jpa org.springframework.aop.AopInvocationException:通知中的空返回值与以下项的基本返回类型不匹配：公共抽象字符

vojdkbi0 于 2023-10-19 发布在 Spring

关注(0)|答案(2)|浏览(105)

我有一个用列char定义的表，我定义了一个查询来返回该列。现在，当db表中的数据对于特定条件为null时，它会给我错误：

org.springframework.aop.AopInvocationException: Null return value from 
advice does not match primitive return type for: public abstract char

下面是代码片段：

import org.springframework.data.jpa.repository.JpaRepository;
    import org.springframework.data.jpa.repository.Query;
    import org.springframework.data.repository.query.Param;

    import com.marriott.sup.beans.StepWorkflow;

    public interface flowRepo extends JpaRepository<StepWorkflow, Long> {

        @Query(
                value = "SELECT s.status FROM flow s WHERE s.XREFID 
     = :xrefId order by "
                + "s.Datestarted desc limit 1",
                nativeQuery = true)
        public char findLatestSts(@Param("xrefId") Long xrefId);

    }

    public class flowService {

        public static char INPROGRESS = 'P';
        public static char SUCCESS = 'S';
        public static char ERROR = 'E';
        public static char NOTSTARTED = 'N';

        @Autowired
        private flowRepo Fl;

        /*some basic code in between and then i am trying to call the 
      function 
      defined in repo and assign it to a character variable
    */

    Sts = Fl.findLatestSts(xrefId);
    }

我需要它不抛出错误，而是在null情况下分配一些默认值。需要帮助来解决这个问题，我如何处理这个问题。

org.springframework.aop.AopInvocationException: Null return value from advice does not match primitive return type for: public abstract char org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:226) at com.sun.proxy.$Proxy108.findLatestSts(Unknown Source) at com.marriott.sup.service.StepWorkflowService.getserverStepstatus(StepWorkflowService.java:79) at com.marriott.sup.web.SampleRestController.getServerStepStatus(SampleRestController.java:91) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)

jpa

来源：https://stackoverflow.com/questions/56497893/org-springframework-aop-aopinvocationexception-null-return-value-from-advice-do

2条答案

按热度按时间

2ledvvac1#

使用Character代替char。当你的查询返回NULL时，你知道Java中的基本类型不能保存空值。所以，使用像int -> Integer, float -> Float, char -> Character这样的类型的Object。
或者，如果你真的需要使用原语，把你的方法放在try-catch块中，来处理这个问题。

赞(0）回复(0）举报 2023-10-19

yruzcnhs2#

确保你使用了正确的仓库名称，在我的例子中，我需要通过电子邮件获取用户：
错误：