为什么在这种豆中使用NPE？
|
我有一个会话bean：
<managed-bean>
<managed-bean-name>mainMenuNavigationBean</managed-bean-name>
<managed-bean-class>com.cloud.common.jsf.core.beans.MainMenuNavigationBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<managed-bean>
<managed-bean-name>createAccountBean</managed-bean-name>
<managed-bean-class>com.cloud.common.jsf.account.CreateAccountBean</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
<managed-property>
<property-name>mainMenuNavigationBean</property-name>
<property-class>com.cloud.common.jsf.core.beans.MainMenuNavigationBean</property-class>
<value>#{mainMenuNavigationBean}</value>
</managed-property>
</managed-bean>
@PostConstruct
public void init() {
userLoginVo = new UserLoginVo();
//NPE here
mainMenuNavigationBean.setExternalPage(true);
}
没有找到相关结果
已邀请:
1 个回复
浆错
public class MainMenuNavigationBean { public MainMenuNavigationBean() { // Can even be omitted altogether if you don\'t have other constructors. } // ... }public class CreateAccountBean { private MainMenuNavigationBean mainMenuNavigationBean; public void setMainMenuNavigationBean(MainMenuNavigationBean mainMenuNavigationBean) { this.mainMenuNavigationBean = mainMenuNavigationBean; } // ... }，如果忽略该设置，则设置器无效。