我无法弄清楚为什么在Servlet中却出现此错误，而在我的测试类中却没有：java.lang.NoClassDefFoundError: org/hibernate/service/ServiceRegistry
我有休眠的5.1.14
该servlet在下面。代码在BookDAO dao = DAOUtilities.getBookDAO();处崩溃。我测试过，它实际上在我所有的DAO上都崩溃了。它只是获得一个数据访问对象（DAO），以便我可以检索数据库中的所有书籍。我还将包括工作测试类以进行比较。让我知道您是否还需要查看其他内容。
编辑：我不使用Maven（至少不是故意）。我正在手动添加JAR。
package examples.pubhub.servlets;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import examples.pubhub.dao.*;
import examples.pubhub.model.*;
import examples.pubhub.utilities.DAOUtilities;
/*
* This servlet will take you to the homepage for the Book Publishing module (level 100)
*/
@WebServlet("/BookPublishing")
public class BookPublishingServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//Get our DAOs
System.out.println("Getting DAOs");
BookDAO dao = DAOUtilities.getBookDAO(); //fails here
TagDAO tgdao = DAOUtilities.getTagDAO();
// Grab the list of Books from the Database
List<Book> bookList = dao.getAllBooks();
//Grab the tags for each book from the Database
HashMap<String, String> booktags = new HashMap<String, String>();
for(Book b : bookList) {
String tags = "";
List<Tag> tempTags = tgdao.getTagsByBook(b);
for(Integer i=0; i<tempTags.size(); i++) {
tags+=tempTags.get(i).getName()+";";
}
tags = tags.substring(0, tags.length() - 1);
booktags.put(b.getIsbn13(), tags);
}
// Populate the list into a variable that will be stored in the session
request.getSession().setAttribute("books", bookList);
request.getSession().setAttribute("booktags", booktags);
request.getRequestDispatcher("bookPublishingHome.jsp").forward(request, response);
}
}
完整日志，直到崩溃为止：
16:02:47,813 INFO [org.jboss.modules] (main) JBoss Modules version 1.7.0.Final
16:02:48,101 INFO [org.jboss.msc] (main) JBoss MSC version 1.3.2.Final
16:02:48,110 INFO [org.jboss.threads] (main) JBoss Threads version 2.3.1.Final
16:02:48,215 INFO [org.jboss.as] (MSC service thread 1-2) WFLYSRV0049: WildFly Full 12.0.0.Final (WildFly Core 4.0.0.Final) starting
16:02:49,460 INFO [org.jboss.as.controller.management-deprecated] (Controller Boot Thread) WFLYCTL0028: Attribute 'security-realm' in the resource at address '/core-service=management/management-interface=http-interface' is deprecated, and may be removed in a future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation.
16:02:49,480 INFO [org.wildfly.security] (ServerService Thread Pool -- 27) ELY00001: WildFly Elytron version 1.2.2.Final
16:02:49,482 INFO [org.jboss.as.controller.management-deprecated] (ServerService Thread Pool -- 19) WFLYCTL0028: Attribute 'security-realm' in the resource at address '/subsystem=undertow/server=default-server/https-listener=https' is deprecated, and may be removed in a future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation.
16:02:49,563 INFO [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 1) WFLYDS0004: Found PubHub.war in deployment directory. To trigger deployment create a file called PubHub.war.dodeploy
16:02:49,590 INFO [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0039: Creating http management service using socket-binding (management-http)
16:02:49,616 INFO [org.xnio] (MSC service thread 1-8) XNIO version 3.6.2.Final
16:02:49,622 INFO [org.xnio.nio] (MSC service thread 1-8) XNIO NIO Implementation Version 3.6.2.Final
16:02:49,649 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 42) WFLYCLINF0001: Activating Infinispan subsystem.
16:02:49,667 INFO [org.jboss.as.jaxrs] (ServerService Thread Pool -- 43) WFLYRS0016: RESTEasy version 3.5.0.Final
16:02:49,671 INFO [org.jboss.as.webservices] (ServerService Thread Pool -- 60) WFLYWS0002: Activating WebServices Extension
16:02:49,675 INFO [org.jboss.as.jsf] (ServerService Thread Pool -- 48) WFLYJSF0007: Activated the following JSF Implementations: [main]
16:02:49,677 INFO [org.jboss.as.naming] (ServerService Thread Pool -- 50) WFLYNAM0001: Activating Naming Subsystem
16:02:49,744 INFO [org.jboss.as.naming] (MSC service thread 1-4) WFLYNAM0003: Starting Naming Service
16:02:49,745 WARN [org.jboss.as.txn] (ServerService Thread Pool -- 58) WFLYTX0013: The node-identifier attribute on the /subsystem=transactions is set to the default value. This is a danger for environments running multiple servers. Please make sure the attribute value is unique.
16:02:49,746 INFO [org.jboss.as.connector] (MSC service thread 1-6) WFLYJCA0009: Starting JCA Subsystem (WildFly/IronJacamar 1.4.7.Final)
16:02:49,762 INFO [org.wildfly.extension.undertow] (MSC service thread 1-2) WFLYUT0003: Undertow 2.0.0.Final starting
16:02:49,811 INFO [org.jboss.remoting] (MSC service thread 1-4) JBoss Remoting version 5.0.5.Final
16:02:49,818 INFO [org.jboss.as.security] (ServerService Thread Pool -- 57) WFLYSEC0002: Activating Security Subsystem
16:02:49,825 INFO [org.wildfly.extension.io] (ServerService Thread Pool -- 41) WFLYIO001: Worker 'default' has auto-configured to 8 core threads with 64 task threads based on your 4 available processors
16:02:49,828 INFO [org.jboss.as.security] (MSC service thread 1-1) WFLYSEC0001: Current PicketBox version=5.0.2.Final
16:02:49,835 INFO [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 36) WFLYJCA0004: Deploying JDBC-compliant driver class org.h2.Driver (version 1.4)
16:02:49,838 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-8) WFLYJCA0018: Started Driver service with driver-name = h2
16:02:49,944 INFO [org.jboss.as.ejb3] (MSC service thread 1-1) WFLYEJB0481: Strict pool slsb-strict-max-pool is using a max instance size of 64 (per class), which is derived from thread worker pool sizing.
16:02:49,944 INFO [org.jboss.as.ejb3] (MSC service thread 1-1) WFLYEJB0482: Strict pool mdb-strict-max-pool is using a max instance size of 16 (per class), which is derived from the number of CPUs on this host.
16:02:49,993 INFO [org.jboss.as.mail.extension] (MSC service thread 1-8) WFLYMAIL0001: Bound mail session [java:jboss/mail/Default]
16:02:50,066 INFO [org.wildfly.extension.undertow] (ServerService Thread Pool -- 59) WFLYUT0014: Creating file handler for path 'C:\wildfly/welcome-content' with options [directory-listing: 'false', follow-symlink: 'false', case-sensitive: 'true', safe-symlink-paths: '[]']
16:02:50,075 INFO [org.wildfly.extension.undertow] (MSC service thread 1-4) WFLYUT0012: Started server default-server.
16:02:50,094 INFO [org.wildfly.extension.undertow] (MSC service thread 1-6) WFLYUT0018: Host default-host starting
16:02:50,859 INFO [org.wildfly.extension.undertow] (MSC service thread 1-5) WFLYUT0006: Undertow HTTP listener default listening on 127.0.0.1:8080
16:02:51,069 INFO [org.jboss.as.patching] (MSC service thread 1-6) WFLYPAT0050: WildFly Full cumulative patch ID is: base, one-off patches include: none
16:02:51,081 WARN [org.jboss.as.domain.management.security] (MSC service thread 1-2) WFLYDM0111: Keystore C:\wildfly\standalone\configuration\application.keystore not found, it will be auto generated on first use with a self signed certificate for host localhost
16:02:51,090 INFO [org.jboss.as.server.deployment.scanner] (MSC service thread 1-5) WFLYDS0013: Started FileSystemDeploymentService for directory C:\wildfly\standalone\deployments
16:02:51,113 INFO [org.jboss.as.server.deployment] (MSC service thread 1-4) WFLYSRV0027: Starting deployment of "PostgreSQL_JDBC_JAR" (runtime-name: "postgresql-42.2.2.jar")
16:02:51,114 INFO [org.jboss.as.server.deployment] (MSC service thread 1-3) WFLYSRV0027: Starting deployment of "PubHub.war" (runtime-name: "PubHub.war")
16:02:51,127 INFO [org.wildfly.extension.undertow] (MSC service thread 1-7) WFLYUT0006: Undertow HTTPS listener https listening on 127.0.0.1:8443
16:02:51,168 INFO [org.jboss.as.ejb3] (MSC service thread 1-3) WFLYEJB0493: EJB subsystem suspension complete
16:02:51,468 INFO [org.jboss.ws.common.management] (MSC service thread 1-7) JBWS022052: Starting JBossWS 5.2.0.Final (Apache CXF 3.2.2)
16:02:51,506 INFO [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-1) WFLYJCA0001: Bound data source [java:jboss/datasources/ExampleDS]
16:02:51,732 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-5) WFLYJCA0005: Deploying non-JDBC-compliant driver class org.postgresql.Driver (version 42.2)
16:02:51,747 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-6) WFLYJCA0018: Started Driver service with driver-name = postgresql-42.2.2.jar
16:02:51,752 INFO [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-3) WFLYJCA0001: Bound data source [java:/PostgresDS]
16:02:51,891 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-1) WFLYJCA0005: Deploying non-JDBC-compliant driver class org.postgresql.Driver (version 42.1)
16:02:51,920 INFO [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-2) WFLYJCA0018: Started Driver service with driver-name = PubHub.war_org.postgresql.Driver_42_1
16:02:52,038 INFO [org.infinispan.factories.GlobalComponentRegistry] (MSC service thread 1-3) ISPN000128: Infinispan version: Infinispan 'Bastille' 9.1.6.Final
16:02:52,176 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 62) WFLYCLINF0002: Started client-mappings cache from ejb container
16:02:52,331 WARN [io.undertow.servlet] (ServerService Thread Pool -- 80) UT015020: Path /admin/* is secured for some HTTP methods, however it is not secured for [TRACE, HEAD, DELETE, CONNECT, OPTIONS, PUT]
16:02:52,345 INFO [org.wildfly.extension.undertow] (ServerService Thread Pool -- 80) WFLYUT0021: Registered web context: '/PubHub' for server 'default-server'
16:02:52,355 INFO [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0010: Deployed "PostgreSQL_JDBC_JAR" (runtime-name : "postgresql-42.2.2.jar")
16:02:52,385 INFO [org.jboss.as.server] (ServerService Thread Pool -- 37) WFLYSRV0010: Deployed "PubHub.war" (runtime-name : "PubHub.war")
16:02:52,441 INFO [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0212: Resuming server
16:02:52,443 INFO [org.jboss.as] (Controller Boot Thread) WFLYSRV0060: Http management interface listening on http://127.0.0.1:9990/management
16:02:52,443 INFO [org.jboss.as] (Controller Boot Thread) WFLYSRV0051: Admin console listening on http://127.0.0.1:9990
16:02:52,443 INFO [org.jboss.as] (Controller Boot Thread) WFLYSRV0025: WildFly Full 12.0.0.Final (WildFly Core 4.0.0.Final) started in 5573ms - Started 776 of 969 services (318 services are lazy, passive or on-demand)
16:07:01,538 INFO [stdout] (default task-1) Getting DAOs
16:07:01,542 ERROR [io.undertow.request] (default task-1) UT005023: Exception handling request to /PubHub/BookPublishing: java.lang.NoClassDefFoundError: org/hibernate/service/ServiceRegistry
at examples.pubhub.servlets.BookPublishingServlet.doGet(BookPublishingServlet.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:67)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:53)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:59)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction$$Lambda$769/1655281877.call(Unknown Source)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1526)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$770/1853163366.call(Unknown Source)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1526)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$770/1853163366.call(Unknown Source)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1526)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$770/1853163366.call(Unknown Source)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1526)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction$$Lambda$770/1853163366.call(Unknown Source)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:360)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.hibernate.service.ServiceRegistry from [Module "deployment.PubHub.war" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:199)
at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:412)
at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:400)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
... 51 more
这是测试班：
package examples.pubhub.test;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import examples.pubhub.dao.*;
import examples.pubhub.model.*;
import examples.pubhub.utilities.DAOUtilities;
public class TestTagDAO {
//isbn:1111111111111
public static void main(String[] args) {
String isbn = "1111111111111";
String name1 = "test1";
String name2 = "test2";
String name3 = "test3";
String name4 = "test4";
List<Tag> tags = new ArrayList<>();
List<Book> books = new ArrayList<Book>();
TagDAO tagDao = DAOUtilities.getTagDAO();
BookDAO bookDao = DAOUtilities.getBookDAO();
Book book = bookDao.getBookByISBN(isbn);
books = bookDao.getAllBooks();
}
}
答案 0 :(得分：1)
您是否已将hibernate-core依赖项添加到pom.xml中？
如果不添加这样的内容
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.x.x</version>
</dependency>
答案 1 :(得分：0)
最近我实际上在使用Eclipse时遇到了这个问题。我发现有时候，Eclipse会随机（烦人）不生成所需的.class文件。通常，我从项目中删除/ bin /目录，然后刷新并清理我的项目，它将生成相应的.class文件。在执行此操作之前，请检查/ class /目录中是否存在.class文件。
除此之外，如果要手动添加.JAR文件，请检查它们是否在构建路径中。