log4j示例

     试用了下log4j，以下是一个简单的示例：

 

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import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.Properties;

import org.apache.log4j.Level;

import org.apache.log4j.Logger;

import org.apache.log4j.PropertyConfigurator;

public class Test {

private static Logger logger = Logger.getLogger(Test.class);

/**

 * @param args

 */

public static void main(String[] args) {

// TODO Auto-generated method stub

Test test = new Test();

// 在操作系统上java运行的绝对路径

String path = "E:/SrcCode/java";

// 初始化

try{

test.initLog4j(path);

}

catch (Exception e)

{

}

logger.info("1");

logger.fatal("2");

logger.error("3");

logger.warn("4");

}

public void init(String path) throws Throwable

{

// 配置log4j信息

initLog4j(path);

}

private void initLog4j(String path) throws Exception

{

// 读取配置文件

Properties p = readConfFile(path + "/conf/log4j.properties");

// 重新定义日志文件名

// String fileItemKey = "log4j.appender.LOGFILE.File";

// String fileItemValue = path + "/log/SRP_SendF_" + processId + ".log";

// p.setProperty(fileItemKey, fileItemValue);

/**

 * CR_DG_20100916_1177682 全省需求---功能优化专题需求（三）

 * 服务开通进程增加日志动态控制

 * 2011-02-17 modif by gkf38625

 */

p.setProperty("log4j.rootCategory", "ALL,CONSOLE,LOGFILE");

String logFileThreshold = p.getProperty("log4j.appender.LOGFILE.Threshold");

p.setProperty("log4j.appender.LOGFILE.Threshold", "ALL");

PropertyConfigurator.configure(p);

//将日志文件输出级别设置为配置文件初始值，从根上控制

Logger.getRootLogger().setLevel(Level.toLevel(logFileThreshold));

}

/**

 * @return

 * @throws ExitException

 */

private Properties readConfFile(String fileName) throws Exception

{

Properties p = new Properties();

FileInputStream fs = null;

try

{

fs = new FileInputStream(fileName);

// 读入配置文件内容

p.load(fs);

}

catch (FileNotFoundException e)

{

logger.fatal("读取配置信息出错:没有找到文件:" + fileName + " " + e.toString());

// 没有找到配置文件，进程只能退出

throw new Exception("读取配置信息出错:没有找到文件" + fileName);

}

catch (IOException e)

{

logger.fatal("读取配置信息出错:" + fileName + " " + e.toString());

// 读取配置文件出错，进程只能退出

throw new Exception("读取配置信息出错:没有找到文件" + fileName);

}

finally

{

// 释放文件句柄

if (null != fs)

{

try

{

fs.close();

}

catch (IOException e)

{

// TODO 自动生成 catch 块

e.printStackTrace();

}

}

fs = null;

}

return p;

}

}