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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ###一.數據庫驅動問題 log4j:WARN?No?appenders?could?be?found?for?logger?(org.hibernate.cfg.Environment). log4j:WARN?Please?initialize?the?log4j?system?properly. Exception?in?thread?"main"?org.hibernate.HibernateException:?JDBC?Driver?class?not?found:?com.microsoft.sqlserver.jdbc.SQLServerDriver at?org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:89) at?org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137) at?org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79) at?org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:425) at?org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89) at?org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119) at?org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115) at?org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339) at?com.test.Test.main(Test.java:17) Caused?by:?java.lang.ClassNotFoundException:?com.microsoft.sqlserver.jdbc.SQLServerDriver at?java.net.URLClassLoader$1.run(URLClassLoader.java:200) at?java.security.AccessController.doPrivileged(Native?Method) at?java.net.URLClassLoader.findClass(URLClassLoader.java:188) at?java.lang.ClassLoader.loadClass(ClassLoader.java:307) at?sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at?java.lang.ClassLoader.loadClass(ClassLoader.java:252) at?java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at?java.lang.Class.forName0(Native?Method) at?java.lang.Class.forName(Class.java:169) at?org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:192) at?org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:84) ...?8?more 解決: (1)找不到這個jar包,你確定導入了嗎?web項目的話放到WEB-INF下的lib目錄,java項目的話需要add?to?build?path。 (2)你找找看你這個jar包里面有沒有com.microsoft.sqlserver.jdbc.SQLServerDriver這個類,沒有的話就是jar包不對。 (3)看清楚 有的jar包是com.microsoft.sqlserver.jdbc.SQLServerDriver有的jar包是com.microsoft.jdbc.sqlserver.SQLServerDriver 下載地址:[點擊打開鏈接](http://download.csdn.net/detail/sunnyyoona/7791983) ### 二 .AnnotationConfiguration問題 問題:AnAnnotationConfiguration instance is required to use <mappingclass="com.model.TeacherInfo"/> 最近學習Hibernate,嘗試使用XML和Annotation兩種方式進行POJO類的映射,有兩個類:Student和Teacher,前者使用XML文件來映射類和屬性,后者使用Annotation映射類和屬性,并放在一個工程下。Hibernate的配置文件——hibernate.cfg.xml位于src目錄下。在單元測試時,執行下面代碼時,會產生異常。 ~~~ Configuration cfg = new Configuration(); SessionFactory sf = cfg.configure().buildSessionFactory(); ~~~ 異常信息為:org.hibernate.MappingException: An AnnotationConfiguration instance is required to use <mapping class="com.model.TeacherInfo"/> 原因分析: Hibernate配置文件中,若帶有<mapping class="com.model.TeacherInfo"/>,則說明映射類時,采用了Annotation方式。在初始化Configuation時,應使用AnnoationConfiguration,代碼如下: ~~~ Configuration cfg = new AnnoationConfiguration(); SessionFactory sf = cfg.configure().buildSessionFactory(); ~~~ 如果,你在映射時,未使用過Annotation,則使用Configuration。
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