本文介绍了Hibernate NoSuchFieldError INSTANCE，但仅限于Struts 1？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我是Java和Hibernate的新手（是Rails和C＃开发人员）。无论如何，我有一个测试程序可以与Hibernate一起使用，但是我的实际Web应用程序（Struts 1）崩溃了：
SEVERE：Servlet.service （）for servlet default抛出异常
java.lang.NoSuchFieldError：INSTANCE
我正在使用：
Hibernate 3.6.1 with Annotations
Struts 1与Apache Tiles
C3P0连接池
这是实际上 WORKS 的程序。这是主要项目的一部分。只是一个简单的JAVA测试。
public class TestUser {
public static void main（String []] args）{
SessionFactory factory = HibernateUtil.getSessionFactory（）;
Session session = factory.getCurrentSession（）;
session.beginTransaction（）;
String queryString =from User where UserName ='Quake';
Query query = session.createQuery（queryString）;
User quake =（User）query.uniqueResult（）;
session.getTransaction（）。commit（）;
System.out.println（quake.getEmail（））;
System.out.println（Active？+ quake.isActive（））;
UserRepository userRepo = new UserRepository（）;
System.out.println（User Quake：+ userRepo.findAll（）。get（0）.getEmail（））;
$ b $ / code> 工作得很好。输出一些示例数据。
现在，当我尝试在Struts中执行相同的操作时，出现异常。这就是 NOT WORK ：
public class ListUsers扩展了org.apache.struts.action。行动{
/ *前进名=成功路径=* /
私有静态最终字符串SUCCESS =成功;
/ **
*这是Struts框架调用的动作。
* @param映射用于选择此实例的ActionMapping。
* @param形式此请求的可选ActionForm bean。
* @param请求我们正在处理的HTTP请求。
* @param response我们正在处理的HTTP响应。
* @throws java.lang.Exception
* @return
* /
@Override
public ActionForward execute（ActionMapping映射，ActionForm表单，
HttpServletRequest请求，HttpServletResponse响应）
抛出异常{
List< String> listMsg = new ArrayList< String>（）;
listMsg.add（Message A）;
listMsg.add（Message B）;
listMsg.add（Message C）;
listMsg.add（Message D）;
request.setAttribute（listMsg，listMsg）;
UserRepository userRepo = new UserRepository（）; （见HibernateUtil）
String email = userRepo.first（）。getEmail（）;
返回mapping.findForward（SUCCESS）;
$ p这是我的HibernateUtil类： public class HibernateUtil {
private static final SessionFactory sessionFactory = buildSessionFactory（）;
private static SessionFactory buildSessionFactory（）{
try {
//从hibernate.cfg.xml创建SessionFactory
Configuration config = new Configuration（）; //这条线在STRUTS中崩溃
//添加带注释的类
config.addAnnotatedClass（User.class）;
config.configure（）;
return config.buildSessionFactory（）;
} catch（Throwable ex）{
//确保记录异常，因为它可能被吞噬
System.err.println（Initial SessionFactory creation failed。WTFQNIL ：+ ex）;
抛出新的ExceptionInInitializerError（ex）;
public static SessionFactory getSessionFactory（）{
return sessionFactory;
$ / code> Configuration config = new在 HibernateUtil 中的Configuration（）行是在Struts中崩溃的行，但不是测试应用程序。
以下是完整的异常转储：
2011年2月24日上午9:51:58 org.apache.catalina.core.StandardWrapperValve调用
SEVERE：servlet默认的Servlet.service（）抛出异常
java.lang.NoSuchFieldError：INSTANCE $ b $在org。 hibernate.type.BasicTypeRegistry。< init>（BasicTypeRegistry.java:94）
在org.hibernate.type.TypeResolver。< init>（TypeResolver.java:59）
在org.hibernate。 cfg.Configuration。< init>（Configuration.java:249）
at org.hibernate.cfg.Configuration。< init>（Configuration.java:300）
at com.kencogroup.kkms。 struts.utilities.HibernateUtil.buildSessionFactory（HibernateUtil.java:22）
at com.kencogroup.kkms.struts.utilities.HibernateUtil。< clinit>（HibernateUtil.java:17）
at com.kencogroup .dao.repositories.UserRepository.first（UserRepository.java:33）
at com.kencogroup.kkms.struts.actions.ListUsers.execute（ListUsers.java:52）
at org.apache.struts .action.RequestProcessor.pro在org.apache.struts.action.RequestProcessor.process（RequestProcessor.java:228）
在org.apache.struts.action.ActionServlet.process（ActionServlet。
） java：1913）
at org.apache.struts.action.ActionServlet.doGet（ActionServlet.java:449）
at javax.servlet.http.HttpServlet.service（HttpServlet.java:617）
at javax.servlet.http.HttpServlet.service（HttpServlet.java:717）
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:290）
at org.apache .catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite（RuleChain.java:176）
at org.tuckey.web .filters.urlrewrite.RuleChain.doRules（RuleChain.java:145）
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest（UrlRewriter.java:92）
at org.tuckey.web .filters.urlrewrite.UrlRewriteFilter.doFilter（UrlRewriteFilter.java:381）
在org.apache.c atalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:235）
at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）
at org.netbeans.modules.web。 monitor.server.MonitorFilter.doFilter（MonitorFilter.java:393）
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:235）
at org.apache.catalina.core。 ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）
at org.apache.catalina.core.ApplicationDispatcher.invoke（ApplicationDispatcher.java:646）
at org.apache.catalina.core.ApplicationDispatcher.processRequest（ ApplicationDispatcher.java:436）
at org.apache.catalina.core.ApplicationDispatcher.doForward（ApplicationDispatcher.java:374）
at org.apache.catalina.core.ApplicationDispatcher.forward（ApplicationDispatcher.java： 302）
在org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite（NormalRewrittenUrl.java:213）
在org.tuckey.web.filter s.urlrewrite.RuleChain.handleRewrite（RuleChain.java:171）
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules（RuleChain.java:145）
at org.tuckey.web。 filters.urlrewrite.UrlRewriter.processRequest（UrlRewriter.java:92）
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter（UrlRewriteFilter.java:381）
at org.apache.catalina。 core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:235）
at org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）
at org.netbeans.modules.web.monitor。 server.MonitorFilter.doFilter（MonitorFilter.java:393）
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:235）
at org.apache.catalina.core.ApplicationFilterChain。 （org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve。 Ĵ ava：191）
at org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:127）
at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:102）
at org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:109）
at org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:298）
在org.apache.coyote.http11.Http11AprProcessor.process（Http11AprProcessor.java:859）
at org.apache.coyote.http11.Http11AprProtocol $ Http11ConnectionHandler.process（Http11AprProtocol.java:579）
at org .apache.tomcat.util.net.AprEndpoint $ Worker.run（AprEndpoint.java:1555）$ b $ at java.lang.Thread.run（Thread.java:662）
我做错了什么？
谢谢！
解决方案它看起来像在classpath中有几个Hibernate jars版本。I'm new to Java and Hibernate (being a Rails and C# developer). Anyway, I have a test program that works fine with Hibernate but my actual web app (Struts 1) crashes with:
SEVERE: Servlet.service() for servlet default threw exception
java.lang.NoSuchFieldError: INSTANCE
I am using:
Hibernate 3.6.1 with Annotations
Struts 1 with Apache Tiles
C3P0 connection pool
Here is the program that actually WORKS. It's a part of the main project. Just a simple JAVA test.
public class TestUser {
public static void main(String[] args) {
SessionFactory factory = HibernateUtil.getSessionFactory();
Session session = factory.getCurrentSession();
session.beginTransaction();
String queryString = "from User where UserName = 'Quake'";
Query query = session.createQuery(queryString);
User quake = (User)query.uniqueResult();
session.getTransaction().commit();
System.out.println( quake.getEmail() );
System.out.println( "Active? " + quake.isActive() );
UserRepository userRepo = new UserRepository();
System.out.println( "User Quake: " + userRepo.findAll().get(0).getEmail() );
}
}
Works just fine. Outputs a little sample data.
Now, when I try to do the same thing in Struts, I get the exception. This is what does NOT WORK:
public class ListUsers extends org.apache.struts.action.Action {
/* forward name="success" path="" */
private static final String SUCCESS = "success";
/**
* This is the action called from the Struts framework.
* @param mapping The ActionMapping used to select this instance.
* @param form The optional ActionForm bean for this request.
* @param request The HTTP Request we are processing.
* @param response The HTTP Response we are processing.
* @throws java.lang.Exception
* @return
*/
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
List<String> listMsg = new ArrayList<String>();
listMsg.add("Message A");
listMsg.add("Message B");
listMsg.add("Message C");
listMsg.add("Message D");
request.setAttribute("listMsg", listMsg);
UserRepository userRepo = new UserRepository(); // CRASHES HERE (see HibernateUtil)
String email = userRepo.first().getEmail();
return mapping.findForward(SUCCESS);
}
}
This is my HibernateUtil class:
public class HibernateUtil {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate.cfg.xml
Configuration config = new Configuration(); // THIS LINE CRASHES IN STRUTS
// Add annotated classes
config.addAnnotatedClass(User.class);
config.configure();
return config.buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed. WTFQNIL: " + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
The Configuration config = new Configuration() line in the HibernateUtil is the line that crashes in Struts but not the test app.
Here is the complete exception dump:
Feb 24, 2011 9:51:58 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet default threw exception
java.lang.NoSuchFieldError: INSTANCE
at org.hibernate.type.BasicTypeRegistry.<init>(BasicTypeRegistry.java:94)
at org.hibernate.type.TypeResolver.<init>(TypeResolver.java:59)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:249)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:300)
at com.kencogroup.kkms.struts.utilities.HibernateUtil.buildSessionFactory(HibernateUtil.java:22)
at com.kencogroup.kkms.struts.utilities.HibernateUtil.<clinit>(HibernateUtil.java:17)
at com.kencogroup.dao.repositories.UserRepository.first(UserRepository.java:33)
at com.kencogroup.kkms.struts.actions.ListUsers.execute(ListUsers.java:52)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:381)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
at java.lang.Thread.run(Thread.java:662)
What am I doing wrong?
Thanks!
解决方案 It looks like you have several versions of Hibernate jars in the classpath.
这篇关于Hibernate NoSuchFieldError INSTANCE，但仅限于Struts 1？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！
08-19 23:23