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;
    }
```
return ret.toString();
    }
    /**
     * name to desc.
     * java.util.Map[][] => "[[Ljava/util/Map;"
     *
     * @param name name.
     * @return desc.
     */
    public static String name2desc(String name) {
        StringBuilder sb = new StringBuilder();
        int c = 0, index = name.indexOf('[');
        if (index > 0) {
            c = (name.length() - index) / 2;
            name = name.substring(0, index);
        }
        while (c-- > 0) sb.append("[");
        if ("void".equals(name)) sb.append(JVM_VOID);
        else if ("boolean".equals(name)) sb.append(JVM_BOOLEAN);
        else if ("byte".equals(name)) sb.append(JVM_BYTE);
        else if ("char".equals(name)) sb.append(JVM_CHAR);
        else if ("double".equals(name)) sb.append(JVM_DOUBLE);
        else if ("float".equals(name)) sb.append(JVM_FLOAT);
        else if ("int".equals(name)) sb.append(JVM_INT);
        else if ("long".equals(name)) sb.append(JVM_LONG);
        else if ("short".equals(name)) sb.append(JVM_SHORT);
        else sb.append('L').append(name.replace('.', '/')).append(';');
        return sb.toString();
    }
    /**