如何解决“找不到Dialect类:org.hibernate.dialect.MYSQLDialect"；例外? [英] How to resolve "Dialect class not found: org.hibernate.dialect.MYSQLDialect" Exception?

问题描述

我刚冬眠，所以我正在看视频教程进行练习.我关注的链接是

I am very new to hibernate so I am practicing by seeing video tutorial. The link I am following is,

https://www.youtube.com/watch? v = FFMOZY4z6bE& list = PL4AFF701184976B25& index = 5

这是eclipse中的简单Java项目.在这里，我使用mysql数据库.这是我的Hibernate.cfg.xml文件，

It is simple java project in eclipse. Here I use mysql Data base. Here is my Hibernate.cfg.xml file,

com.mysql.jdbc.Driver jdbc:mysql://本地主机:3306/hibernatedb 根 根

com.mysql.jdbc.Driver jdbc:mysql://localhost:3306/hibernatedb root root

    <!-- JDBC connection pool (use the built-in) -->
    <property name="connection.pool_size">1</property>

    <!-- SQL dialect -->
    <property name="dialect">org.hibernate.dialect.MYSQLDialect</property>

    <!-- Disable the second-level cache  -->
    <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

    <!-- Echo all executed SQL to stdout -->
    <property name="show_sql">true</property>

    <!-- Drop and re-create the database schema on startup -->
    <property name="hbm2ddl.auto">create</property>

    <!-- Names the annotated entity class -->
    <mapping class="com.***.dto.UserDetails"/>

我遇到这种错误，

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" org.hibernate.HibernateException: Dialect class not found:   org.hibernate.dialect.MYSQLDialect
at org.hibernate.dialect.resolver.DialectFactory.constructDialect(DialectFactory.java:159)
at org.hibernate.dialect.resolver.DialectFactory.buildDialect(DialectFactory.java:99)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:117)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2863)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2859)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1870)
at com.aurodisplay.hibernate.HibernateTest.main(HibernateTest.java:17)
Caused by: java.lang.ClassNotFoundException: org.hibernate.dialect.MYSQLDialect
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192)
at org.hibernate.dialect.resolver.DialectFactory.constructDialect(DialectFactory.java:156)

有人可以帮我吗?

推荐答案

答案在问题中.您在jar文件中找到了MySQLDialect，但是您的配置文件尝试使用MYSQLDialect. Java区分大小写.

The answer is in the question. You've found MySQLDialect in your jar files, but your configuration file tries to use MYSQLDialect. Java is case-sensitive.

尝试更改为以下

<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

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