java log analyzer

The Java User Name is used to log on to the student information management system and add, delete, modify, and query the user name. Package zzzzzzzz; import java. io. *; public class Text {public static void main (String [] args) throws MyException, IOException {Login l = new Login (); l. login () ;}} class Student {private String stunumber; private String name;

GC log is a useful log of Java programs that best view issues when memory problems occur. Let's step through the GC log. First, the default Java program does not turn on GC log, we can add-xx:+printgcdetails to the JVM parameters

the original Nginx date data is: [28/nov/2014:11:56:09 +0800] need to replace []: timeLocal = [28/nov/2014:11:56:09 +0800] timelocal = Timelocal.replace ("[", "" ") Timelocal = Timelocal.replace ("] "," "); The following formats need to be noted: (1) must be 3 m (2) +0800 represents the time zone information, can be resolved with Z (3) must be Locale.english, if written Chinese will error simpledateformat Formatter = new SimpleDateFormat ("Dd/mmm/yyyy:hh:mm:ss Z", loca

open a file that does not exist3.trying to find the given stringClassObject,and this string represents a class that does not exist."if it appears runtimeexception Abnormal , then it must be your problem " is a fairly reasonable rule .It should be avoided by detecting whether array subscripts are out of boundsarrayindexoutofboundsexceptionException;This should be done by detecting whether the variables are empty before using them.NullPointerExceptionthe occurrence of an exception.Java language w

Filebeat.modules:-Module:kafkaLogEnabled:trueFilebeat.prospectors:-Type:logEnabled:truePaths-/opt/logs/jetty/xxx.logFieldsName:study_logsonlineType:javalogsonlineip_lan:xxx.xxx.xxx.xxIp_wan:xxx.xxx.xxx.xxxMultiline.pattern: ' ^\d{4}-\d{1,2}-\d{1,2}\s\d{1,2}:\d{1,2}:\d{1,2} 'Multiline.negate:trueMultiline.match:afterName:xxxxOutput.kafka:Enabled:trueHosts: ["kafka-1.xxx.com:9092", "kafka-2.xxx.com:9092", "kafka-3.xxx.com:9092"]Topic:xue_business_exception_logmax_message_bytes:1000000Setup.templat

Five layouts: Flow layout (flowlayout) boundary layout (borderlayout) grid layout (GridLayout) common three card layout (cardlayout) grid package layouts (gridbaglayout) Two types of JFrame that are not commonly used Form (default BorderLayout layout) JPanel panel (default flowlayout layout) JButton button Jradiobutton Radio box (be sure to place a single selection in Buttongroup to form mutual exclusion) Jcheckbox check box JLabel label JTextField text box JTextArea multiline text field (must b

Ping-Pong Maniac-Tutorial:Jdk-logging, LOG4J, Logback Journal Introduction and PrincipleIntegration principle of commons-logging and jdk-logging, Log4j1, Log4j2 and LogbackIntegration principle of slf4j and jdk-logging, Log4j1, Log4j2 and LogbackSLF4J, JCL, Jul, log4j1, log4j2, Logback big SummaryOffline Version: (Link: https://pan.baidu.com/s/1hrBOojM password: pxaq)Java log framework using Skill collectio

, priority, [class name], log information, line breaklog4j.appender.r.layout.conversionpattern=%n%n%d%p[%c]-%m%n Step three: Define the Log class Log.java PackageCom.kyny.weather.log;ImportOrg.apache.log4j.Logger;ImportOrg.apache.log4j.PropertyConfigurator;/*** Log class *@authorZhoucan **/ Public classLog {//Logger Instances PublicLogger Logger =NUL

Log Level Java.util.log.Level Java will log is a relatively simple object, only three properties, Name,value,resourcebundlename, representing the name of the log, value and resource file name, the log is divided into the following 6 levels, the six levels in the level of sta

Reference: http://sunnylocus.iteye.com/blog/694666 Recently, there is a bank data bleaching system, requiring operators to call the shell of the remote Linux server on the page, and to save the shell output to a log file, the front page to display the contents of the log file in real time. The problem is how to tell which data is new, by looking at the JDK Help document, Java.io.RandomAccessFilecan solve th

following code implementation: Static Private class Lock {};p rivate lock lock = new Lock ();p ublic referenceextends t> r = Reallypoll (); if (r! = null) return R; for (;;) {lock.wait (timeout); r = Reallypoll ();...... }} That is, in the execution of a thread, the Monitor of this object is first obtained with synchronized (corresponding tolocked ); When executing to lock.wait (timeout), the thread discards the ownership of Monitor and enters the "Wait Set" queue (corresponding to theWaiti

-coreArtifactid> Exclusions> exclusion> Artifactid>commons-loggingArtifactid> groupId>commons-logginggroupId> exclusion> Exclusions> Dependency> Logback.xml XML version= "1.0" encoding= "UTF-8"?> ConfigurationScan= "true"Scanperiod= "Seconds">Appendar Explanation: Http://logback.qos.ch/manual/appenders.html#RollingFileAppender -Appendername= "FILE"class= "Ch.qos.logback.core.rolling.RollingFileAppender">Current log file name -file>Ldap-pwd.logfile>

Add dependencies in the pom.xml of the MAVEN project: SLF4J is a collection of interfaces that are not responsible for specific log implementations and are only responsible for finding the appropriate log system for binding at compile time. Specifically what interfaces, all defined in Slf4j-api. SLF4J-LOG4J12 is the adapter that links the middle

framework, write the Setup,teatdown,run method code to run at least once, no problem do the following, export the executable jar package from Eclipse, for JMeter call project right-clickThis is the exported executable jar package and the dependent package folderImport these 2 files into the following directory, JMeter expansion pack, each script has a separate folder, storage dependent package Restart JMeter, new Java requestClick Run, the database h

The Slf4 log can open it in a way that supports annotations, and then uses the placeholder directly when it is used, without having to manually stitch strings, which is the best performance.A build.gradle dependency Compileonly (' Org.projectlombok:lombok ')Second, add annotations for class@Slf4j Public class Loggerdemo { publicvoid Test () { = Userinfo.builder (). Name ("Zzl"). Email ("[email protected]"). Build (); Log.debug ("{} format

log4j package, and then build a Java file Testlog4j.java under the package, the code is as follows: Package log4j; Import Org.apache.log4j.Logger; public class Testlog4j {public void log4j () {Logger Log=logger.getlogger (This.getclass (). GetName ());System.out.println ("Test log4j");Log.fatal ("testlog4j + Bonze");}public static void Main (string[] args) {testlog4j tl=new testlog4j ();Tl.log4j ();}} Run,

Write the log file through Java, the implementation of line wrapping: Provides methods for writing log files: /*** Write log file* @param string* @param file*/public static void Writelogfile (string string, file file) {FileWriter FW = NULL;try {FW = new FileWriter (file);Fw.write (string);catch (IOException e) {E.pri

(' Z ', 2) and indexOf (' Z ', 3) return 5, First, indexOf (' Z ', 2) 2 represents thestring 3rd [Note that it is 3, it has skipped the first z] character to start looking for the ' z ' character, find the position where the ' Z ' character is returned, please note thatThe number of positions returned at this time [you are 5] is also counted from the 0 position. So indexof (' Z ', 3) found the Z also andIndexOf (' Z ', 2) The position of z found is the same.For example:String s = "

MimeMessage object. AMimeMessage message =NewMimeMessage (session); at - //Set from:header field of the header. -Message.setfrom (Newinternetaddress (from)); - - //Set to:header field of the header. - message.addrecipient (Message.RecipientType.TO, in Newinternetaddress (to)); - to //Set subject:header Field +Message.setsubject ("This is the Subject line!"); - the //Now set the actual message *Message.settext ("This is actual message