log4j日志输入到数据库，找不到mysql 驱动

log4j.rootLogger=DEBUG,DATABASE,A1
log4j.addivity.org.apache=true 


log4j.appender.DATABASE=org.apache.log4j.jdbc.JDBCAppender 
log4j.appender.DATABASE.URL=jdbc:mysql://localhost:3306/demo/ 
log4j.appender.DATABASE.driver=com.mysql.jdbc.Driver 
log4j.appender.DATABASE.user=root 
log4j.appender.DATABASE.password=000000
log4j.appender.DATABASE.sql=INSERT INTO LOG4J (Message) VALUES ('[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n') 
log4j.appender.DATABASE.layout=org.apache.log4j.PatternLayout 
log4j.appender.DATABASE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n 



log4j:ERROR Failed to load driver
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.apache.log4j.jdbc.JDBCAppender.setDriver(JDBCAppender.java:351)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.log4j.config.PropertySetter.setProperty(PropertySetter.java:205)
at org.apache.log4j.config.PropertySetter.setProperty(PropertySetter.java:164)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:129)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:96)
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:654)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612)
at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:509)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:415)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:441)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:468)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:122)
at org.apache.log4j.Logger.getLogger(Logger.java:116)
at com.demo.gyl.Main.<clinit>(Main.java:9)
collectionRemovals=[] collectionUpdates=[]])
Hibernate: insert into person (name, password, age, id) values (?, ?, ?, ?)//这里明明已经把数据写数据库了。

错误原因：是由于log4j里面里面配置数据库DATABASE这里每条配置信息后面  有空格 ，去掉空格，就能找到驱动。
解决方法：去掉log4j里面关于DATABASE配置的每个属性，后面把空格去掉，程序就会找到mysql的jar包了