使用jpa集成hibernate查询问题!


业务类方法
@SuppressWarnings("unchecked")
@Transactional(readOnly = true, propagation = Propagation.NOT_SUPPORTED)
public <T> QueryResult<T> getScrollData(Class<T> entityClass,
int firstIndex, int maxResult) {
QueryResult <T> result = new QueryResult<T>();
String entityName = getEntityName(entityClass);
Query query = entityManager.createNamedQuery("select t from "+entityName+" t");
query.setFirstResult(firstIndex).setMaxResults(maxResult);
result.setResultlist(query.getResultList());
query.setMaxResults(maxResult);
query = entityManager.createQuery("select count(t) from "+entityName+" t");
result.setTotalrecord((Long)query.getSingleResult());
return result;
｝
/**
 * 获取实体类的名称
 * @param <T>
 * @param entityClass 实体类
 * @return
 */
protected <T> String getEntityName(Class<T> entityClass) {
/** 获得类的简 称 **/
String entityName = entityClass.getSimpleName();
/** 获取实体类中为Entity的注释 **/
Entity entity = entityClass.getAnnotation(Entity.class);
/** 判断实体类中Entity的注释是否为空 **/
if (entity.name() != null && !"".equals(entity.name())) {
entityName = entity.name();
}
return entityName;
}
单元测试类
public class BillinginfoTest {

private static BeanFactory beanFactory ;
private static IBillinginfoService billinginfoService; @BeforeClass
public static void setUpBeforeClass() throws Exception {
beanFactory = new ClassPathXmlApplicationContext("applicationContext.xml");
billinginfoService = (IBillinginfoService) beanFactory.getBean("billinginfoServiceBean");
} @Test
public void findPageAll(){
QueryResult <Billinginfo> result = billinginfoService.getScrollData(Billinginfo.class, 0, 10);
List <Billinginfo> list = result.getResultlist();
for(Billinginfo bi : list){
System.out.print(bi.getMobile());
}
}
}
异常
java.lang.IllegalArgumentException: Named query not found: select t from Billinginfo t
at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:108)
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.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:365)
at $Proxy17.createNamedQuery(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
at $Proxy17.createNamedQuery(Unknown Source)
at com.ssj.service.base.DaoSupport.getScrollData(DaoSupport.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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:108)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy18.getScrollData(Unknown Source)
at test.BillinginfoTest.findPageAll(BillinginfoTest.java:38)
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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:73)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:46)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
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)我测试添加神马的都没问题 使用jpa集成hibernate做的，查询出了这样的错。
java.lang.IllegalArgumentException: Named query not found: select t from Billinginfo t