org.springframework.beans.NotWritablePropertyException,请高人指点...

 

xml配置文件中：<bean id="userManager" class="com.bjtu.usermag.manager.LogManagerImpl">   <property name="sessionFactory" ref="sessionFactory"/>   <property name="logManager" ref="logManager"/>   </bean>      <bean id="logManager" class="com.bjtu.usermag.manager.LogManagerImpl">   <property name="sessionFactory" ref="sessionFactory"/>   </bean>UserManagerImpl为：public class UserManagerImpl extends HibernateDaoSupport implements UserManager {private LogManager logManager=null;public void setLogManager(LogManager logManager) {this.logManager = logManager;}public LogManager getLogManager() {return logManager;}public void addUser(User user) {this.getHibernateTemplate().save(user);//保存日志Log log=new Log();log.setType("安全日志");log.setDetail("***,进入系统");log.setTime(new Date());logManager.addLog(log);}运行的时候，老是提示org.springframework.beans.NotWritablePropertyException错误，我查了一下，这个问题主要原因是setter方法名称和成员变量名不匹配引起的，但是我的我检查不存在这样的错误啊，在线求高人指点.....