我开发了一个应用程序,用于使用JDBCAppender将日志记录到数据库log4j2.xml中。我在此处遵循以下指令: - http://self-learning-java-tutorial.blogspot.in/2015/10/log4j2-jdbcappender-write-log-messages.html
我的DB ConnectionFactory类如下所示: -来自共享库jar的类未找到
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.commons.dbcp.DriverManagerConnectionFactory;
import org.apache.commons.dbcp.PoolableConnection;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.PoolingDataSource;
import org.apache.commons.pool.impl.GenericObjectPool;
public class ConnectionFactory {
private static interface Singleton {
final ConnectionFactory INSTANCE = new ConnectionFactory();
}
private final DataSource dataSource;
private ConnectionFactory() {
Properties properties = new Properties();
properties.setProperty("user", "sa");
properties.setProperty("password", "[email protected]"); // or get properties from some configuration file
GenericObjectPool<PoolableConnection> pool = new GenericObjectPool<PoolableConnection>();
DriverManagerConnectionFactory connectionFactory = new DriverManagerConnectionFactory(
"jdbc:sqlserver://SERV1-PC\\SQLEXPRESS:1433;databaseName=Anirban;", properties
);
new PoolableConnectionFactory(
connectionFactory, pool, null, "SELECT 1", 3, false, false, Connection.TRANSACTION_READ_COMMITTED
);
this.dataSource = new PoolingDataSource(pool);
}
public static Connection getDatabaseConnection() throws SQLException {
return Singleton.INSTANCE.dataSource.getConnection();
}
}
和我log4j2.xml摘录如下: -
<Appenders>
<JDBC name="databaseAppender" tableName="LogTable">
<ConnectionFactory class="ConnectionFactory" method="getDatabaseConnection" />
<Column name="EVENT_DATE" isEventTimestamp="true" />
<Column name="LEVEL" pattern="%level" />
<Column name="LOGGER" pattern="%logger" />
<Column name="MESSAGE" pattern="%message" />
<Column name="THROWABLE" pattern="%ex{full}" />
</JDBC>
</Appenders>
<AsyncRoot level="INFO" >
<AppenderRef ref="databaseAppender" />
</AsyncRoot>
现在一切正常,我可以看到在日志中DB。
但是,当我将该项目导出为jar文件以使其成为公用共享库jar并在其他应用程序中用作依赖项时,遇到了ClassNotFoundException。
所以,每当我开始有这个共享的jar文件的依赖应用程序,我得到如下: -
ERROR java.lang.ClassNotFoundException: ConnectionFactory java.lang.ClassNotFoundException: ConnectionFactory
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)
我一个不知道为什么这ConnectionFactory的java类没有进入类路径中共享jar,但是当它作为上面提到的应用程序运行时工作正常。
请问如何在jar包中的classpath中包含ConnectionFactory java类?那么我需要在log4j2.xml中进行修改吗?
另外,使用默认包是一种不好的做法。但是,您没有向我们展示整个ConnectionFactory.java文件,因此可能您_have_声明了一个包,这可能是您遇到问题的原因。 – rmlan
我同意默认包是一个不好的做法。我正在做一个POC,我实际上将java包从一个包转换为默认值。反正这是整个JAVA代码粘贴 –
编辑粘贴代码 –