A类继承B类，B类中有方法重载，例如：

public void JsonSuccess(String Info) {

Map<String,Object> EchoMap = new HashMap<String,Object>();

EchoMap.put("status", 1);

EchoMap.put("info", Info);

renderJson(EchoMap);

}

public void JsonSuccess(String Info,Object Data) {

Map<String,Object> EchoMap = new HashMap<String,Object>();

EchoMap.put("status", 1);

EchoMap.put("info", Info);

EchoMap.put("data", Data);

renderJson(EchoMap);

}

则运行时报错can not be mapped, actionKey "/JsonSuccess" is already in use.