用jarslink做module隔离时,dubbo调用会抛ClassNotFoundException.经查是ClassLoader不一致.

```
    public static Class<?> getReturnType(Invocation invocation) {
        try {
            if (invocation != null && invocation.getInvoker() != null
                    && invocation.getInvoker().getUrl() != null
                    && !invocation.getMethodName().startsWith("$")) {
                String service = invocation.getInvoker().getUrl().getServiceInterface();
                if (service != null && service.length() > 0) {
                    Class<?> cls = ReflectUtils.forName(service);
                    Method method = cls.getMethod(invocation.getMethodName(), invocation.getParameterTypes());
                    if (method.getReturnType() == void.class) {
                        return null;
                    }
                    return method.getReturnType();
                }
            }
        } catch (Throwable t) {
            logger.warn(t.getMessage(), t);
        }
        return null;
    }
```
* desc to name.
     * "[[I" => "int[][]"
     *
     * @param desc desc.
     * @return name.
     */
    public static String desc2name(String desc) {
        StringBuilder sb = new StringBuilder();
        int c = desc.lastIndexOf('[') + 1;
        if (desc.length() == c + 1) {
            switch (desc.charAt(c)) {
                case JVM_VOID: {
                    sb.append("void");
                    break;
                }
                case JVM_BOOLEAN: {
                    sb.append("boolean");
                    break;
                }
                case JVM_BYTE: {
                    sb.append("byte");
                    break;
                }
                case JVM_CHAR: {
                    sb.append("char");
                    break;
                }
                case JVM_DOUBLE: {
                    sb.append("double");
                    break;