这是完整的错误： -
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [] threw exception [Request processing failed; nested exception is org.hibernate.exception.ConstraintViolationException: NULL not allowed for column "PRODUCTID"; SQL statement:
insert into Product (productId, productCategory, productCondition, productDescription, productManufacturer, productName, productPrice, productStatus, unitInStock) values (null, ?, ?, ?, ?, ?, ?, ?, ?) [23502-190]] with root cause
org.h2.jdbc.JdbcSQLException: NULL not allowed for column "PRODUCTID"; SQL statement:
insert into Product (productId, productCategory, productCondition, productDescription, productManufacturer, productName, productPrice, productStatus, unitInStock) values (null, ?, ?, ?, ?, ?, ?, ?, ?) [23502-193]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
at org.h2.message.DbException.get(DbException.java:179)
at org.h2.message.DbException.get(DbException.java:155)
at org.h2.table.Column.validateConvertUpdateSequence(Column.java:311)
at org.h2.table.Table.validateConvertUpdateSequence(Table.java:784)
at org.h2.command.dml.Insert.insertRows(Insert.java:151)
at org.h2.command.dml.Insert.update(Insert.java:114)
at org.h2.command.CommandContainer.update(CommandContainer.java:98)
at org.h2.command.Command.executeUpdate(Command.java:258)
at org.h2.server.TcpServerThread.process(TcpServerThread.java:344)
at org.h2.server.TcpServerThread.run(TcpServerThread.java:158)
at java.lang.Thread.run(Unknown Source)
at org.h2.engine.SessionRemote.done(SessionRemote.java:624)
at org.h2.command.CommandRemote.executeUpdate(CommandRemote.java:191)
at org.h2.jdbc.JdbcPreparedStatement.executeUpdateInternal(JdbcPreparedStatement.java:157)
at org.h2.jdbc.JdbcPreparedStatement.executeUpdate(JdbcPreparedStatement.java:143)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122)
at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81)
at com.sun.proxy.$Proxy33.executeUpdate(Unknown Source)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:55)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2757)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3268)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:78)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:272)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:304)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:128)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:204)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:189)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:114)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:615)
at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:608)
at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:604)
at com.emusicstore.dao.impl.ProductDaoImpl.addProduct(ProductDaoImpl.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
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$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy28.addProduct(Unknown Source)
at com.emusicstore.controller.AdminController.addProductPost(AdminController.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
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:777)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
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:301)
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.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$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:78)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1033)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:652)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
my add product page:-
`<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@include file="/WEB-INF/views/template/header.jsp" %>
<div class="container-wrapper">
<div class="container">
<div class="page-header">
<h1>Add Product</h1>
<p class="lead">Fill the below information to add a product:</p>
</div>
<form:form action="${pageContext.request.contextPath}/admin/productInventory/addProduct" commandName="product" method="Post"
enctype="multipart/form-data">
<div class="form-group">
<label for="name">Name</label> <form:errors path="productName" cssStyle="color: #ff0000;" />
<form:input path="productName" id="name" class="form-Control"/>
</div>
<div class="form-group">
<label for="category">Category</label>
<label class="checkbox-inline"><form:radiobutton path="productCategory" id="category"
value="instrument" />Instrument</label>
<label class="checkbox-inline"><form:radiobutton path="productCategory" id="category"
value="record" />Record</label>
<label class="checkbox-inline"><form:radiobutton path="productCategory" id="category"
value="accessory" />Accessory</label>
</div>
<div class="form-group">
<label for="description">Description</label>
<form:textarea path="productDescription" id="description" class="form-Control"/>
</div>
<div class="form-group">
<label for="price">Price</label> <form:errors path="productPrice" cssStyle="color: #ff0000;" />
<form:input path="productPrice" id="price" class="form-Control"/>
</div>
<div class="form-group">
<label for="condition">Condition</label>
<label class="checkbox-inline"><form:radiobutton path="productCondition" id="condition"
value="new" />New</label>
<label class="checkbox-inline"><form:radiobutton path="productCondition" id="condition"
value="used" />Used</label>
</div>
<div class="form-group">
<label for="status">Status</label>
<label class="checkbox-inline"><form:radiobutton path="productStatus" id="status"
value="active" />Active</label>
<label class="checkbox-inline"><form:radiobutton path="productStatus" id="status"
value="inactive" />Inactive</label>
</div>
<div class="form-group">
<label for="unitInStock">Unit In Stock</label> <form:errors path="unitInStock"
cssStyle="color: #ff0000;" />
<form:input path="unitInStock" id="unitInStock" class="form-Control"/>
</div>
<div class="form-group">
<label for="manufacturer">Manufacturer</label>
<form:input path="productManufacturer" id="manufacturer" class="form-Control"/>
</div>
<div class="form-group">
<label class="control-label" for="productImage">Upload Picture</label>
<form:input id="productImage" path="productImage" type="file" class="form:input-large" />
</div>
<br><br>
<input type="submit" value="submit" class="btn btn-default">
<a href="<c:url value="/admin/productInventory" />" class="btn btn-default">Cancel</a>
</form:form>
<%@include file="/WEB-INF/views/template/footer.jsp" %>
`
my controller maping:-
@RequestMapping(value = "/admin/productInventory/addProduct", method = RequestMethod.POST)
public String addProductPost(@Valid @ModelAttribute("product") Product product, BindingResult result,
HttpServletRequest request) {
if (result.hasErrors()) {
return "addProduct";
}
productDao.addProduct(product);
MultipartFile productImage = product.getProductImage();
String rootDirectory = request.getSession().getServletContext().getRealPath("/");
path = Paths.get(rootDirectory + "\\WEB-INF\\resources\\images\\" + product.getProductId() + ".png");
if (productImage != null && !productImage.isEmpty()) {
try {
productImage.transferTo(new File(path.toString()));
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Product image saving failed", e);
}
}
return "redirect:/admin/productInventory";
}
my model Product.java
package com.emusicstore.model;
import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.web.multipart.MultipartFile;
import javax.persistence.*;
import javax.validation.constraints.Digits;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;
import java.io.Serializable;
/**
* Created by Le on 1/2/2016.
*/
@Entity
public class Product implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int productId;
@Id
@NotEmpty (message = "The product name must not be null.")
private String productName;
private String productCategory;
private String productDescription;
@Min(value = 0, message = "The product price must no be less then zero.")
private double productPrice;
private String productCondition;
private String productStatus;
@Min(value = 0, message = "The product unit must not be less than zero.")
private int unitInStock;
private String productManufacturer;
@Transient
private MultipartFile productImage;
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public String getProductCategory() {
return productCategory;
}
public void setProductCategory(String productCategory) {
this.productCategory = productCategory;
}
public String getProductDescription() {
return productDescription;
}
public void setProductDescription(String productDescription) {
this.productDescription = productDescription;
}
public double getProductPrice() {
return productPrice;
}
public void setProductPrice(double productPrice) {
this.productPrice = productPrice;
}
public String getProductCondition() {
return productCondition;
}
public void setProductCondition(String productCondition) {
this.productCondition = productCondition;
}
public String getProductStatus() {
return productStatus;
}
public void setProductStatus(String productStatus) {
this.productStatus = productStatus;
}
public int getUnitInStock() {
return unitInStock;
}
public void setUnitInStock(int unitInStock) {
this.unitInStock = unitInStock;
}
public String getProductManufacturer() {
return productManufacturer;
}
public void setProductManufacturer(String productManufacturer) {
this.productManufacturer = productManufacturer;
}
public MultipartFile getProductImage() {
return productImage;
}
public void setProductImage(MultipartFile productImage) {
this.productImage = productImage;
}
}
my productdaoimpl： -
package com.emusicstore.dao.impl;
import com.emusicstore.dao.ProductDao;
import com.emusicstore.model.Product;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
/**
* Created by Le on 1/6/2016.
*/
@Repository
@Transactional
public class ProductDaoImpl implements ProductDao {
@Autowired
private SessionFactory sessionFactory;
public void addProduct(Product product) {
Session session = sessionFactory.getCurrentSession();
session.saveOrUpdate(product);
session.flush();
}
public void editProduct(Product product) {
Session session = sessionFactory.getCurrentSession();
session.saveOrUpdate(product);
session.flush();
}
public Product getProductById(int id) {
Session session = sessionFactory.getCurrentSession();
Product product = (Product) session.get(Product.class, id);
session.flush();
return product;
}
public List<Product> getAllProducts() {
Session session = sessionFactory.getCurrentSession();
Query query = session.createQuery("from Product");
List<Product> products = query.list();
session.flush();
return products;
}
public void deleteProduct (int id) {
Session session = sessionFactory.getCurrentSession();
session.delete(getProductById(id));
session.flush();
}
}
答案 0 :(得分：2)
您未设置productId的值，并在其中传递null。要自动增加productId，您可以将GenerationType.AUTO更改为GenerationType.IDENTITY。
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int productId;
希望这对你有用。