Log4j进行日志的数据库持久化，说SQL语法错误。。。
在properties的配置中。。。。
log4j.appender.db = org.apache.log4j.jdbc.JDBCAppender
log4j.appender.db.BufferSize=1
log4j.appender.db.driver=com.mysql.jdbc.Driver
log4j.appender.db.URL=jdbc:mysql://localhost:3306/home
log4j.appender.db.user=root
log4j.appender.db.password=123323
log4j.appender.db.sql=insert into RESLOG (LogMSG) values (%m)
log4j.appender.db.layout=org.apache.log4j.PatternLayout
以下是控制台的错误内容：
log4j:ERROR Failed to excute sql
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WebApplicationContext: initialization started)' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:377)
at com.mysql.jdbc.Util.getInstance(Util.java:360)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:978)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3823)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2526)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1618)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1549)
at org.apache.log4j.jdbc.JDBCAppender.execute(JDBCAppender.java:218)
at org.apache.log4j.jdbc.JDBCAppender.flushBuffer(JDBCAppender.java:289)
at org.apache.log4j.jdbc.JDBCAppender.append(JDBCAppender.java:186)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
at org.apache.log4j.Category.callAppenders(Category.java:206)
at org.apache.log4j.Category.forcedLog(Category.java:391)
at org.apache.log4j.Category.log(Category.java:856)
at org.apache.commons.logging.impl.Log4JLogger.info(Log4JLogger.java:199)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:273)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5221)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3821)
at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1306)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1289)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1473)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:280)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1141)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1377)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1349)
at java.lang.Thread.run(Thread.java:744)
我用的是mysql5.6，难道是jar包问题，还是啥原因，求解！！
------解决思路----------------------
https://svn.apache.org/repos/asf/logging/log4j/trunk/src/main/java/org/apache/log4j/jdbc/JDBCAppender.java
当然，最好的办法就是继承这个类把它的 flushBuffer() 方法中那个操作数据库的地方：
String sql = getLogStatement(logEvent);
execute(sql);
改成：
PreparedStatement stmt = conn.prepareStatement(getSql());
stmt.setString(1, getLayout().format(loggingEvent);
stmt.executeUpdate();
注意这是假设我们的 SQL 语句将会是，类似下面这样，留下一个参数位给 msg 本身：
insert into tableName(..., ?)
)