how to read log file in java code

Cessfile (FileName, "RW"); File length, number of bytes long filelength = Randomfile.length (); Moves the write file pointer to the end of the file. Randomfile.seek (filelength); Randomfile.writebytes (content); Randomfile.close (); } catch (IOException e) {e.printstacktrace (); }}/** *

Read the following two forms of Excel: *.xls and *.xlsxUsing the Apache POI API, you need to use the HSSF and XSSF class librariesHSSF is the POI Project's pure Java implementation of the "Excel" ( -2007) (. xls) file format.XSSF is the POI Project's pure Java implementation of the Excel OOXML (. xlsx)

sun JAXM is also used dom4j. Many of the current open source projects use dom4j, for example, the famous hibernate also uses dom4j to read XML configuration files. Consider the possibleThe portability of dom4j is not good.4.JDOM mode: The jdom itself does not contain parsers. It usually uses the SAX2 parser to parse and certify the input XML documentThe following is a DOM implementation of the XML file

file (memory)--Input stream--> "program"--Output stream-->file (memory) When we read and write text files, it is very convenient to use reader, such as Filereader,inputstreamreader and BufferedReader. One of the most important classes is InputStreamReader, which is a bridge between bytes converted to characters. You can specify the encoding in the constructor,

any issue. In addition, this client software supports MSSQL, MYSQL, Oracle ...... And other database connections, and many other functions will be studied by myself. Although Navicat can be used to open the 274MB SQL file of CSDN, the content is meaningless, and it is not convenient to query, classify, and count the account information. The only method is to read the data one by one, split different fragm

PHP code is lost when php writes file logs in high concurrency: Self: $ MAX_LOOP_COUNT) {$ result = 0;} else {$ loop ++; $ fp = self: $ fileHandlerCache ["$ filePath"]; if (empty ($ fp) {$ fp = fopen ($ filePath, "a +"); self: $ fileHandlerCache [$ filePath] = $ fp ;} if (flock ($ fp, LOCK_EX) {$ result = fwrite ($ fp, $ msg); flock ($ fp, LOCK_UN);} else {$ result = self :: internalOut ($ filePath, $ ms

the two people. Then you can start the phone call. Read party A's message through this line: New FileInputStream (file) This information is now read in memory. Then we need to interpret what party B can understand. Since you have used FileInputStream (). Then the corresponding need to use the InputStreamReader () method to interpret the data just loaded in mem

This article describes the Java file read and write and compression implementation method, the specific code is as follows: Package Com.toone.iform.action.common; Import Java.io.BufferedReader; Import Java.io.BufferedWriter; Import Java.io.File; Import Java.io.FileInputStream; Import java.io.FileNotFoundExc

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 Write

. To search for GetProperty (String key).3. SetProperty (String key,string value), invoke the Hashtable method put. He sets the value key-value pair by calling the base class's put method.4. Store (OutputStream out,string comments) to write the list of properties in this properties table (key and element pairs) to the output stream in a format suitable for loading into the properties table using the Load method. In contrast to the load method, this method writes a key-value pair to the specified

used to open the 274MB SQL file of CSDN, the content is meaningless, and it is not convenient to query, classify, and count the account information. The only method is to read the data one by one, split different fragments of each record, and store these fragments in the database as data fields, this makes it easier for you to use it later.Use PHP to read large

results are as follows: Outputstreamp???????????? *///create read characters, save corresponding acsii code int b =-1; Loops read the character, if the character is-1, the read to the end of the file while ((b = inputstream.read ())!=-1) {//Conve

be consistent:Example: After converting Chinese to ISO 8859_1 encoding, convert the 8859_1 code to Chinese:Native2ascii-encoding 8859_1 C:\a.txt C:\b.txt,Transcode A with 8859_1 and save as B (8859_1 code)Native2ascii-encoding GBK C:\b.txt C:\c.txt,Transcode B with GBK and Save as C (GBK code)Native2ascii-reverse C:\c.txt C:\d.txt,GBK encoding c with local

At first, Java does not support text file processing. In order to make up for this defect, two classes, reader and writer, are introduced. These two classes are abstract classes. In writer, write (char [] CH, int off, int length), flush () and close () are abstract methods, read (char [] CH, int off, int length) and close () in Reader () methods are abstract meth

Attributes Property Sets or returns the attributes of files or folders. Read/write or Read-only, depending on the attribute. Object. Attributes [= Newattributes] Arguments Object Required. Always the name of a File or Folder object. Newattributes Optional. If provided, Newattributes is the new value for the attributes of the specified object. Settings The N

To read and write files in PHP, you can use the following built-in functions:1. fopen (create a file and open a file)Syntax:Copy codeThe Code is as follows: fopen (filename, mode)Filename, specifies the file to be opened. Mode. The possible values are shown in the following

In Java development, we usually store configuration parameter information to a property file, which can be a property file with key value pairs, or an XML file, and refer to the blog "Java Programming" DOM XML Parser parsing, traversing, and creating XML. In this blog post,

The home page provides an example with Chinese instructions. Many of the following examples can be tested. CopyCode The Code is as follows: Copy code The Code is as follows: if you open an Excel file on a webpage, there is Excel. EXE in the process when you close the file

The metaserver metadata persistence of the KFS file system adopts the checkpoint + Log method,The following uses the source code to analyze the persistence mechanism and implementation details of metadata in KFS metaserver. 1. Related source code files KFS metaserver metadata persistenceCodeThe directory is KFS-[ve

Home to a Chinese description of the example, the following example a lot of people can test more. Copy Code code as follows: Copy Code code as follows: If you open an Excel file on a Web page, then there is a EXCEL.EXE in the process, so you mus