我在运行测试时遇到此异常(我试图在spring中配置aop):
java.lang.ClassCastException: $Proxy25 cannot be cast to path.UserDao
at com.playence.app.daoTests.TestCreateOntologyDB.testGenerateGlobalAnnotation(TestCreateOntologyDB.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
UserDao.java
public class UserDao extends AbstractHibernateDAOSupport {
public UserDao() {
super();
}
/**
* Insert a new User into the database.
*
* @param user
*/
public void store(User user) throws DataAccessLayerException {
super.save(user);
}
/**
* Delete a User from the database.
*
* @param user
*/
public void delete(User user) throws DataAccessLayerException {
super.delete(user);
}
/**
* Updates the state of a detached User.
*
* @param user
*/
public void update(User user) throws DataAccessLayerException {
super.update(user);
}
public User findByID(String id) throws DataAccessLayerException {
return (User) this.find(User.class, id);
}
/**
* Finds all Users in the database.
*
* @return
*/
public List findAll() throws DataAccessLayerException {
return super.findAll(User.class);
}
Spring配置文件: applicationContext-dao.xml
<bean id="userDao" class="path.UserDao">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
TestCreateOntologyDB.java
....
ApplicationContext ctx ;
public TestCreateOntologyDB() {
ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");
}
@Test
public void testGenerateGlobalAnnotation(){
UserDao userDao = (UserDao)ctx.getBean("userDao");
...
我还没有在任何其他配置文件中设置任何UserDao附加属性。可能是什么错误?任何帮助,将不胜感激。提前致谢
答案 0 :(得分:1)
最后我找到了溶剂:
在spring配置文件中编辑正确的路径:
在同一配置文件中添加此行。请注意,在我的情况下,它将影响所有bean,但它可以包含在一个bean中。
答案 1 :(得分:1)
如果您使用的是基于Java的配置,则需要在Configuration类上添加@EnableAspectJAutoProxy注释,并将proxyTargetClass设置为true。
@Configuration
@ImportResource("classpath:beanConfiguration.xml")
@ComponentScan(basePackages="com.bpjoshi.foo")
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class NotificationConfig {
}
有关详细说明,请访问this official spring documentation
如果您使用spring的xml配置,请将以下代码添加到您的bean-config.xml
<aop:aspectj-autoproxy proxy-target-class="true"/>
答案 2 :(得分:0)
看起来,你正在使用Spring AOP Proxy并尝试将一些应该是UserDao的内容转换为UserDao,但由于代理内容,它不是UserDao。
有关详细信息,请发布导致错误的代码:
com.playence.app.daoTests.TestCreateOntologyDB.testGenerateGlobalAnnotation(TestCreateOntologyDB.java:49)
奇怪的是,您是否尝试过AbstractApplicationContext.getBean(String name, Class<T> requiredType)
而不是显式演员?
以我的拙见:我强烈建议使用AspectJ
答案 3 :(得分:0)
您需要启用目标类代理才能正常工作。将属性proxyTargetClass设置为true以使其工作或创建PersonDao接口,将您的dao重命名为PersonDaoImpl并让您的类使用接口而不是类。