Oops: IncompatibleClassChangeError - playframework

Question

Model/My_Table_Name.java

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package models;

import java.util.*;
import javax.persistence.*;
import play.db.jpa.*;



@Entity
@Table(name="My_Table_Name")
public class My_Table_Name extends Model{
    public int rid;
    public boolean siteEnabled;
    public String finalUrl;
    public String errorUrl;
    public boolean tokenRequired;

    public My_Table_Name(int rid,boolean siteEnabled, 
            String finalUrl, String errorUrl, boolean  tokenRequired)
    {
        this.rid = rid;
        this.errorUrl = errorUrl;
        this.finalUrl = finalUrl;

        this.siteEnabled = siteEnabled;
        this.tokenRequired = tokenRequired;
    }

}

控制器/应用程序.java

@Before
    static void doSomething()
    {
        List<My_Table_Name> config = My_Table_Name.findAll();
        redirect(config.get(0).finalUrl);

    }

错误：

Oops: IncompatibleClassChangeError 

An unexpected error occured caused by exception IncompatibleClassChangeError:
 Implementing class

堆栈跟踪：

Oops: IncompatibleClassChangeError
An unexpected error occured caused by exception IncompatibleClassChangeError: Implementing class

play.exceptions.UnexpectedException: Unexpected Error
    at play.Invoker$Invocation.onException(Invoker.java:244)
    at play.Invoker$Invocation.run(Invoker.java:286)
    at Invocation.HTTP Request(Play!)
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.hibernate.ejb.Ejb3Configuration.<clinit>(Ejb3Configuration.java:129)
    at play.db.jpa.JPAPlugin.onApplicationStart(JPAPlugin.java:118)
    at play.plugins.PluginCollection.onApplicationStart(PluginCollection.java:480)
    at play.Play.start(Play.java:515)
    at play.Play.detectChanges(Play.java:618)
    at play.Invoker$Invocation.init(Invoker.java:198)
    ... 1 more

上面是我的代码，我正在遵循YABE教程的指南，并使用test for Post类，但我认为我可以使用我自己的mysql数据库中的现有表。

Answer 1

解决了这个问题。显然，当我为我的项目运行依赖项时，它带来了旧版本的hibernate，并且在类路径中有两个对hibernate的引用。

一个在我的lib文件夹中

另一个在play\lib文件夹中

我从我的*.jar \lib文件夹中删除了hibernate库，一切正常