如何在休眠状态下一次插入多条记录

Question

我希望使用hibernate

在循环中插入多个记录

我尝试使用以下代码

调用插入方法的服务方法

Map

DAO

@Override
    @Transactional
    public boolean addTermdates(FeeTermDates feetermdates) {
        // TODO Auto-generated method stub
        return theMasterDao.addTermdates(feetermdates);
    }

但是在抛出异常后它只插入一条记录。请查看异常

@Override
    public boolean addTermdates(FeeTermDates feetermdates) {

        int termid=feetermdates.getFeeTerms().getTermId();
        FeeTerms feeTerms=new FeeTerms();
        feeTerms.setTermId(termid);
         boolean success = false;
         try {
                currentSession=sessionFactory.getCurrentSession();

                String stringDate=feetermdates.getDate();
                FeeTermDates feeDate=null;
                String val[]=stringDate.split(",");
                int i=0;
                for(String date:val)
                {
                    i++;

                    feeDate=new FeeTermDates();
                    feeDate.setFeeTerms(feeTerms); 
                    feeDate.setDate(date);
                    currentSession.save(feeDate);    

                }  


                success=true;  

         }  
         catch (Exception e) {  
            e.printStackTrace();
        }
        return success;
    }    

＆GT;是否有可能在休眠状态下这样做？

如果是的话。请帮助我。

修改

org.hibernate.NonUniqueObjectException: A different object with the same identifier value was already associated with the session : [com.rasvek.cg.entity.FeeTermDates#0]
    at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:169)
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
    at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
    at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
    at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
    at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:691)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:683)
    at org.hibernate.internal.SessionImpl.save(SessionImpl.java:678)
    at com.rasvek.cms.dao.MasterDaoImpl.addTermdates(MasterDaoImpl.java:380)
    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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy1553.addTermdates(Unknown Source)
    at com.rasvek.cms.service.MasterSeviceImpl.addTermdates(MasterSeviceImpl.java:150)
    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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy1554.addTermdates(Unknown Source)
    at com.rasvek.cms.controller.MasterController.addTermdates(MasterController.java:600)
    at com.rasvek.cms.controller.MasterController$$FastClassBySpringCGLIB$$c2eff8c2.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673)
    at com.rasvek.cms.controller.MasterController$$EnhancerBySpringCGLIB$$8a38b6e5.addTermdates(<generated>)
    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:205)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
Hibernate: insert into campus_guru_01.fee_term_dates (date, term_id, tdm_id) values (?, ?, ?)

FeeTermDates.java

package com.rasvek.cg.entity;
// Generated May 14, 2018 11:39:07 PM by Hibernate Tools 5.1.7.Final

import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import com.fasterxml.jackson.annotation.JsonIgnore;

/**
 * FeeTerms generated by hbm2java
 */
@Entity
@Table(name = "fee_terms", catalog = "campus_guru_01")
public class FeeTerms implements java.io.Serializable {

    private Integer termId;
    private String termName;
    private String termCount;
    private Set<FeeTermDates> feeTermDateses = new HashSet<FeeTermDates>(0);
    private Set<AssocFeeTerms> assocFeeTermses = new HashSet<AssocFeeTerms>(0);

    public FeeTerms() {
    }

    public FeeTerms(String termName, String termCount, Set<FeeTermDates> feeTermDateses,
            Set<AssocFeeTerms> assocFeeTermses) {
        this.termName = termName;
        this.termCount = termCount;
        this.feeTermDateses = feeTermDateses;
        this.assocFeeTermses = assocFeeTermses;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)

    @Column(name = "term_id", unique = true, nullable = false)
    public Integer getTermId() {
        return this.termId;
    }

    public void setTermId(Integer termId) {
        this.termId = termId;
    }

    @Column(name = "term_name")
    public String getTermName() {
        return this.termName;
    }

    public void setTermName(String termName) {
        this.termName = termName;
    }

    @Column(name = "term_count", length = 45)
    public String getTermCount() {
        return this.termCount;
    }

    public void setTermCount(String termCount) {
        this.termCount = termCount;
    }  

    @OneToMany(fetch = FetchType.EAGER, mappedBy = "feeTerms")
    public Set<FeeTermDates> getFeeTermDateses() {
        return this.feeTermDateses;
    }  

    public void setFeeTermDateses(Set<FeeTermDates> feeTermDateses) {
        this.feeTermDateses = feeTermDateses;
    }

    @OneToMany(fetch = FetchType.EAGER, mappedBy = "feeTerms")
    public Set<AssocFeeTerms> getAssocFeeTermses() {
        return this.assocFeeTermses;
    }

    public void setAssocFeeTermses(Set<AssocFeeTerms> assocFeeTermses) {
        this.assocFeeTermses = assocFeeTermses;
    }

}

Answer 1

是的，这是可能的。

但基于堆栈跟踪的问题似乎表明，当您插入第二个FeeTermDates实体时，它将被分配相同的主键0。

如果要映射要手动分配的实体主键，如下所示，您正在循环中正确分配值。

@Id
private Integer id;

另一种选择是让数据库通过让数据库为您生成值来为您分配它，这样您就可以专注于构建具有业务数据的实体：

@Id
@GeneratedValue
private Integer id;

我的猜测是您使用选项（1），但您没有分配值。我的建议是尽可能使用选项（2）作为您的用例。