开发中 经常要在关键方法开始终了时 记录log日志 特别是方法名经常copy错误有没有

tomcat中提供了一个不错的方法不过StackTraceElement的数组下表要根据自己的需要修改了

当然宝宝之前用Thread.currentThread().getStackTrace()也是可以的 

 tomcat org.apache.juli.logging.DirectJDKLog

private void log(Level level, String msg, Throwable ex) {        if (logger.isLoggable(level)) {            // Hack (?) to get the stack trace.            Throwable dummyException=new Throwable();            StackTraceElement locations[]=dummyException.getStackTrace();            // Caller will be the third element            String cname = "unknown";            String method = "unknown";            if (locations != null && locations.length >2) {                StackTraceElement caller = locations[2];                cname = caller.getClassName();                method = caller.getMethodName();            }            if (ex==null) {                logger.logp(level, cname, method, msg);            } else {                logger.logp(level, cname, method, msg, ex);            }        }    }

testcase

package com.tomcatExt.startup;import java.util.Date;public class BootStart {//	public static void main(String[] args) {//		// TODO Auto-generated method stub//		HttpConnector connector = new HttpConnector();//		connector.start();//	}	public static void main(String[] args) {		BootStart test = new BootStart();				test.testName1();		test.testName2();	}		private void logStart(){		this.log("Start",null);	}	private void logEnd(){		this.log("End",null);	}		private void log(String msg,Throwable t){		Throwable throwable =new Throwable();		//StackTraceElement[] elements = Thread.currentThread().getStackTrace();//下标3				StackTraceElement[] elements = throwable.getStackTrace();//下标2				String strClassName = "unKnown";		String strMethodName = "unKnown";		String strLineNumber = "0";				if(elements.length>1){			strClassName = elements[2].getClassName();			strMethodName = elements[2].getMethodName();			strLineNumber = String.valueOf(elements[2].getLineNumber());		}				System.out.println(String.format("[Class:%1$s][Method:%2$s][Line:%3$s][Time:%4$s]:%5$s", 											strClassName,											strMethodName,											strLineNumber,											new Date(),											msg											));		if(t!=null){			t.printStackTrace();		}	}		private void testName1(){		this.logStart();		this.logEnd();	}	private void testName2(){		this.logStart();		this.testName2_1();		this.logEnd();	}	private void testName2_1(){		this.logStart();		this.testName2_1_2();		this.logEnd();	}	private void testName2_1_2(){		this.logStart();		this.logEnd();	}}

运行结果：

[Class:com.tomcatExt.startup.BootStart][Method:testName1][Line:53][Time:Fri Mar 03 18:44:44 CST 2017]:Start

[Class:com.tomcatExt.startup.BootStart][Method:testName1][Line:54][Time:Fri Mar 03 18:44:44 CST 2017]:End [Class:com.tomcatExt.startup.BootStart][Method:testName2][Line:57][Time:Fri Mar 03 18:44:44 CST 2017]:Start [Class:com.tomcatExt.startup.BootStart][Method:testName2_1][Line:62][Time:Fri Mar 03 18:44:44 CST 2017]:Start [Class:com.tomcatExt.startup.BootStart][Method:testName2_1_2][Line:67][Time:Fri Mar 03 18:44:44 CST 2017]:Start [Class:com.tomcatExt.startup.BootStart][Method:testName2_1_2][Line:68][Time:Fri Mar 03 18:44:44 CST 2017]:End [Class:com.tomcatExt.startup.BootStart][Method:testName2_1][Line:64][Time:Fri Mar 03 18:44:44 CST 2017]:End [Class:com.tomcatExt.startup.BootStart][Method:testName2][Line:59][Time:Fri Mar 03 18:44:44 CST 2017]:End