在spring boot中访问EntityManager时出错

我使用QueryDSL连接多个表（Person和PersonLine）并从这两个表中获取列。使用实体管理器时，出现错误。有谁能帮忙解决下面的问题吗

SearchPersonServiceImpl.java

package com.myc.cc.service.impl;
import static com.myc.cc.repository.SearchPersonPredicates.findPID;

@Service
public class SearchPersonServiceImpl extends AbstractService implements SearchPersonService {

@Autowired
private SearchPersonRepository personRepository;

@Transactional
@Override
public List<Person> findPnumber(Long id) { 
        Iterable<Person> person = personRepository
                .findAll(findPID(id));
        return constructList(person);
    }
}   

package com.myc.cc.service.impl；
导入静态com.myc.cc.repository.SearchPersonPredicates.findPID；
@服务
公共类SearchPersonService MPL扩展了AbstractService实现了SearchPersonService{
@自动连线
私有SearchPersonRepository personRepository；
@交易的
@凌驾
公共列表findPnumber（长id）{
Iterable person=personRepository
.findAll（findPID（id））；
退货清单（人）；
}
}   

SearchPersonPredicates.java

package com.myc.cc.repository;

public class SearchPersonPredicates {

@PersistenceContext
private static EntityManager entityManager;

public static Predicate findPID(final Long pId) { 
        QPerson qPerson = QPerson.person;
        BooleanBuilder booleanBuilder = new BooleanBuilder();
        if (pId != null) {
            booleanBuilder.and(qPerson.p_id.eq(pId));
        }
        Predicate predicate = booleanBuilder.getValue();
        JPAQuery jpaQuery = new JPAQuery(entityManager);        //Line : 83
        QPersonLine qPersonLine = QPersonLine.personLine; 
        jpaQuery.from(qPerson); 
        jpaQuery.join(qPersonLine);
        jpaQuery.on(qPerson.p_id.eq(qPersonLine.p_id));     
        jpaQuery.where(qPerson.p_id.eq(pId)); 
        List<Person> list = jpaQuery.list(qPerson);
        logger.info("List size of Persons :"+list.size());
        return predicate;
    }
}

package com.myc.cc.repository；
公共类searchPerson谓词{
@持久上下文
私有静态实体管理器实体管理器；
公共静态谓词findPID（最终长pId）{
QPerson QPerson=QPerson.person；
BooleanBuilder BooleanBuilder=新的BooleanBuilder（）；
如果（pId！=null）{
booleanBuilder.and（qPerson.p_id.eq（pId））；
}
谓词谓词=booleanBuilder.getValue（）；
JPAQuery=newjpaquery（entityManager）；//行：83
QPersonLine QPersonLine=QPersonLine.personLine；
来自（qPerson）的jpaQuery；
加入（qPersonLine）；
jpaQuery.on（qPerson.p_id.eq（qPersonLine.p_id））；
jpaQuery.where（qPerson.p_id.eq（pId））；
List List=jpaQuery.List（qPerson）；
logger.info（“人员列表大小：+List.size（））；
返回谓词；
}
}

错误：

ERROR 5116 --- [io-8080-exec-10] o.a.c.c.C.[.[.[.[dispatcherServlet]      : Servlet.service() for servlet [dispatcherServlet] in context with path [/new_dev] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

java.lang.NullPointerException: null
    at com.mysema.query.jpa.impl.JPAProvider.getTemplates(JPAProvider.java:66)
    at com.mysema.query.jpa.impl.JPAQuery.<init>(JPAQuery.java:44)
    at com.myc.cc.repository.SearchPersonPredicates.findPID(SearchPersonPredicates.java:83)
    at com.myc.cc.service.impl.SearchPersonServiceImpl.findPnumber(SearchPersonServiceImpl.java:62)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy114.findPnumber(Unknown Source)
    at com.myc.cc.web.SearchPersonController.searchPerson(SearchPersonController.java:133)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:291)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:105)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:102)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.boot.actuate.autoconfigure.MetricFilterAutoConfiguration$MetricsFilter.doFilterInternal(MetricFilterAutoConfiguration.java:90)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

错误5116---[io-8080-exec-10]o.a.c.c.c.[dispatcherServlet]：路径为[/new\u dev]的上下文中的Servlet[dispatcherServlet]的Servlet.service（）引发了异常[Request processing failed；嵌套异常是java.lang.NullPointerException]，其根本原因是
java.lang.NullPointerException:null
位于com.mysema.query.jpa.impl.JPAProvider.getTemplates（JPAProvider.java:66）
请访问com.mysema.query.jpa.impl.JPAQuery。（JPAQuery.java:44）
位于com.myc.cc.repository.SearchPersonPredicates.findPID（SearchPersonPredicates.java:83）
在com.myc.cc.service.impl.SearchPersonServiceImpl.findPnumber（SearchPersonServiceImpl.java:62）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）中
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:606）
位于org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection（AopUtils.java:317）
位于org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint（ReflectiveMethodInvocation.java:190）
在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:157）上
位于org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation（TransactionInterceptor.java:99）
位于org.springframework.transaction.interceptor.TransactionSpectSupport.invokeWithinTransaction（TransactionSpectSupport.java:281）
位于org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:96）
在org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:179）上
位于org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:207）
位于com.sun.proxy.$Proxy114.findPnumber（未知来源）
在com.myc.cc.web.SearchPersonController.searchPerson上（SearchPersonController.java:133）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）中
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:606）
位于org.springframework.web.method.support.InvocableHandlerMethod.doInvoke（InvocableHandlerMethod.java:221）
位于org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:137）
位于org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:110）
位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod（RequestMappingHandlerAdapter.java:776）
位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:705）
位于org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:85）
位于org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:959）
位于org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:893）
位于org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:966）
位于org.springframework.web.servlet.FrameworkServlet.doPost（FrameworkServlet.java:868）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:644）
位于org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:842）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:725）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:291）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）
位于org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:239）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）
位于org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationC
public static JPQLTemplates getTemplates(EntityManager em) {
    // detect by delegate
    for (Map.Entry<Class<?>, JPQLTemplates> entry : mappings.entrySet()) {
        if (entry.getKey().isAssignableFrom(em.getDelegate().getClass())) {     //Line : 66
            return entry.getValue();
        }
    }
    // detect by properties
    for (String key : em.getEntityManagerFactory().getProperties().keySet()) {
        key = key.toLowerCase();
        for (Map.Entry<String, JPQLTemplates> entry : templatesByName.entrySet()) {
            if (key.contains(entry.getKey())) {
                return entry.getValue();
            }
        }
    }
    return JPQLTemplates.DEFAULT;
}

@Repository
public class SearchPersonPredicates {