Java错误“未找到指定的JDBC驱动程序com.microsoft.sqlserver.jdbc.SQLServerDriver类”

Question

运行应用程序时出错，错误是：

未找到指定的JDBC驱动程序com.microsoft.sqlserver.jdbc.SQLServerDriver类

我的灵魂: pom.xml

    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-convention-plugin</artifactId>
        <version>2.3.20</version>
    </dependency>
    <dependency>
        <groupId>org.apache.struts</groupId>
        <artifactId>struts2-rest-plugin</artifactId>
        <version>2.3.20</version>
    </dependency> 

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>4.2.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate.common</groupId>
        <artifactId>hibernate-commons-annotations</artifactId>
        <version>4.0.1.Final</version>
        <classifier>tests</classifier>
    </dependency>
    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>1.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.0.0.GA</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.4</version>
    </dependency>
    <dependency>
        <groupId>org.jboss.logging</groupId>
        <artifactId>jboss-logging</artifactId>
        <version>3.1.0.CR2</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.6.4</version>
    </dependency>

    <dependency>
        <groupId>com.microsoft.sqlserver.jdbc</groupId>
        <artifactId>sqljdbc4</artifactId>
        <version>1.0</version>
        <scope>system</scope>
        <systemPath>${basedir}/src/main/lib/sqljdbc4.jar</systemPath>
    </dependency>

hibernate.cfg.xml

<hibernate-configuration>     
<session-factory> 

 <!-- Database connection settings -->  
    <property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>  
    <property name="connection.url">jdbc:sqlserver://.;database=db</property>  
    <property name="connection.username">sa</property>  
    <property name="connection.password">12345</property>   
    <property name="connection.pool_size">1</property>   
    <property name="dialect">org.hibernate.dialect.SQLServer2005Dialect</property>   
    <property name="show_sql">false</property>   
    <property name="hbm2ddl.auto">update</property>  

    <!-- Mapping files --> 
    <mapping resource="employee.hbm.xml"/> 

</session-factory> 

调用Hibernate的代码：

public static List<Employee> SelectAll(){ 
    Configuration cfg = new Configuration();  
    cfg.configure("hibernate.cfg.xml");
    SessionFactory factory = cfg.buildSessionFactory();  
    Session session = factory.openSession(); 

    //String sql_query= "from Employee where Name = 'Kevin'";
    String sql_query= "from Employee";
    Query query = session.createQuery(sql_query);
    List<Employee> employees = query.list();

    session.close();  
    factory.close(); 
    return employees;
}

有人知道为什么吗？在SessionFactory factory =cfg.buildSessionFactory()中发生了错误；

目录在：

​

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当我检查库时，它有SQLServerDriver

​

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Answer 1

@Lumanyun您使用的是存储库Maven中不存在的jar：

<dependency>
        <groupId>com.microsoft.sqlserver.jdbc</groupId>
        <artifactId>sqljdbc4</artifactId>
        <version>1.0</version>
        <scope>system</scope>
        <systemPath>${basedir}/lib/sqljdbc4.jar</systemPath>
    </dependency>

去检查这里，一个可以帮助您的版本

Answer 2

这是因为类路径中没有com.microsoft.sqlserver.jdbc.SQLServerDriver。

请检查类路径中的sqljdbc4.jar并检查sqljdbc4.jar中的com.microsoft.sqlserver.jdbc.SQLServerDriver类。

若要使用SQLServerDriver查找类路径中的任何jar，请尝试在Hibernate配置代码之前执行此代码。

URL driverUrl = Thread.currentThread().getContextClassLoader()
    .getResource(
    "com/microsoft/sqlserver/jdbc/SQLServerDriver.class");
System.out.println(driverUrl);

Answer 3

请检查你的类路径。司机罐必须在类路径上。此问题与java无法在指定的类路径中找到类有关。将jar文件放在同一个目录中，否则就可以找到它。