java.lang.UnsupportedOperationException：尚未實現SQL查詢

我使用SQL與Hibernate從我的數據庫表中獲取結果。結果應該是一個布爾值。java.lang.UnsupportedOperationException：尚未實現SQL查詢

這是我的方法，

public boolean isPatientExists(String usrename, Session session) { 
     String sql="SELECT 1 FROM Patient where user_name= :userName"; 
     SQLQuery query = session.createSQLQuery(sql); 
     query.setParameter("userName", usrename); 
     Type[] returnTypes = query.getReturnTypes(); 

     int result = Integer.parseInt(String.valueOf(returnTypes[0]));  
     if(result==1){ 
      return true; 
     }else{ 
      return false; 
     } 
}

我試圖從這種方法獲得布爾結果和上面是我的方法就可以了。

這是錯誤日誌，

java.lang.UnsupportedOperationException: not yet implemented for SQL queries 
    at org.hibernate.internal.SQLQueryImpl.getReturnTypes(SQLQueryImpl.java:241) 
    at dao.patient.PatientDAOImpl.isPatientExists(PatientDAOImpl.java:82) 
    at service.PatientService.isPatientExists(PatientService.java:205) 
    at rest.PatientJSONservice.isPatientExists(PatientJSONservice.java:93) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) 
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) 
    at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315) 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297) 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267) 
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) 
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) 
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) 
    at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:471) 
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425) 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383) 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336) 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745)

我不知道如何來處理這個異常。

有什麼想法嗎？

來源

2016-11-09 Barrier

createSQLQuery（）方法創建一個_native_ SQL查詢AFAIK。因此，你不能得到返回類型，因爲沒有Hibernate實體與這個查詢相關聯。 –

@TimBiegeleisen：那麼我能做些什麼呢？ – Barrier

看來您要確定您的Patient表是否包含某個用戶名。如果是這樣，那麼只需要執行下面的查詢，然後驗證結果集是否爲空：

public boolean isPatientExists(String usrename, Session session) { 
    String sql = "SELECT 1 FROM Patient where user_name = :userName"; 
    SQLQuery query = session.createSQLQuery(sql); 
    query.setParameter("userName", usrename); 

    return query.list().size() > 0; 
}

調用getReturnTypes()是不是基於我的理解這裏的路要走。使用Hibernate運行原始查詢時嘗試檢索實體類型是沒有意義的。

來源

2016-11-09 06:50:50

謝謝你和+1的回答。 – Barrier

java.lang.UnsupportedOperationException：尚未實現SQL查詢

回答

相關問題