log4jdbc：NoClassDefFoundError：无法找到Log4j2作为默认日志记录库。请提供日志记录库/配置有效的spyLogDelegator

Question

我已经编写了一个示例程序来加载“ net.sf.log4jdbc.sql.jdbcapi.DriverSpy”类，如下面的代码所示。 而且我也如下更新pom

<dependency>
    <groupId>org.bgee.log4jdbc-log4j2</groupId>
    <artifactId>log4jdbc-log4j2-jdbc3</artifactId>
    <version>1.12</version>
    <scope>compile</scope>
</dependency>

示例代码

String driverClassName = "net.sf.log4jdbc.sql.jdbcapi.DriverSpy";

        try
        {
            Class.forName(driverClassName);
        }
        catch (Exception t)
        {


            System.out.println(t.getStackTrace());


        }

log4j属性文件

 log4j.rootLogger=INFO,FILE

    ! Log connection open/close events and connection number dump
    log4j.logger.jdbc.connection=FATAL,connection
    log4j.additivity.jdbc.connection=false

    log4jdbc.spylogdelegator.name=net.sf.log4jdbc.log.slf4j.Slf4jSpyLogDelegator

    ! the appender used for the JDBC Connection open and close events
    log4j.appender.connection=org.apache.log4j.FileAppender
    log4j.appender.connection.File=/home/nirmala/projects/connection.log
    log4j.appender.connection.Append=false
    log4j.appender.connection.layout=org.apache.log4j.PatternLayout
    log4j.appender.connection.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %m%n

出现以下错误。

Exception in thread "main" java.lang.NoClassDefFoundError: Unable to find Log4j2 as default logging library. Please provide a logging library and configure a valid spyLogDelegator name in the properties file.
        at net.sf.log4jdbc.log.SpyLogFactory.loadSpyLogDelegator(SpyLogFactory.java:94)
        at net.sf.log4jdbc.Properties.<clinit>(Properties.java:203)
        at net.sf.log4jdbc.log.SpyLogFactory.getSpyLogDelegator(SpyLogFactory.java:69)
        at net.sf.log4jdbc.sql.jdbcapi.DriverSpy.<clinit>(DriverSpy.java:133)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:195)
        at org.apache.commons.dbcp.Main.main(Main.java:11)