将Spring bean注入JSF bean时发生代理异常 [英] Proxy Exception while injecting spring bean into JSF bean

问题描述

我正在尝试将Spring bean注入JSF bean，使用的是Spring 3.1和JSF 2(Mojarra 2.1.7)

I'm trying to inject spring bean into JSF bean, I'm using Spring 3.1 and JSF 2 (Mojarra 2.1.7)

无需多说，下面列出了我的配置和代码以及异常:

Without a lot of talking my configuration and code and exception listed in the following:

StudentService.java:

@Scope(proxyMode=ScopedProxyMode.TARGET_CLASS)
public class StudentsService extends AbstractMaqraaService {

    @Override
    public Set<Class<?>> getTypes() {
        // TODO Auto-generated method stub
        return null;
    }

    public Student registerStudent(Student student) {
        return this.store(student);
    }

}

StudentRegistrationMBean.java:

@ManagedBean(name="studentRegistrationMBean") 
@SessionScoped
public class StudentRegistrationMBean extends AbstractMBean {

    private Student student;
    @ManagedProperty (value="#{studentsService}")
    private StudentsService studentsService;

    public StudentRegistrationMBean() {
        this.student = new Student();
    }

    /*Setters and getters omitted here only*/

    public String register() {

        studentsService.registerStudent(student);
        return "manageStudents";
    }
}

模块上下文xml文件中的Spring bean:

<bean id="abstractMaqraaService" class="org.tts.maqraa.service.AbstractMaqraaService" abstract="true"/>

<bean id="studentsService" class="org.tts.maqraa.service.StudentsService" lazy-init="default" parent="abstractMaqraaService"/>

faces-config.xml:

...
<application>
        <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>
...

接收:

TRACE [http-bio-8080-exec-3] (SpringBeanELResolver.java:53) - Successfully resolved variable 'studentsService' in Spring BeanFactory
DEBUG [http-bio-8080-exec-3] (AbstractBeanFactory.java:245) - Returning cached instance of singleton bean 'studentsService'
نوار 13, 2012 11:10:45 ص com.sun.faces.application.view.FaceletViewHandlingStrategy handleRenderException
SEVERE: Error Rendering View[/teacher/registerNewStudent.xhtml]
com.sun.faces.mgbean.ManagedBeanCreationException: Unable to set property studentsService for managed bean studentRegistrationMBean
    at com.sun.faces.mgbean.ManagedBeanBuilder$BakedBeanProperty.set(ManagedBeanBuilder.java:615)
    at com.sun.faces.mgbean.ManagedBeanBuilder.buildBean(ManagedBeanBuilder.java:133)
    ...
    at java.lang.Thread.run(Unknown Source)
Caused by: javax.el.ELException: Cannot convert org.tts.maqraa.service.StudentsService@8f65bc0 of type class $Proxy10 to class org.tts.maqraa.service.StudentsService
    at org.apache.el.lang.ELSupport.coerceToType(ELSupport.java:420)
    at org.apache.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:47)
    at com.sun.faces.el.ELUtils.coerce(ELUtils.java:536)
    at com.sun.faces.mgbean.BeanBuilder$Expression.evaluate(BeanBuilder.java:592)
    at com.sun.faces.mgbean.ManagedBeanBuilder$BakedBeanProperty.set(ManagedBeanBuilder.java:606)
    ... 47 more

ERROR [http-bio-8080-exec-3] (MaqraaExceptionHandler.java:83) - Exception
javax.el.ELException: Cannot convert org.tts.maqraa.service.StudentsService@8f65bc0 of type class $Proxy10 to class org.tts.maqraa.service.StudentsService
    at org.apache.el.lang.ELSupport.coerceToType(ELSupport.java:420)
    ...
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

我在Google上进行了很多搜索，发现很多问题都与我的问题类似，但没有任何帮助，我希望我能为我的特例找到解决方案！

I made a lot of search in Google and found a lot of questions here had issues like mine but nothing helped me, I hope I'll find my solution for my special case !!

推荐答案

使用<aop:aspectj-autoproxy proxy-target-class="true"/>强制使用JDK代理而不是CGLIB

use <aop:aspectj-autoproxy proxy-target-class="true"/> to enforce use of JDK proxy rather than CGLIB

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