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私はplay jpaを使用していますが、この発見されました。完全なStackoverflow couldnt解決策を見つけました。PersistenceException：ClassNotFoundによって引き起こされたエンティティマネージャファクトリを構築できません
私がしようとしていることlocalhost：9000がヒットしたので、HomeControllerはmysqlで既に作成されたdb "crud"テーブルにProductを追加する必要があります。だから、ここで
私の第一JPAプログラムを完了します私のpersistence.xmlここ
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
version="2.1">
<persistence-unit name="test" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<non-jta-data-source>DefaultDS</non-jta-data-source>
<class>models.Product</class>
<properties>
<property name="javax.persistence.jdbc.url"
value="jdbc:mysql://localhost:3306/crud"/>
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.password"
value="toor"/>
<property name="javax.persistence.jdbc.driver"
value="com.mysql.jdbc.Driver"/>
</properties>
</persistence-unit>
</persistence>
であるここに私のapplication.conf
play.modules.enabled += "play.filters.csrf.CSRFModule"
play.filters.csrf {
token {
name = "csrfToken"
sign = true
}
cookie {
name = null
secure = ${play.http.session.secure}
httpOnly = false
}
body.bufferSize = ${play.http.parser.maxMemoryBuffer}
bypassCorsTrustedOrigins = true
header {
name = "Csrf-Token"
protectHeaders {
Cookie = "*"
Authorization = "*"
}
bypassHeaders {}
}
method {
whiteList = ["GET", "HEAD", "OPTIONS"]
blackList = []
}
contentType {
whiteList = []
blackList = []
}
errorHandler = null
}
play.crypto.secret="VRZV/ppo<t?;NKZN?
=PE<N;Yie_G^:sxQrL544YEl[fRsrE<:hMbT;Yj<WhG`[email protected]"
db.default.driver=com.mysql.jdbc.Driver
db.default.url="jdbc:mysql://localhost:3306/crud"
db.default.user=root
db.default.pass=toor
db.default.jndiName=DefaultDS
jpa.default = test
は、スタックトレース
play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[PersistenceException: Unable to build entity manager factory]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:255)
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:182)
at play.core.server.AkkaHttpServer$$anonfun$$nestedInanonfun$executeHandler$1$1.applyOrElse(AkkaHttpServer.scala:252)
at play.core.server.AkkaHttpServer$$anonfun$$nestedInanonfun$executeHandler$1$1.applyOrElse(AkkaHttpServer.scala:251)
at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:412)
at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
at play.api.libs.streams.Execution$trampoline$.execute(Execution.scala:70)
at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:68)
at scala.concurrent.impl.Promise$DefaultPromise.dispatchOrAddCallback(Promise.scala:312)
Caused by: javax.persistence.PersistenceException: **Unable to build entity manager factory**
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:83)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
at controllers.HomeController.index(HomeController.java:29)
at router.Routes$$anonfun$routes$1.$anonfun$applyOrElse$2(Routes.scala:174)
at play.core.routing.HandlerInvokerFactory$$anon$3.resultCall(HandlerInvoker.scala:136)
at play.core.routing.HandlerInvokerFactory$$anon$3.resultCall(HandlerInvoker.scala:135)
at play.core.routing.HandlerInvokerFactory$JavaActionInvokerFactory$$anon$8$$anon$2$$anon$1.invocation(HandlerInvoker.scala:110)
at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:78)
Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [models.Product]
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:245)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.buildHibernateConfiguration(EntityManagerFactoryBuilderImpl.java:1136)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:853)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:75)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
Caused by: java.lang.ClassNotFoundException: **Could not load requested class : models.Product**
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader.findClass(ClassLoaderServiceImpl.java:230)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:242)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.buildHibernateConfiguration(EntityManagerFactoryBuilderImpl.java:1136)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:853)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
Product.java（モデルクラス）
package models;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.*;
@Entity
public class Product {
private static List<Product> products;
@Id
@GeneratedValue
private String ean;
@Column
private String name;
@Column
private String description;
public Product() {
}
public Product(String ean, String name, String description) {
this.ean = ean;
this.name = name;
this.description = description;
}
public String toString() {
return String.format("%s -%s", this.ean, this.name);
}
static {
products = new ArrayList<Product>();
products.add(new Product("11111111", "Clip 1", "description 1"));
products.add(new Product("22222222", "Clip 2", "description 2"));
products.add(new Product("33333333", "Clip 3", "description 3"));
products.add(new Product("44444444", "Clip 4", "description 4"));
products.add(new Product("55555555", "Clip 5", "description 5"));
}
public static List<Product> findAll() {
return new ArrayList<Product>(products);
}
public static Product findByEan(String ean) {
for (Product candidate : products) {
if (candidate.ean.equals(ean)) {
return candidate;
}
}
return null;
}
public static List<Product> findByName(String term) {
final List<Product> results = new ArrayList<Product>();
for (Product candidate : products) {
if (candidate.name.toLowerCase().contains(term.toLowerCase())) {
results.add(candidate);
}
}
return results;
}
public static boolean remove(Product product) {
return products.remove(product);
}
public void save() {
products.remove(findByEan(this.ean));
products.add(this);
}
public static List<Product> getProducts() {
return products;
}
public String getEan() {
return ean;
}
public void setEan(String ean) {
this.ean = ean;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
そしてHomecontroller.java
package controllers;
import models.Product;
import org.hibernate.jpa.HibernatePersistenceProvider;
import play.data.FormFactory;
import play.libs.concurrent.HttpExecutionContext;
import play.mvc.*;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
public class HomeController extends Controller {
private final FormFactory formFactory;
private final HttpExecutionContext ec;
@Inject
public HomeController(FormFactory formFactory, HttpExecutionContext ec) {
this.formFactory = formFactory;
this.ec = ec;
}
public Result index() {
//Create a database and add some entries
Product newproduct=new Product();
EntityManagerFactory entityManagerFactory= Persistence.createEntityManagerFactory("test");
//Stuck at the above statment
EntityManager entityManager=entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
newproduct.setEan("111");
newproduct.setName("Lapy");
newproduct.setDescription("Uska description");
entityManager.persist(newproduct);
entityManager.getTransaction().commit();
entityManager.close();
entityManagerFactory.close();
return ok(views.html.index.render("Database created check mysql"));
}
}
のEntityManagerFactoryはモデルクラスの製品をロードすることができません。私はこのサイトでいろいろな解決策を試しました。
クラスをロードできない場合、クラスはロード可能な場所（CLASSPATHなど）にありません。あなたはCLASSPATHに何があるのかについての情報を提供しないので、魔法の呪文の人々が何を提供するのかは分かりません。 –
'static'を' Product'クラスの 'private static List;'から削除しようとしています。 –
@AbdullahKhan did not work –