Spring的replace-method标签

    public void parseReplacedMethodSubElements(Element beanEle, MethodOverrides overrides) {
        NodeList nl = beanEle.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            //仅当在Spring默认bean的子元素下且为
　　　　　　　if (isCandidateElement(node) && nodeNameEquals(node, REPLACED_METHOD_ELEMENT)) {
                Element replacedMethodEle = (Element) node;
                //提取要替换的旧的方法
　　　　　　　　　 String name = replacedMethodEle.getAttribute(NAME_ATTRIBUTE);
                //提取对应的新的替换方法
　　　　　　　　　 String callback = replacedMethodEle.getAttribute(REPLACER_ATTRIBUTE);
                ReplaceOverride replaceOverride = new ReplaceOverride(name, callback);
                // Look for arg-type match elements.
                List<Element> argTypeEles = DomUtils.getChildElementsByTagName(replacedMethodEle, ARG_TYPE_ELEMENT);
                //记录参数
　　　　　　　　　 for (Element argTypeEle : argTypeEles) {
　　　　　　　　　　　　String match = argTypeEle.getAttribute(ARG_TYPE_MATCH_ATTRIBUTE);
                    match = (StringUtils.hasText(match) ? match : DomUtils.getTextValue(argTypeEle));
                    if (StringUtils.hasText(match)) {
                        replaceOverride.addTypeIdentifier(match);
                    }
                }
                replaceOverride.setSource(extractSource(replacedMethodEle));
                overrides.addOverride(replaceOverride);
            }
        }
    }

public class LookupMethodBean {
    public void test(){
        System.out.println("原始方法!");
    }
}

public class MethodReplace implements MethodReplacer {
    public Object reimplement(Object obj, Method method, Object[] args) throws Throwable {
        System.out.println("方法已经被替换!");
        return null;
    }
}

<bean name="replacer" class="MethodReplace"> </bean> 
<bean name="testBean" class="LookupMethodBean">
　　<replaced-method name="test" replacer="replacer"> </replaced-method > 
</bean>