- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 2.7.4.1
* Java version: 1.8


### Actual Result

[https://github.com/apache/dubbo/blob/f89a1a8dadb419a06494433ed53b9a35f69c36dc/dubbo-common/src/main/java/org/apache/dubbo/common/utils/NetUtils.java#L497](https://github.com/apache/dubbo/blob/f89a1a8dadb419a06494433ed53b9a35f69c36dc/dubbo-common/src/main/java/org/apache/dubbo/common/utils/NetUtils.java#L497)


[https://github.com/apache/dubbo/blob/f89a1a8dadb419a06494433ed53b9a35f69c36dc/dubbo-common/src/main/java/org/apache/dubbo/common/utils/ReflectUtils.java#L1207](https://github.com/apache/dubbo/blob/f89a1a8dadb419a06494433ed53b9a35f69c36dc/dubbo-common/src/main/java/org/apache/dubbo/common/utils/ReflectUtils.java#L1207)


### Expected Result

```
qulified  ==> qualified

form ==> from
```

}
    /**
     * get class array instance.
     *
     * @param cl   ClassLoader instance.
     * @param desc desc.
     * @return Class[] class array.
     * @throws ClassNotFoundException
     */
    private static Class<?>[] desc2classArray(ClassLoader cl, String desc) throws ClassNotFoundException {
        if (desc.length() == 0) {
            return EMPTY_CLASS_ARRAY;
        }
        List<Class<?>> cs = new ArrayList<Class<?>>();
        Matcher m = DESC_PATTERN.matcher(desc);
        while (m.find()) {
            cs.add(desc2class(cl, m.group()));
        }
        return cs.toArray(EMPTY_CLASS_ARRAY);
    }
    /**
     * Find method from method signature
     *
     * @param clazz      Target class to find method
     * @param methodName Method signature, e.g.: method1(int, String). It is allowed to provide method name only, e.g.: method2
     * @return target method
     * @throws NoSuchMethodException
     * @throws ClassNotFoundException
     * @throws IllegalStateException  when multiple methods are found (overridden method when parameter info is not provided)
     */