哪些场景下可能需要自定义类加载器？

public class PluginClassLoader extends ClassLoader {
    private String pluginPath;

    public PluginClassLoader(String pluginPath) {
        this.pluginPath = pluginPath;
    }

    @Override
    public Class<?> findClass(String name) throws ClassNotFoundException {
        byte[] classData = loadClassData(name);  // 自定义方法，从插件路径加载字节码
        return defineClass(name, classData, 0, classData.length);
    }

    private byte[] loadClassData(String className) {
        // 从插件路径加载字节码文件（例如从文件系统或网络）
        return new byte[0];
    }
}

public class HotDeployClassLoader extends ClassLoader {
    @Override
    public Class<?> findClass(String name) throws ClassNotFoundException {
        // 热部署过程，检查类文件是否被更新或替换
        byte[] classData = loadUpdatedClassData(name);  // 加载更新后的字节码
        return defineClass(name, classData, 0, classData.length);
    }

    private byte[] loadUpdatedClassData(String className) {
        // 从文件系统或其他地方加载最新的字节码
        return new byte[0];
    }
}

public class ModuleClassLoader extends ClassLoader {
    private String modulePath;

    public ModuleClassLoader(String modulePath) {
        this.modulePath = modulePath;
    }

    @Override
    public Class<?> findClass(String name) throws ClassNotFoundException {
        byte[] classData = loadModuleClassData(name);  // 加载模块类
        return defineClass(name, classData, 0, classData.length);
    }

    private byte[] loadModuleClassData(String className) {
        // 从指定的模块路径加载字节码
        return new byte[0];
    }
}

public class NetworkClassLoader extends ClassLoader {
    private String serverUrl;

    public NetworkClassLoader(String serverUrl) {
        this.serverUrl = serverUrl;
    }

    @Override
    public Class<?> findClass(String name) throws ClassNotFoundException {
        byte[] classData = loadClassFromNetwork(name);  // 从网络加载类字节码
        return defineClass(name, classData, 0, classData.length);
    }

    private byte[] loadClassFromNetwork(String className) {
        // 从远程服务器加载字节码（例如通过HTTP请求）
        return new byte[0];
    }
}

public class VersionConflictClassLoader extends ClassLoader {
    private String libraryPath;

    public VersionConflictClassLoader(String libraryPath) {
        this.libraryPath = libraryPath;
    }

    @Override
    public Class<?> findClass(String name) throws ClassNotFoundException {
        byte[] classData = loadClassDataForVersion(name);  // 为特定版本加载类
        return defineClass(name, classData, 0, classData.length);
    }

    private byte[] loadClassDataForVersion(String className) {
        // 根据版本信息从特定路径加载类字节码
        return new byte[0];
    }
}