Java 接收org.hibernate.typemischException异常

我正在使用SpringMVC使用Spring开发一个应用程序，我遇到了以下错误，我不知道如何处理它

现在，我在控制台中看到以下消息：

org.hibernate.TypeMismatchException: Provided id of the wrong type. Expected: class java.lang.Integer, got class java.lang.String
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:86)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:795)
at org.hibernate.impl.SessionImpl.load(SessionImpl.java:788)
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.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
at com.sun.proxy.$Proxy11.load(Unknown Source)
at com.my.dao.DepartementImplDB.getDepartementByNom(DepartementImplDB.java:54)
at com.my.dao.DepartementImplDB.addDepartement(DepartementImplDB.java:29)
at com.my.service.DepartementImplMetier.create(DepartementImplMetier.java:57)
at com.my.controller.ImportController.Read(ImportController.java:279)
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.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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.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:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

这是我的ImportController类

/**
 * @author Ilias
 */
package com.my.controller;

//import ...

import com.my.dao.Departement;

@Controller
public class ImportController {


DepartementImplMetier dbD = new DepartementImplMetier();


@RequestMapping(value="/read")
public String Read(Model model,@RequestParam CommonsMultipartFile[] fileUpload) 
        throws IOException, EncryptedDocumentException, InvalidFormatException, java.text.ParseException
{


    liste = extraire(modelnom);

for(int m=0, i=29;i<liste.size();i=i+29){//i=i+29

     Employe employe= new Employe();
     Departement departement = new Departement();

    if(i % 29 == 0) m++;

    //...  Some code here

        String dep = (String)liste.get(29*m+13).toString();

        Departement d = new Departement();
        departement.setNomDepartement(dep);


        boolean bool=true;
        List<Departement> departements = dbD.getAll();


        boolean depbool = true;
        for(int j=0;j< departements.size();j++){
            if(departements.get(j).getNomDepartement() ==  dep )
            {
                depbool = false;
            }

            if(depbool){
            try {
                dbD.create(departement);
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }
        }

        for(int n=0;n<employes.size();n++){
            if(employes.get(n).getMatriculeMY() ==  (int)mat )
            {
                bool= false;
            }
        }
        if(bool){

        try {
            dbD.create(departement);
            dbE.create(employe);

        } catch (Throwable e) {
            e.printStackTrace();
        }

        }

    }
}
return "redirect";
}}
}

此部门为PLDB类

package com.my.dao;

import java.util.List;
import org.hibernate.Session;
import com.my.util.HibernateUtil;

/**
 * @author Ilias
 *
 */
public class DepartementImplDB implements DepartementDao {

    /**
     * @see com.my.dao.DepartementDao#addDepartement(com.my.dao.Departement)
     */
    @Override
    public int addDepartement(Departement D) {
        // TODO Auto-generated method stub

        Session session =  HibernateUtil.getInstance().getSessionFactory().getCurrentSession();
        session.beginTransaction();System.out.println("********");
        session.save(D);System.out.println("departement implement metier");
        session.getTransaction().commit();
        D=this.getDepartementByNom(D.getNomDepartement());
        return D.getId();
    }

    /**
     * @see com.my.dao.DepartementDao#getDepartementById(int)
     */
    @Override
    public Departement getDepartementById(int id) {
        // TODO Auto-generated method stub

        Session session =  HibernateUtil.getInstance().getSessionFactory().getCurrentSession();
        session.beginTransaction();
        Departement dept = (Departement) session.load(Departement.class, id);
        return dept;
    }

    /**
     * @see com.my.dao.DepartementDao#getDepartementByNom(java.lang.String)
     */
    @Override
    public Departement getDepartementByNom(String nomDepartement) {
        // TODO Auto-generated method stub
        Session session =  HibernateUtil.getInstance().getSessionFactory().getCurrentSession();
        session.beginTransaction();
        Departement dept = (Departement) session.load(Departement.class, nomDepartement);
        return dept;
    }

    /**
     * @see com.my.dao.DepartementDao#deleteDepartement(int)
     */
    @Override
    public void deleteDepartement(int id) {
        // TODO Auto-generated method stub
        Session session =  HibernateUtil.getInstance().getSessionFactory().getCurrentSession();
        session.beginTransaction();
        Departement dept = (Departement) session.load(Departement.class, id);
        session.delete(dept);
        session.getTransaction().commit();
    }

    /**
     * @see com.my.dao.DepartementDao#updateDepartement(com.my.dao.Departement)
     */
    @Override
    public void updateDepartement(Departement D) {
        // TODO Auto-generated method stub
    }

    /**
     * @see com.my.dao.DepartementDao#getAllDepartement()
     */
    @Override
    public List<Departement> getAllDepartement() {
        // TODO Auto-generated method stub

        Session session =  HibernateUtil.getInstance().getSessionFactory().getCurrentSession();
        session.beginTransaction();
        return session.createQuery("from Departement").list();          
    }
}

这是我上一个错误的链接，了解更多信息： 有人能帮忙吗？

例外：- 提供的id类型错误。应为：类java.lang.Integer，获得类java.lang.String

从上面的一行可以很清楚地看到，hibernate期望id是一个整数，但接收的id是字符串格式的。这就是投掷：- org.hibernate.TypeMismatchException

您的错误是

org.hibernate.TypeMismatchException: Provided id of the wrong type. Expected: class java.lang.Integer, got class java.lang.String

在stacktrace中，我们可以看到dbd.create调用其他方法

    at com.my.dao.DepartementImplDB.getDepartementByNom(DepartementImplDB.java:54)
at com.my.dao.DepartementImplDB.addDepartement(DepartementImplDB.java:29)

用你的方法

public Departement getDepartementByNom(String nomDepartement)

您试图用名称加载部门，但使用了session.load，而不是按Id加载

 Departement dept = (Departement) session.load(Departement.class, nomDepartement);

您必须发出条件请求才能按名称加载。像

session.beginTransaction();
Criteria criteria = session.createCriteria(Departement.class);
criteria.add(Restrictions.eq("nomDepartement", nomDepartement).ignoreCase());

 result = (Departement) criteria.uniqueResult();
 session.getTransaction().commit();

ps：在GetDepartmentById和GetDepartmentByNom中，您永远不会结束您的事务。请使用如下模式：

 try {
        session.beginTransaction();

        // your code

        session.getTransaction().commit();
    } catch (HibernateException e) {
        LOGGER.error(e);
        if (session.getTransaction().isActive()) {
            session.getTransaction().rollback();
        }
    }

---

你能把代码放在发生这种情况的地方吗？请把相关的代码也加到这个问题上。你的另一个问题是关于另一个问题的。@Tavo代码在另一个问题中？另一个问题是另一个问题。你不能指望人们在不同的页面上为你找到解决方案，因为你不必再费心把代码放在这里了。看在上帝的份上，为什么你的控制器中有这么多业务逻辑，为什么你已经有了spring，却要使用新的类名。另外，使用29、30等特定数字的循环的奇怪方式是不灵活的，也是不好的做法。我相信有更好的解决办法。另外，代码太多了，没有任何用处，因为你应该把相关的，而不仅仅是做一个转储，接下来你将做一个核心转储，并要求用户进行分析。这样不行，我的朋友。对于初学者，即使这个问题已经解决，我也建议使用Spring文档。是的，我理解它，但我没有发现问题在哪里粘贴hibernate的实体类，以及在接收此异常时执行的操作？检查department.hbm.xml、Employe.hbm.xml中的id类型，Department.java和Employee.javai更新了问题代码我添加了Department TIMPLDb现在我有另一条消息，我更新我的问题看起来您有多个同名的部门：org.hibernate.ununiqueresultException:查询未返回唯一结果：20。您可以使用criteria.list获得所有部门并获得第一个……或者只需检查为什么您有多个名称相同的部门（如果它应该是唯一的），当我调试代码时，它会给我一个infinite循环：我还认为您必须在添加部门之前检查是否存在名称相同的部门。

public Departement getDepartementByNom(String nomDepartement)

 Departement dept = (Departement) session.load(Departement.class, nomDepartement);

session.beginTransaction();
Criteria criteria = session.createCriteria(Departement.class);
criteria.add(Restrictions.eq("nomDepartement", nomDepartement).ignoreCase());

 result = (Departement) criteria.uniqueResult();
 session.getTransaction().commit();

 try {
        session.beginTransaction();

        // your code

        session.getTransaction().commit();
    } catch (HibernateException e) {
        LOGGER.error(e);
        if (session.getTransaction().isActive()) {
            session.getTransaction().rollback();
        }
    }