how to read log file in java code

There are several common methods to read and write files:1. Byte read/write (InputStream/OutputStream) and character read (FileReader/FileWriter)FileInputStream's read (buffer) method, each time from the source program file OpenFile.

To generate a File object: FileName File = new file (GetClass (). getClassLoader (). GetResource ("Test.xml"). GetPath ());// Directly get an input stream: InputStream in = GetClass (). getClassLoader (). getResourceAsStream ("Test.xml");//fetch at current thread-this method is not stable// String path = Thread.CurrentThread (). Getcontextclassloader (). GetResou

PackageCom.swift;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException; Public classio_sort_content { Public Static voidMain (string[] args) {/** The contents of the known file A.txt file are "Bcdeadferwplkou", * please write the program to read the contents of the

1. Read the last row of the file. Of course, this method is faster than the following one. Randomaccessfile Rf = NULL; 2. Read the last record of the file String string2 = NULL; 3. append records at the end of the file Try { 4. append records at the end of the

Copy CodeThe code is as follows: $fh = fopen ($path, "r+"); if (Flock ($FH, LOCK_EX)) {//Add write Lock $old _content=json_decode (Fread ($fh, FileSize ($path)), true); $old _content= $old _content. $new _content; Ftruncate ($fh, 0); Truncates a file to a given length Rewind ($FH); Rewind the position of the file pointer Fwrite ($FH, Json_encode ($old _content)

(len = fis.read (buffer)) >0){Fos.write (Buffer,0,len);}}Did you find any specific reasons for this?Cause: If you upload a file using the above code, open the uploaded file to indicate that the file is being consumed by another application. But after a while, you can open it.Remember to close the input and output stre

Tag:resoid Path nullnew ase+=create document NBSP;NBSP;NBSP; Create file public static void CreateFile (file filename) {try {if (!filename.exists ()) {Filename.createnewfile ()}} catch (Exception e) {//Todo:handle exceptione.printstacktrace ();}} Write TXT content is not overwritten append write public static Boolean filechasewrite (String content,string filepath) {Boolean flag=false;try { FileWriter fw=new

2017-10-30The interview in the previous days when the exam two questions, are related to the Java Foundation: Use Java IO package to read and write files; Use JDBC to get the data. It is a pity that I could not remember the basic knowledge, so it is necessary to tidy up and consolidate this knowledge.In this summary, I will summarize the

Date_default_timezone_set (' Asia/hong_kong '); Set time zone Set_error_handler ("MyHandler"); Set Error Handler $chinatime = Date (' y-m-d h:i:s '); Get current time $max _size = 500000; Try { $content = "Hello weixin!"; Logger2 ($content); throw new Exception ("Value must be 1 or below aaaaaaaaaaaaaaaaaaa"); } catch (Exception $e) { Logger2 ("Exception Message:". $e->getmessage ()); } Record operation

Java Log component Logback use: Load a configuration file under a non-classpath and set a scheduled updateExcerpt: 78874499December 22, 2017 16:20:29Hits: 868 Tags: javalogback log configuration file Logback-xm more Personal Category:Java

Copy Code code as follows: Date_default_timezone_set (' Asia/hong_kong '); Set time zone Set_error_handler ("MyHandler"); Set Error Handler $chinatime = Date (' y-m-d h:i:s '); Get current time $max _size = 500000; Try { $content = "Hello weixin!"; Logger2 ($content); throw new Exception ("Value must be 1 or below aaaaaaaaaaaaaaaaaaa"); } catch (Exception $e) { Logger2 ("Exception message:"

Project Environment1. Project type: Java Web2.web Container: Tomcat3. Frame: Spring4. Calling code: Spring-Configured Scheduled Tasks, task execution classes are injected with @component (starting to think there's a problem here ￣-￣| |)Main phenomena1. When Tomcat is started, it is found that the log cannot be written2. Delete

third step: the corresponding modification of the attributes, before the change must know what these are doing, in the second part of the explanation. Step Fourth: Add the relevant statement to the class where you want to output the log: Define attributes: Protected final log = Logfactory.getlog (GetClass ()); In the appropriate method: if (log.isdebugenabled ()) { Log.debug ("System ..."); } Ii. Descript

Development log of the imitation codoy music player adds the file drag function (with source code) for the form with ole, codoy ole Reprinted, please describe the original source. Thank you ~~ The Mid-Autumn Festival is approaching. I went out for a few days. Today, we have completed the development of the cool dog-like program. The next blog will talk about the

Original: http://www.open-open.com/code/view/1423281836529Java in a variety of ways to read the file one or more ways to read the contents of the file. 1, read file contents by byte2,

Set the time zone in PHP to record the implementation code of the log file. The copy code is as follows: htmlbody? Phpdate_default_timezone_set (AsiaHong_Kong); settimezoneset_error_handler (myHandler); seterrorhandler $ chinatimedate (Y-m-d The code is as follows: Date_

Doing Java for so long, has been doing web-related projects, some basic classes have almost forgotten. Often want to pick up, but always for some reasons, can not be fulfilled.In fact, there is no time, but sometimes tired of summing up, this hollow, determined to throw away all to pick up.File reading and writing is a frequently encountered work in a project, sometimes because of maintenance, and sometimes new features development. Our task is always

C + + read and write file operation code Constant Value DescriptionFmopenread 0 opens with read-only propertyFmopenwrite 1 opens with write-only propertyFmopenreadwrite 2 opens with read/write propertiesFmsharecompat 0 Compatible FCB mode (the assembly has the corresponding

The implementation code for setting the time zone to record log files in php. For more information, see The implementation code for setting the time zone to record log files in php. For more information, see The Code is as follows: Date_default_timezone_set ('Asia/Ho

1. Get the RecorderUsing log4j, the first step is to get the logger, which will be responsible for controlling the log information. Its syntax is:public static Logger GetLogger (String name),The logger is obtained by the specified name and, if necessary, a new logger is created for the name. Name generally takes the names of this class, such as:static Logger Logger = Logger.getlogger (ServerWithLog4j.class.getName ());2.