在m% 或者 t% 等出现需要转义字符时处理

实例：

package com.yss.util;

import org.apache.log4j.Category;
import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.jdbc.JDBCAppender;
import org.apache.log4j.spi.LoggingEvent;

public class ReJDBCAppender extends JDBCAppender {

	protected String getLogStatement(LoggingEvent event) {
		String fqnOfCategoryClass = event.fqnOfCategoryClass;
		Category logger = Logger.getRootLogger();
		Priority level = event.getLevel();
		Object message = event.getMessage();
		Throwable throwable = null;
		ReLoggingEvent bEvent = new ReLoggingEvent(fqnOfCategoryClass, logger,
				level, message, throwable);
		return super.getLogStatement(bEvent);
	}
}

package com.yss.util;

import org.apache.log4j.Category;
import org.apache.log4j.Priority;
import org.apache.log4j.spi.LoggingEvent;

public class ReLoggingEvent extends LoggingEvent {
	private static final long serialVersionUID = 1L;

	public ReLoggingEvent(String fqnOfCategoryClass, Category logger,
			Priority level, Object message, Throwable throwable) {
		super(fqnOfCategoryClass, logger, level, message, throwable);
	}

	/**
	 * 线程名单引号做处理
	 */
	public String getThreadName() {   
        String thrdName=super.getThreadName();   
        if(thrdName.indexOf("'")!=-1){   
            thrdName=thrdName.replaceAll("'", "''");   
        }   
        return thrdName;   
    }   

	/** 
	 * 对插入的message中包含的单引号(')做处理
	 * @see org.apache.log4j.spi.LoggingEvent#getRenderedMessage()
	 */
	public String getRenderedMessage() {
		String renderedMessage = super.getRenderedMessage();
		//插入的message中包含(')单引号需要处理
		if(renderedMessage.indexOf("'")!=-1)
			renderedMessage=renderedMessage.replaceAll("'", "''");
		return renderedMessage;
	}
}

配置：

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} %5p [%c]- %m%n

### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.RollingFileAppender
#log4j.appender.file.File=reportLog.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss,SSS} %5p [%c]- %m%n
#log4j.appender.file.MaxFileSize=5MB
#log4j.appender.file.MaxBackupIndex=2

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info,stdout,db

#log4j.logger.business=INFO,db  
#log4j.appender.db=com.neam.commons.MyJDBCAppender   
log4j.appender.db=com.yss.util.ReJDBCAppender
  
log4j.appender.db.BufferSize=1
log4j.appender.db.driver=${com.yss.db.driverClassName}
log4j.appender.db.URL=${com.yss.zt.url}
log4j.appender.db.user=${com.yss.zt.username}
log4j.appender.db.password=${com.yss.zt.password}
log4j.appender.db.sql=insert into RP_REPORTLOG(FLOW,USERNAME,REPORTCODE,REPORTDATE,LOGLEVEL,LOGMSG ,JCLASS ,JMETHOD ,ERRORTIME ) values (REPORTLOG.nextval,'%X{userName}','%X{reportCode}','%X{reportDate}','%p','%m','%M','%C','%d{yyyy-MM-dd HH:mm:ss}')
log4j.appender.db.layout=org.apache.log4j.PatternLayout

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource 
#log4j.logger.org.hibernate.jdbc=debug