我试图使用建议，并将这些注释放在zkoss控制器中，但是即使使用这些代码，spring服务也没有初始化，并且我得到了NullPointer。我的代码。
@VariableResolver(org.zkoss.zkplus.spring.DelegatingVariableResolver.class) public class UserNotesListController extends SelectorComposer<Component> { private static final long serialVersionUID = 1L; private static final Logger log = LoggerFactory.getLogger(UserNotesListController.class); @WireVariable private UserService userService; @WireVariable private NoteService noteService; private ListModel<Note> notesListModel; @Wire private Window window; public UserNotesListController() { notesListModel = new ListModelList<>(noteService.listNotes()); ((ListModelList<Note>) notesListModel).setMultiple(true); log.info("Конструктор класса {} успешно создан", UserNotesListController.class.getSimpleName()); } public ListModel<Note> getNotesListModel() { return notesListModel; } @Listen("onSelect = notesListBox") public void updateRow() { Set<Note> selectedNotes = ((ListModelList<Note>) notesListModel).getSelection(); int size = selectedNotes.size(); showNotify(size > 0 ? size + " notes selected: " + selectedNotes : "no notes selected", window); } private void showNotify(String message, Component reference) { Clients.showNotification(message, "Info", reference, "top_right", 2000, true); }
}
java.lang.NullPointerException ru.mightynoobs.springhibernate.controller.UserNotesListController.<init>(UserNotesListController.java:44) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) java.lang.reflect.Constructor.newInstance(Constructor.java:423) java.lang.Class.newInstance(Class.java:442) org.zkoss.zk.ui.impl.AbstractUiFactory.newComposer(AbstractUiFactory.java:130) org.zkoss.zk.ui.impl.AbstractUiFactory.newComposer(AbstractUiFactory.java:142) org.zkoss.zk.ui.impl.Utils.newComposer(Utils.java:90) org.zkoss.zk.ui.metainfo.ComponentInfo.toComposer(ComponentInfo.java:355) org.zkoss.zk.ui.metainfo.ComponentInfo.toComposers(ComponentInfo.java:323) org.zkoss.zk.ui.metainfo.ComponentInfo.resolveComposer(ComponentInfo.java:310) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:834) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:826) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:735) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:797) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:757) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:699) org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:442) org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:356) org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:217) org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:136) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:152) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
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<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="ru.mightynoobs.springhibernate"/> <!--Database information--> <bean id="originalDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/mightynoobsdb"/> <property name="username" value="root"/> <property name="password" value="admin"/> </bean> <!--for log4JDBC--> <bean id="dataSource" class="net.sf.log4jdbc.Log4jdbcProxyDataSource" > <constructor-arg ref="originalDataSource" /> <property name="logFormatter"> <bean class="net.sf.log4jdbc.tools.Log4JdbcCustomFormatter" > <property name="loggingType" value="SINGLE_LINE" /> <!--<property name="margin" value="19" />--> <!-- на этой строчке Spring выдает ошибку - не может прочитать значение value --> <property name="sqlPrefix" value="SQL:::" /> </bean> </property> </bean> <!--Hibernate 4 SessionFactory Bean definition--> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="annotatedClasses"> <list> <value>ru.mightynoobs.springhibernate.model.user.User</value> <value>ru.mightynoobs.springhibernate.model.user.Role</value> <value>ru.mightynoobs.springhibernate.model.note.NoteState</value> <value>ru.mightynoobs.springhibernate.model.note.NoteType</value> <value>ru.mightynoobs.springhibernate.model.note.Note</value> </list> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.connection.url">jdbc:mysql://localhost:3306/mightynoobsdb</prop> <prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driver</prop> </props> </property> </bean> <!--UserDao and UserService beans--> <bean id="userDao" class="ru.mightynoobs.springhibernate.dao.user.UserDaoImpl"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <bean id="userService" class="ru.mightynoobs.springhibernate.service.user.UserServiceImpl"> <property name="userDao" ref="userDao"/> </bean> <!--NoteDao and NoteService beans--> <bean id="noteDao" class="ru.mightynoobs.springhibernate.dao.note.NoteDaoImpl"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <bean id="noteService" class="ru.mightynoobs.springhibernate.service.note.NoteServiceImpl"> <property name="noteDao" ref="noteDao"/> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <tx:annotation-driven transaction-manager="transactionManager"/>
当我做这样的事情：
private UserService userService = (UserService) SpringUtil.getBean("userService")
很容易。有什么建议吗？
我们使用普通的@Inject批注，但是我们需要对此AbstractVM进行扩展才能使其正常工作：
public abstract class AbstractVM { public AbstractVM() { this.autowire(this); } protected final void autowire(Object object) { this.getApplicationContext().getAutowireCapableBeanFactory() .autowireBean(object); this.getApplicationContext().getAutowireCapableBeanFactory() .initializeBean(object, null); } /** * Gets the application context. * * @return the application context */ protected final ApplicationContext getApplicationContext() { return WebApplicationContextUtils .getRequiredWebApplicationContext(Executions.getCurrent() .getDesktop().getWebApp().getServletContext()); } }
所以是vm的示例：
import javax.inject.Inject; public class OverviewVM extends AbstractVM { @Inject private NotaService notaService; @Inject private ContactService contactService;
@Dunni的评论是正确的。 您不能在构造函数中使用自动装配的Bean。我以前的解决方案是MVVM，但是对于MVC，您需要将该代码放置在doBeforeCompose或doAfterCompose方法中而不是在构造函数中。（从中覆盖SelectorComposer）
doBeforeCompose
doAfterCompose
SelectorComposer
