Why is reflection used in the PropertiesUtil method?

[stone-98]

nacos/sys/src/main/java/com/alibaba/nacos/sys/utils/PropertiesUtil.java

Lines 53 to 63 in f3fb428

	public static <T> T handleSpringBinder(Environment environment, String prefix, Class<T> targetClass)
	throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, ClassNotFoundException {
	Class<?> binderClass = Class.forName("org.springframework.boot.context.properties.bind.Binder");
	Method getMethod = binderClass.getDeclaredMethod("get", Environment.class);
	Method bindMethod = binderClass.getDeclaredMethod("bind", String.class, Class.class);
	Object binderObject = getMethod.invoke(null, environment);
	String prefixParam = prefix.endsWith(".") ? prefix.substring(0, prefix.length() - 1) : prefix;
	Object bindResultObject = bindMethod.invoke(binderObject, prefixParam, targetClass);
	Method resultGetMethod = bindResultObject.getClass().getDeclaredMethod("get");
	return (T) resultGetMethod.invoke(bindResultObject);
	}

Wouldn't it be better to replace it this way?

    public static <T> T handleSpringBinder(Environment environment, String prefix, Class<T> targetClass)
            throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, ClassNotFoundException {
        String prefixParam = prefix.endsWith(".") ? prefix.substring(0, prefix.length() - 1) : prefix;
        Binder binder = Binder.get(environment);
        return binder.bind(prefixParam, targetClass).orElse(null);
    }

[KomachiSion]

应该是旧版本的spring没有暴露出来这个接口，或者是这个方法直接调用会有校验导致报错，所以通过反射来操作。

如果新版本spring可以直接使用这个方法了， 可以进行优化修改。建议修改完之后做一个完整的测试。

目前会使用这个方法的主要是插件体系，可以拿鉴权插件来修改试一下。

[stone-98]

@i will solve it@