log4jdbc日志框架

现大家使用的ibatis,hibernate,spring jdbc的sql日志信息，有一点个缺点是占位符与参数是分开打印的,如果想要拷贝sql至PLSQL Developer客户端直接执行，需要自己拼凑sql。而log4jdbc是在jdbc层的一个日志框架，可以将占位符与参数全部合并在一起显示，方便直接拷贝sql在PLSQL Developer等客户端直接执行，加快调试速度

一.简单介绍：

1.没有使用log4jdbc前sql显示:

select username,password from bitth_date > ? and age < ? and username = ? 

 2.使用log4jdbc后sql显示:

select username,password from bitth_date > to_date(‘2010-11-11’,’yyyy-mm-dd’) and age < 20 and username = ‘qq2008’ {executed in 2 msec} 

 这样就可以直接拷贝上面的sql在PLSQL直接执行. 最后的 {executed in 2 msec} 为SQL执行时间.而如果mysql,日志信息将不会出现 to_date()

 二.log4jdbc使用：

1.spring xml配置（拦截需要处理的dataSource连接）

<bean id="log4jdbcInterceptor" class="net.sf.log4jdbc.DataSourceSpyInterceptor" /><bean id="dataSourceLog4jdbcAutoProxyCreator" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"><property name="interceptorNames"><list><value>log4jdbcInterceptor</value></list></property><property name="beanNames"><list><value>dataSource</value></list></property></bean>

DataSourceSpyInterceptor是一个拦截器类,扩展主要是使用AOP的方式。具体源码为:

/**实现方法拦截器*/public class DataSourceSpyInterceptor implements MethodInterceptor{private RdbmsSpecifics rdbmsSpecifics = null;private RdbmsSpecifics getRdbmsSpecifics(Connection conn){if (this.rdbmsSpecifics == null)this.rdbmsSpecifics = DriverSpy.getRdbmsSpecifics(conn);return this.rdbmsSpecifics;}public Object invoke(MethodInvocation invocation) throws Throwable{Object result = invocation.proceed();if (SpyLogFactory.getSpyLogDelegator().isJdbcLoggingEnabled() && (result instanceof Connection)){Connection conn = (Connection)result;return new ConnectionSpy(conn, getRdbmsSpecifics(conn));}return result;}}

 MySql日期处理:

class MySqlRdbmsSpecifics extends RdbmsSpecifics{MySqlRdbmsSpecifics(){super();}String formatParameterObject(Object object){if (object instanceof java.sql.Time){return "'" + new SimpleDateFormat("HH:mm:ss").format(object) + "'";}else if (object instanceof java.sql.Date){return "'" + new SimpleDateFormat("yyyy-MM-dd").format(object) + "'";}else if (object instanceof java.util.Date) // (includes java.sql.Timestamp){return "'" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(object) + "'";}else{return super.formatParameterObject(object);}}}

Oracle日期处理

class OracleRdbmsSpecifics extends RdbmsSpecifics{OracleRdbmsSpecifics(){super();}String formatParameterObject(Object object){if (object instanceof Timestamp){return "to_timestamp('" + new SimpleDateFormat("MM/dd/yyyy HH:mm:ss.SSS").format(object) + "', 'mm/dd/yyyy hh24:mi:ss.ff3')";}else if (object instanceof Date){return "to_date('" + new SimpleDateFormat("MM/dd/yyyy HH:mm:ss").format(object) + "', 'mm/dd/yyyy hh24:mi:ss')";}else{return super.formatParameterObject(object);}}}

2.log4j.properties配置:

log4j.rootLogger=INFO,stdout,R_ERRORlog4j.logger.asyncAppenders=INFO,stdout,logfileWarnlog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.Target=System.outlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=[%p] [%d{yyyy-MM-dd HH:mm:ss}] [%c:%L] - %m%n#log4jdbc configlog4j.logger.jdbc.sqlonly=OFFlog4j.logger.jdbc.sqltiming=INFOlog4j.logger.jdbc.audit=OFFlog4j.logger.jdbc.resultset=OFFlog4j.logger.jdbc.connection=OFF#log4jdbc config endlog4j.logger.org.springframework.beans.factory.support.DefaultListableBeanFactory=ERROR,logfileWarnlog4j.logger.org.springframework.web.servlet.DispatcherServlet=ERROR,logfileWarnlog4j.logger.org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping=ERROR,logfileWarnlog4j.logger.com.shareinfo=DEBUG,logfileWarn#hibernatelog4j.logger.org.hibernate.SQL=DEBUGlog4j.logger.org.hibernate.type=ERROR#mybatislog4j.logger.com.ibatis=DEBUGlog4j.logger.org.apache.ibatis.jdbc.ScriptRunner=DEBUGlog4j.logger.org.mybatis.spring=INFOlog4j.logger.org.apache.ibatis=DEBUG,stdoutlog4j.appender.logfileWarn=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.logfileWarn.File=${catalina.base}/logs/warn.loglog4j.appender.logfileWarn.DatePattern='.'yyyy-MM-dd-HHlog4j.appender.logfileWarn.layout=com.netflix.logging.log4jAdapter.NFPatternLayoutlog4j.appender.logfileWarn.Append=truelog4j.appender.logfileWarn.layout.ConversionPattern=[%p -> %c:%L] %d{yyyy-MM-dd HH:mm:ss} %m%nlog4j.appender.logfileWarn.Threshold=DEBUGlog4j.appender.R_ERROR=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.R_ERROR.Threshold=ERRORlog4j.appender.R_ERROR.File=${catalina.base}/logs/error.loglog4j.appender.R_ERROR.Append=truelog4j.appender.R_ERROR.DatePattern='.'yyyy-MM-ddlog4j.appender.R_ERROR.layout=com.netflix.logging.log4jAdapter.NFPatternLayoutlog4j.appender.R_ERROR.layout.ConversionPattern=[%p -> %c:%L] %d{yyyy-MM-dd HH:mm:ss} %m%nlog4j.logger.java.sql.Connection=DEBUGlog4j.logger.java.sql.Statement=DEBUGlog4j.logger.java.sql.PreparedStatement=DEBUGlog4j.logger.java.sql.ResultSet=DEBUG

(日志信息如果全部为off,log4jdbc将不会生效,因此对性能没有任何影响) log4jdbc需要依赖slf4j日志框架

说明:本人于ITEYE创建于2014年,现转移到CSDN