java 如何解决“找不到方言类:”异常?

y4ekin9u  于 2023-02-11  发布在  Java
关注(0)|答案(3)|浏览(156)

我对休眠很陌生,所以我正在通过看视频教程来练习。我下面的链接是,
https://www.youtube.com/watch?v=FFMOZY4z6bE&list=PL4AFF701184976B25&index=5
这是Eclipse中的一个简单的Java项目。这里我使用MySQL数据库。这是我的Hibernate.cfg.xml文件,
驱动程序jdbc:mysql://本地主机:3306/休眠数据库根根

<!-- 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"/>

我得到了这样的错误,

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)

有人能帮我一下吗。

sbdsn5lh

sbdsn5lh1#

如果使用的是属性文件,请确保行尾没有空格。

hibernate.dialect=org.hibernate.dialect.MySQLDialect
vsmadaxz

vsmadaxz2#

答案就在问题中,您在jar文件中找到了MySQLDialect,但是您的配置文件试图使用MYSQLDialect
尝试更改为以下

<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
s2j5cfk0

s2j5cfk03#

如果您正在使用

<org.hibernate.dialect.MySQL8Dialect</property>

只需从那里删除8

<org.hibernate.dialect.MySQLDialect</property>

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