Spring的replace-method标签

    public voidparseReplacedMethodSubElements(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 = newReplaceOverride(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 classLookupMethodBean {
    public voidtest(){
        System.out.println("原始方法!");
    }
}
public class MethodReplace implementsMethodReplacer {
    public Object reimplement(Object obj, Method method, Object[] args) throwsThrowable {
        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>