异常休眠插入语句答案

【问题标题】：Exception Hibernate insert statement异常休眠插入语句
【发布时间】：2013-12-31 06:15:09
【问题描述】：

我正在做一个小项目。这是整个项目的代码。代码中发生的情况是，当下拉框加载实体类中 ownerName 的值时，从下拉列表中选择任何成员时，应通过 jsp 页面上的输入框分配信用额度。所以没有为 ownerName 进行输入，而只是根据从下拉框中选择的 ownerName 设置信用额度。

这是实体文件：

@Entity
@Table(name = "accounts")
public class CyclosUsers {

    @Id
    @Column(name = "id")
    @GeneratedValue
    private int id;


    @Column(name = "owner_name")
    private String ownerName;

    @Column(name = "credit_limit")
    private float creditLimit;

    public CyclosUsers(){}

    public CyclosUsers(String ownerName, float creditLimit) 
    {
        super();
        //this.id = id;
        this.ownerName = ownerName;
        this.creditLimit = creditLimit;
    }

    public CyclosUsers(int id, String ownerName, float creditLimit) {
        super();
        this.id = id;
        this.ownerName = ownerName;
        this.creditLimit = creditLimit;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getOwnerName() {
        return ownerName;
    }

    public void setOwnerName(String ownerName) {
        this.ownerName = ownerName;
    }

    public float getCreditLimit() {
        return creditLimit;
    }

    public void setCreditLimit(float creditLimit) {
        this.creditLimit = creditLimit;
    }

}

这是 DAO 实现文件：

@Repository
public class CyclosUsersDaoImpl implements CyclosUsersDao {

    @Autowired
    private SessionFactory sessionFactory;

    @Override
    public void saveCyclosUsers(CyclosUsers cyclosUsers) {
        sessionFactory.getCurrentSession().createSQLQuery("INSERT INTO credit_limit WHERE" +" " +"WEB-INF.views.Register.ownerName.selectedItem("  +"ownerName");
    }

    @SuppressWarnings("unchecked")
    @Override
    public List<CyclosUsers> addToDropDown() {
        return sessionFactory.getCurrentSession().createSQLQuery("SELECT owner_name FROM accounts").list();
    }

    @SuppressWarnings("unchecked")
    @Override
    public List<CyclosUsers> CyclosUsersAndAccountDetails() {
        return sessionFactory.getCurrentSession().createCriteria(CyclosUsers.class).list();
    }

}

服务实现文件：

@Service
public class CyclosUsersServiceImpl implements CyclosUsersService {

    @Autowired
    private CyclosUsersDao cyclosUsersDao;

    @Override
    @Transactional
    public void saveCyclosUsers(CyclosUsers cyclosUsers) {
        cyclosUsersDao.saveCyclosUsers(cyclosUsers);
    }

    @Override
    @Transactional
    public List<CyclosUsers> addToDropDown() {
        return cyclosUsersDao.addToDropDown();
    }

    @Override
    @Transactional
    public List<CyclosUsers> CyclosUsersAndAccountDetails() {
        return cyclosUsersDao.CyclosUsersAndAccountDetails();
    }

}

这是控制器文件：

@Controller
public class CyclosUsersController {

    @Autowired
    private CyclosUsersService cyclosUsersService;

    @RequestMapping("/register")
    public ModelAndView displayOverdraftForm(@ModelAttribute("cyclosUsers") CyclosUsers cyclosUsers, BindingResult bindingResult)
    {
        Object addMembersListToDropdown = null;
        ArrayList<Object> membersListing = new ArrayList<>();
        membersListing.add(cyclosUsersService.addToDropDown());

        for(Object listingMembers : membersListing)
        {
            addMembersListToDropdown = listingMembers;
        }
        System.out.println(addMembersListToDropdown);
        return new ModelAndView("Register", "addMembersListToDropdown", addMembersListToDropdown);  
    }

    @RequestMapping("/saveCyclosUsers")
    public ModelAndView saveCyclosUsersCredentials(@ModelAttribute("cyclosUsers") CyclosUsers cyclosUsers, BindingResult bindingResult)
    {
        cyclosUsersService.saveCyclosUsers(cyclosUsers);
        System.out.println("Cyclos Users List:");
        return new ModelAndView("redirect:cyclosUsersList.html");   
    }

    @RequestMapping("/cyclosUsersList")
    public ModelAndView listCyclosUsersOverdraftDetails()
    {
        @SuppressWarnings("unused")
        CyclosUsers cyclosUsers = new CyclosUsers();
        Map<String, Object> model = new HashMap<String, Object>();
        model.put("cyclosUsers", cyclosUsersService.CyclosUsersAndAccountDetails());
        return new ModelAndView("cyclosUsersDetails", model);
    }   
}

这是 JSP 页面：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ include file = "includeFile.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Cyclos Users | Overdraft Form</title>
</head>
<body>
    <center>
        <br><br><br><br><br><br>
        <div style = "color:steal; font:30px">Cyclos Users | Overdraft Form</div>
        <c:url var = "overdraftGranting" value = "saveCyclosUsers.html"></c:url>
        <form:form id = "cyclosOverdraftGrantingForm" modelAttribute = "cyclosUsers" method = "post" action = "${overdraftGranting}">
            <table width = "400px" height = "150px">
                <tr>
                    <td><form:label path="ownerName" name = "ownerName">Select Overdraft User:</form:label></td>
                    <td><form:select path="ownerName" name = "ownerName" items = "${addMembersListToDropdown}"></form:select></td>
                </tr>
                <tr>
                    <td><form:label path="creditLimit">Enter an Amount:</form:label></td>
                    <td><form:input path="creditLimit"/></td>
                </tr>
                <tr><td></td><td><input type = "submit" value = "Grant Overdraft"></td></tr>
            </table>
        </form:form>
        <br>
        <a href = "cyclosUsersList.html">Click here to see Overdraft Details</a>
    </center>
</body>
</html>

这是编译后的错误日志：

message Request processing failed; nested exception is org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of nigeria.development.foundation.entity.CyclosUsers.creditLimit

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of nigeria.development.foundation.entity.CyclosUsers.creditLimit
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:659)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

root cause

org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type setter of nigeria.development.foundation.entity.CyclosUsers.creditLimit
    org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:83)
    org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:337)
    org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:200)
    org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3571)
    org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:133)
    org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:854)
    org.hibernate.loader.Loader.doQuery(Loader.java:729)
    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
    org.hibernate.loader.Loader.doList(Loader.java:2213)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
    org.hibernate.loader.Loader.list(Loader.java:2099)
    org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    nigeria.development.foundation.daoImpl.CyclosUsersDaoImpl.CyclosUsersAndAccountDetails(CyclosUsersDaoImpl.java:30)
    nigeria.development.foundation.serviceImpl.CyclosUsersServiceImpl.CyclosUsersAndAccountDetails(CyclosUsersServiceImpl.java:34)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:601)
    org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
    org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:108)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    com.sun.proxy.$Proxy16.CyclosUsersAndAccountDetails(Unknown Source)
    nigeria.development.foundation.controller.CyclosUsersController.listCyclosUsersOverdraftDetails(CyclosUsersController.java:50)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:601)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

root cause

java.lang.IllegalArgumentException: Can not set float field nigeria.development.foundation.entity.CyclosUsers.creditLimit to null value
    sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164)
    sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168)
    sun.reflect.UnsafeFloatFieldAccessorImpl.set(UnsafeFloatFieldAccessorImpl.java:80)
    java.lang.reflect.Field.set(Field.java:680)
    org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:79)
    org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues(AbstractEntityTuplizer.java:337)
    org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues(PojoEntityTuplizer.java:200)
    org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:3571)
    org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:133)
    org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:854)
    org.hibernate.loader.Loader.doQuery(Loader.java:729)
    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
    org.hibernate.loader.Loader.doList(Loader.java:2213)
    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
    org.hibernate.loader.Loader.list(Loader.java:2099)
    org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
    org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    nigeria.development.foundation.daoImpl.CyclosUsersDaoImpl.CyclosUsersAndAccountDetails(CyclosUsersDaoImpl.java:30)
    nigeria.development.foundation.serviceImpl.CyclosUsersServiceImpl.CyclosUsersAndAccountDetails(CyclosUsersServiceImpl.java:34)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:601)
    org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
    org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:108)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    com.sun.proxy.$Proxy16.CyclosUsersAndAccountDetails(Unknown Source)
    nigeria.development.foundation.controller.CyclosUsersController.listCyclosUsersOverdraftDetails(CyclosUsersController.java:50)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:601)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710)
    org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414)
    org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.30 logs.

【问题讨论】：

根据堆栈跟踪，错误来自CyclosUsersDaoImpl 类，当它尝试从会话中列出时。你能从CyclosUsersDaoImpl 类中发布CyclosUsersAndAccountDetails 方法的代码吗？

标签： java hibernate jsp spring-mvc

【解决方案1】：

将 @Column 注释中的可为空属性设置为 true，

@Column(name = "credit_limit", nullable=true) //nullable set true
private Float creditLimit;  //Float instead of float

并使用非原始包装类型 Float 而不是 float（它是原始类型）。

【讨论】：

谢谢。您的建议解决了 60% 的问题。虽然错误消失了，但没有插入。场景是这样的：下拉框由数据库中帐户表中的列中的 ownerName 值填充。 ownerName 是数据库中已存在的用户，因此无需为其创建新记录。要做的简单的事情就是为 ownerName 插入一个 creditLimit，因此当在下拉框中选择任何这些 ownerName 时，将为它设置一个 creditLimit。
您是否获得了在您的控制器中选择的 ownerName 的 creditLimit 值。它唯一的原因是该 creditLimit 为空，您遇到了一个错误..做一点 jquery 或 javascript 并设置 creditLimit从下拉框中选择的相应所有者名称的输入框中的值..当您提交表单时，您必须将此参数发送到控制器，然后设置信用额度的值..根据下拉框中选择的所有者名称以编程方式执行或允许用户手动输入值..

【解决方案2】：

堆栈跟踪非常清楚：您没有为CyclosUsers 类的creditLimit 属性分配值，这是一个原语，因此不能是null。

另外，我认为您的查询语法不正确；而不是：

INSERT INTO credit_limit WHERE

尝试类似：

INSERT INTO table_name (column_1, column_2) VALUES (value_1, value_2);

（具体语法可能因您使用的数据库引擎而异）。

如果您发布 CyclosUsers 类的代码，我可能会提供更多帮助。

【讨论】：