Spring 字段自动关联失败,异常
我正在使用SpringMVCPortlet,我遇到了一个问题。我的应用程序在有一个bean时工作正常。如果我想在下面添加另一个bean,则会发生错误 错误日志在这里Spring 字段自动关联失败,异常,spring,hibernate,model-view-controller,javabeans,portlet,Spring,Hibernate,Model View Controller,Javabeans,Portlet,我正在使用SpringMVCPortlet,我遇到了一个问题。我的应用程序在有一个bean时工作正常。如果我想在下面添加另一个bean,则会发生错误 错误日志在这里 ERROR [org.springframework.web.portlet.DispatcherPortlet] - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean
ERROR [org.springframework.web.portlet.DispatcherPortlet] - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'addSinifController': Autowiring of fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.project.service.SinifService com.project.controller.AddSinifController.sinifService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mySinifService' defined in file [/tmp/1-sample_BookCatalog/WEB-INF/classes/com/project/service/SinifService.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessAfterInstantiation(AutowiredAnnotationBeanPostProcessor.java:280)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1011)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:289)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:286)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:188)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:543)
at
...
我的应用程序-context.xml
<context:annotation-config/>
<context:component-scan base-package="sample.code.listing" />
<context:component-scan base-package="com.project.controller" />
<context:component-scan base-package="com.project.domain" />
<context:component-scan base-package="com.project.service" />
<bean
class="org.springframework.web.portlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="webBindingInitializer">
<bean
class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
<property name="propertyEditorRegistrars">
<list>
<ref bean="myPropertyEditorRegistrar" />
</list>
</property>
</bean>
</property>
</bean>
<bean id="myPropertyEditorRegistrar" class="sample.code.listing.utils.MyPropertyEditorRegistrar"/>
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames">
<list>
<value>content.Language-ext</value>
</list>
</property>
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
content.Language-ext
我的AddSinifController在这里:
@Controller(value="addSinifController")
@RequestMapping(value="VIEW")
@SessionAttributes(types=Sinif.class)
public class AddSinifController {
@Autowired
@Qualifier("mySinifService")
private SinifService sinifService;
public SinifService getSinifService() {
return sinifService;
}
public void setSinifService(SinifService sinifService) {
this.sinifService = sinifService;
}
private Logger logger = Logger.getLogger(AddSinifController.class);
@RenderMapping(params = "myaction=addsinif")
public String showAddSinifForm(RenderResponse response,ModelMap model){
return "addSinifForm";
}
@RenderMapping(params = "myaction=home")
public String showhome(RenderResponse response,ModelMap model) {
return "home";
}
@InitBinder
public void initBinder(WebDataBinder binder) {
binder.registerCustomEditor(Long.class, new LongNumberEditor());
}
@ModelAttribute("sinif")
public Sinif getCommandObject(){
return new Sinif("sinif");
}
@ModelAttribute(value = "myaction=siniflar")
public List<Sinif> getCommandObject2(){
return sinifService.getSiniflar();
}
@ActionMapping(params="myaction=addSinif")
public void addSinif(@ModelAttribute Sinif sinif,
BindingResult bindingResult, ActionResponse response,
SessionStatus sessionStatus){
Kademe kademe = new Kademe("kademe");
kademe.setId((long) 6);
sinif.setKademe(kademe);
}
sinifService.addSinif(sinif);
response.setRenderParameter("myaction", "addsinif");
sessionStatus.setComplete();
if(!bindingResult.hasErrors()){
System.out.println("hata yok");
sinifService.addSinif(sinif);
response.setRenderParameter("myaction", "addsinif");
sessionStatus.setComplete();
}else{
response.setRenderParameter("myaction", "home");
}
}
}
@Controller(value=“addSinifController”)
@请求映射(value=“VIEW”)
@SessionAttributes(类型=Sinif.class)
公共类AddSinifController{
@自动连线
@限定词(“mySinifService”)
私服;
公共SinifService getSinifService(){
返回sinifService;
}
公共无效设置SinifService(SinifService SinifService){
this.sinifService=sinifService;
}
专用记录器=Logger.getLogger(AddSinifController.class);
@渲染映射(params=“myaction=addsinif”)
公共字符串showAddSinifForm(RenderResponse响应,ModelMap模型){
返回“addSinifForm”;
}
@渲染映射(params=“myaction=home”)
公共字符串showhome(RenderResponse响应,ModelMap模型){
返回“家”;
}
@InitBinder
公共绑定器(WebDataBinder绑定器){
binder.registerCustomEditor(Long.class,新的LongNumberEditor());
}
@模型属性(“sinif”)
public Sinif getCommandObject(){
返回新的Sinif(“Sinif”);
}
@ModelAttribute(value=“myaction=siniflar”)
公共列表getCommandObject2(){
返回sinifService.getsiniferal();
}
@动作映射(params=“myaction=addSinif”)
public void addSinif(@modeldattribute Sinif Sinif,
BindingResult BindingResult,ActionResponse响应,
会话状态(SessionStatus){
Kademe Kademe=新Kademe(“Kademe”);
"长"6号,;
西尼夫·塞特卡德梅(卡德梅);
}
sinifService.addSinif(sinif);
响应。setRenderParameter(“myaction”、“addsinif”);
sessionStatus.setComplete();
如果(!bindingResult.hasErrors()){
System.out.println(“hata yok”);
sinifService.addSinif(sinif);
响应。setRenderParameter(“myaction”、“addsinif”);
sessionStatus.setComplete();
}否则{
响应。setRenderParameter(“myaction”、“home”);
}
}
}
关于给出相同的注释
@Qualifier("mySinifService")
要实例化的实现SinifService接口的类。基本上,这里的问题是,当您要求Spring在AddSinifController类中自动连接SinifService接口时,当您有多个类实现您的接口时,Spring不知道要实例化接口的哪个实现。通过给出@Qualifier注释,您指的是要实例化的特定bean。创建SinifService bean时出现问题,堆栈跟踪不包含原因。添加异常原因。问题不在XML中,而是在SinifService.java注释库配置中。您可以在此处发布
AddSinifController.java
吗?当您使用
时,您不需要使用
。您好,我添加了AddSinifController。将这一行添加到您的XML中: