassName) throws ClassNotFoundException {
        synchronized (this.getParent()) {
            synchronized (this) {
                return super.findClass(qualifiedClassName);
            }
        }
    }

    @Override
    public URL findResourceWithoutCycles(String name) {
        return super.findResource(name);
    }

    @Override
    public …