log4j 具体应用(续)

现在需求发生改变,要求记录下类中状态信息,做成报表,也就是现在有两个日志文件gasturbine.log1和gasturbine.log2,前者用于显示debug信息,后者用于专门显示状态信息,如果仅用一个logger很难搞定,因为一个logger虽然可以对应多个配置文件以及不同的格式,但每个文件显示的内容是一样,现在要求是两个文件的内容不一样,所以考虑采用两个logger

step1)修改先前的配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<appender name="appender1" class="org.apache.log4j.FileAppender">
<param name="File" value="gasturbine.log1.txt"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %p - %m%n"/>
</layout>
</appender>

<appender name="appender2" class="org.apache.log4j.FileAppender">
<param name="File" value="gasturbine.log2.txt"/>
<param name="Append" value="false"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%m%n"/>
</layout>
</appender>

<logger name="component" additivity="false">
<level value="info"/>
<appender-ref ref="appender2"/>
</logger>

<root>
<level value ="debug"/>
<appender-ref ref="appender1"/>
<!--appender-ref ref="appender2"/-->
</root>

</log4j:configuration>

step2) 修改logger的封装类

/*
* Created on 2005-4-23
*
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
*/
package gasturbine.model.util;

import org.apache.log4j.Logger;
import org.apache.log4j.xml.DOMConfigurator;

/**
* @author Pw
*
*
*/
public class SysLog {
static Logger logger = Logger.getRootLogger();
static Logger infologger=Logger.getLogger("component");

static {
DOMConfigurator.configure("classes/log4j.xml");
}

public static void debug(Object o) {
logger.debug(o);

}

public static void debug(double d) {
logger.debug(""+d);

}
public static void info(Object o) {
infologger.info(o);

}

public static void info(double d) {
infologger.info(""+d);

}

}

step3 )调用SysLog .info

代码片断:

private void titleLog() {

sb.append(SimLog.format("denA0"));
sb.append(SimLog.format("denV0"));
sb.append(SimLog.format("T0"));
sb.append(SimLog.format("u0"));

SysLog.info(sb.toString());
sb.delete(0, sb.length());
}

附上显示结果

gasturbine.log1.txt的部分内容

2005-04-23 19:09:19,921 [main] DEBUG - ========第0次循环开始========
2005-04-23 19:09:19,921 [main] DEBUG - ===step 1 从环境中取出计算所需变量===
2005-04-23 19:09:19,953 [main] DEBUG - 入口湿空气流量:58.14 kg/s
2005-04-23 19:09:19,953 [main] DEBUG - 出口湿空气流量:70.0 kg/s
2005-04-23 19:09:19,953 [main] DEBUG - 入口湿空气温度:293.0 K
2005-04-23 19:09:19,953 [main] DEBUG - 出口湿空气温度:300.0 K
2005-04-23 19:09:19,953 [main] DEBUG - 入口湿空气压力:1913300.0 Pa
2005-04-23 19:09:19,953 [main] DEBUG - 出口湿空气压力:1713300.0 Pa
2005-04-23 19:09:19,953 [main] DEBUG - 入口湿空气含湿量:0.2 g/kg
2005-04-23 19:09:19,953 [main] DEBUG - 出口湿空气含湿量:0.6 g/kg
...................................

gasturbine.log2.txt的部分内容

denA0 denV0 T0
22.636187739301306 9.867221190297283 0.004528142995369833
21.537187939373213 18.5678478393985730.004357757597157780
.................................