Java JPA标准：将int转换为String，然后从结果字符串的子字符串中选择

我有一个字符串作为参数（实际上是一个（整数）的值），并希望将其与DB中int值的子字符串进行比较。以下是我的代码：

ClinicPatients clp = null;

// Get the criteria builder instance from entity manager
final CriteriaBuilder cb = getEntityManager().getCriteriaBuilder();     
// Create criteria query and pass the value object which needs to be populated as result
CriteriaQuery<ClinicPatients> criteriaQuery = cb.createQuery(ClinicPatients.class);     
// Tell to criteria query which tables/entities you want to fetch
final Root<ClinicPatients> rootClp = criteriaQuery.from(ClinicPatients.class);

criteriaQuery.select(rootClp);

Expression<String> e1 = cb.function("CONVERT", String.class, rootClp.get(idCPFieldName));

Predicate p1 = cb.equal(cb.substring(e1, 1, 3), idClinicPatient);
criteriaList.add(p1);

criteriaQuery.where(p1);

// Here entity manager will create actual SQL query out of criteria query
final TypedQuery<ClinicPatients> query = getEntityManager().createQuery(criteriaQuery);

List<ClinicPatients> lClps = (List<ClinicPatients>) query.getResultList();
if(lClps.size() > 0)
    clp = lClps.get(0);

return clp;

clp=null；
//从实体管理器获取criteria builder实例
最终CriteriaBuilder cb=getEntityManager（）.getCriteriaBuilder（）；
//创建条件查询并传递需要作为结果填充的值对象
CriteriaQuery-CriteriaQuery=cb.createQuery（ClinicPatients.class）；
//告诉查询条件要获取哪些表/实体
最终根rootClp=criteriaQuery.from（ClinicPatients.class）；
criteriaQuery.select（rootClp）；
表达式e1=cb.function（“CONVERT”，String.class，rootClp.get（idCPFieldName））；
谓词p1=cb.equal（cb.substring（e1，1，3），IDP）；
标准列表。添加（p1）；
criteriaQuery.where（p1）；
//在这里，实体管理器将根据查询条件创建实际的SQL查询
final TypedQuery query=getEntityManager（）.createQuery（criteriaQuery）；
List lClps=（List）query.getResultList（）；
如果（lClps.size（）>0）
clp=lClps.get（0）；
返回中电；

我得到了一个错误，我猜测转换为字符串的过程从未完成，然后Hibernate尝试将一些奇怪的值替换为子字符串，但我不确定这一点。 这是我得到的线索：

> DEBUG could not extract ResultSet [n/a] com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an
> error in your SQL syntax; check the manual that corresponds to your
> MySQL server version for the right syntax to use near '), 1, 3)='005''
> at line 1     at
> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>   at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>   at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>   at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>   at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)     at
> com.mysql.jdbc.Util.getInstance(Util.java:386)    at
> com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)    at
> com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4190)    at
> com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4122)    at
> com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)     at
> com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)  at
> com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2818)   at
> com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2157)
>   at
> com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2324)
>   at
> org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:80)
>   at org.hibernate.loader.Loader.getResultSet(Loader.java:2065)   at
> org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1862)
>   at
> org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838)
>   at org.hibernate.loader.Loader.doQuery(Loader.java:909)     at
> org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
>   at org.hibernate.loader.Loader.doList(Loader.java:2553)     at
> org.hibernate.loader.Loader.doList(Loader.java:2539)  at
> org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369)    at
> org.hibernate.loader.Loader.list(Loader.java:2364)    at
> org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496)   at
> org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387)
>   at
> org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231)
>   at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264)   at
> org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)     at
> org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573)     at
> org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449)
>   at
> org.hibernate.jpa.criteria.compile.CriteriaQueryTypeQueryAdapter.getResultList(CriteriaQueryTypeQueryAdapter.java:67)
>   at
> ca.chronometriq.commons.cmqfacade.ClinicPatientsFacade.findByIDClinicPatientFirstThreeDigitsVerificationNumber(ClinicPatientsFacade.java:150)
>   at
> ca.chronometriq.commons.cmqfacade.ClinicPatientsFacade$$FastClassByCGLIB$$7cc86440.invoke(<generated>)
>   at
> org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
>   at
> org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
>   at
> org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
>   at
> org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
>   at
> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
>   at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
>   at
> org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
>   at
> ca.chronometriq.commons.cmqfacade.ClinicPatientsFacade$$EnhancerByCGLIB$$8afa98d9.findByIDClinicPatientFirstThreeDigitsVerificationNumber(<generated>)    at
> ca.chronometriq.webterm.restapi.AdminModule.findByThreeDig(AdminModule.java:1474)
>   at
> ca.chronometriq.webterm.restapi.AdminModule$$FastClassByCGLIB$$2e650668.invoke(<generated>)
>   at
> org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
>   at
> org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:627)
>   at
> ca.chronometriq.webterm.restapi.AdminModule$$EnhancerByCGLIB$$e2195e01.findByThreeDig(<generated>)
>   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
> com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
>   at
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
>   at
> com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
>   at
> com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
>   at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>   at
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
>   at
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>   at
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
>   at
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
>   at
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
>   at
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
>   at
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
>   at
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
>   at
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
>   at
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699)
>   at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)     at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>   at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>   at
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>   at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
>   at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>   at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
>   at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
>   at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:611)
>   at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
>   at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
>   at
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
>   at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
>   at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:409)
>   at
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1044)
>   at
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
>   at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1721)
>   at
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
>   at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>   at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>   at java.lang.Thread.run(Thread.java:744)

>调试无法提取结果集[n/a]com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:您有一个
>SQL语法错误；请检查与您的SQL语法对应的手册
>MySQL服务器版本的正确语法使用接近'，1，3）='005''
>在第1行
>sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
>在
>sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57）
>在
>sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）
>位于java.lang.reflect.Constructor.newInstance（Constructor.java:526）
>位于com.mysql.jdbc.Util.handleNewInstance（Util.java:411）
>com.mysql.jdbc.Util.getInstance（Util.java:386）位于
>com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1054）位于
>com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:4190）位于
>com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:4122）位于
>com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:2570）位于
>com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2731）位于
>com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2818）位于
>com.mysql.jdbc.PreparedStatement.executeInternal（PreparedStatement.java:2157）
>在
>com.mysql.jdbc.PreparedStatement.executeQuery（PreparedStatement.java:2324）
>在
>org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract（ResultSetReturnImpl.java:80）
>位于org.hibernate.loader.loader.getResultSet（loader.java:2065）
>org.hibernate.loader.loader.executeQueryStatement（loader.java:1862）
>在
>org.hibernate.loader.loader.executeQueryStatement（loader.java:1838）
>位于org.hibernate.loader.loader.doQuery（loader.java:909）
>org.hibernate.loader.loader.doQueryAndInitializeNonLazyCollections（loader.java:354）
>位于org.hibernate.loader.loader.doList（loader.java:2553）
>org.hibernate.loader.loader.doList（loader.java:2539）位于
>org.hibernate.loader.loader.listIgnoreQueryCache（loader.java:2369）位于
>org.hibernate.loader.loader.list（loader.java:2364）位于
>org.hibernate.loader.hql.QueryLoader.list（QueryLoader.java:496）位于
>org.hibernate.hql.internal.ast.QueryTranslatorImpl.list（QueryTranslatorImpl.java:387）
>在
>org.hibernate.engine.query.spi.HQLQueryPlan.performList（HQLQueryPlan.java:231）
>位于org.hibernate.internal.SessionImpl.list（SessionImpl.java:1264）
>org.hibernate.internal.QueryImpl.list（QueryImpl.java:103）位于
>org.hibernate.jpa.internal.QueryImpl.list（QueryImpl.java:573）位于
>org.hibernate.jpa.internal.QueryImpl.getResultList（QueryImpl.java:449）
>在
>org.hibernate.jpa.criteria.compile.CriteriaQueryTypeQueryAdapter.getResultList（CriteriaQueryTypeQueryAdapter.java:67）
>在
>ca.chronometriq.commons.cmqfacade.ClinicPatientsFacade.findByIDClinicPatientFirstThreeDigitsVerificationNumber（ClinicPatientsFacade.java:150）
>在
>ca.chronometriq.commons.cmqfacade.ClinicPatientsFacade$$FastClassByCGLIB$$7cc86440.invoke（）
>在
>org.springframework.cglib.proxy.MethodProxy.invoke（MethodProxy.java:204）
>在
>org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint（CglibAopProxy.java:698）
>在
>org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:150）
>在
>org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation（TransactionInterceptor.java:96）
>在
>org.springframework.transaction.interceptor.TransactionSpectSupport.invokeWithinTransaction（TransactionSpectSupport.java:260）
>在
>org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:94）
>在
>org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:172）
>在
>org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept（CglibAopProxy.java:631）
>在
>ca.chronometriq.commons.cmqfacade.ClinicalPatientsFacade$$EnhancerByGlib$$8afa98d9.FindByidClinicaPatientFirstThreeDigitsVerificationNumber（）位于
>ca.chronometriq.webterm.restapi.AdminModule.findByThreeDig（AdminModule.java:1474）
>在
>ca.chronometriq.webterm.restapi.AdminModule$$FastClassByCGLIB$$2e650668.invoke（）
>在
>org.springframework.cglib.proxy.MethodProxy.invoke（MethodProxy.java:204）
>在
>org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept（CglibAopProxy.java:627）
>在
>ca.chronometriq.webterm.restapi.AdminModule$$enhancerbyglib$$e2195e01.findByThreeDig（）
>位于的sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）
>太阳反射
Predicate p1 = cb.like(cb.substring(e1, 1, 3), idClinicPatient);

select * from TABLE WHERE SUBSTR( ID_INT_COL, 0, 1 ) = '1'

Expression<String> e1 = rootClp.get(idCPFieldName).as(String.class);