read file into arraylist java

From: http://blog.csdn.net/hbcui1984/archive/2007/02/28/1516911.aspxIn actual work, we often need to save some system configuration information. Generally, you can select a configuration file to complete the process, based on the methods used in my work to read the configuration file, this article briefly describes how spring reads the configuration

Java IO stream: Random file read/write, javaio stream The Java. io package provides the RandomAccessFile class for creating and accessing random files. Using this class, you can jump to any position of the file to read and write d

: E:\eclipseM9\workspace\tree\Tree is the root directory of my Web project2. You can also call in any class at any time.This.getclass (). getClassLoader (). GetResource (""). GetPath ();This will get the full path to the classes directoryExample:/d:/workspace/strutstest/webroot/web-inf/classes/There are also This.getclass (). GetResource (""). GetPath (). toString ();This will get to/d:/workspace/strutstest/webroot/web-inf/classes/bl/This method can also not be used in the Web environment to det

/spring 3 ID---0001 4 username---rootFour, can be applied scenario: write a common method, without modifying the program, you can get any database connectionSolution: The full class name, URL, user, and password of the database-driven driver implementation class are put into a configuration file, which is implemented by modifying the configuration file and decoupling the specific database.1 Public StaticCo

Read files: FileinputstreamCreate a fileinputstream by opening a connection to the actual file. Name. Create a new filedescriptor object to indicate the file connection.InputstreamreaderInputstreamreader is a bridge between byte streams: it uses the specified charset to read bytes and decode them into words. .

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

capacity of the ArrayList instance, which reduces the amount of incremental redistribution. Note that the ArrayList implementation is not synchronous . If more than one thread accesses a ArrayList instance at the same time, and at least one of the threads modifies the list from the structure, it must remain externally synchronized. So in order to ensure synchron

First, we look at Python is very simple:1. Read the file:1 with open ("/path/file","R") as fr:2 for in fr.readlines ():3 do_somethings (line)2. Write files:1 with open ("/path/file","w/a") as fr: 2 fr.write ("ssssssss")Second, the above knowledge a primer, not the focus, or to learn the

I. Background Recently, in the process of project development, I encountered the need to define some custom variables in the properties file for the dynamic reading of Java programs, modify variables, no longer need to modify the code problem. To take this opportunity to spring+springmvc+mybatis integrated development of the project through the Java program to

If a Java Web project is running on a tomcat or other container, you can use the following method to get the input stream of the file1. When the attribute file is placed under SRCInputStream is = Thread.CurrentThread (). Getcontextclassloader (). getResourceAsStream ("test.properties"); Properties p = new properties ();p. Load (IS);2. When a property file is plac

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.FileNotFoundException; Import Java.io.FileOutputStream; Im

) {e.printstacktrace ();} TRYNBSP;{SYSTEM.OUT.PRINTLN ("read file contents in characters, read multiple bytes at a time:");// read multiple characters at once Char[]tempchars=new char[30];intcharread=0;reader=newinputstreamreader (new FileInputStream (fileName);// reads multiple characters into a character array, charr

Construct File class File F=new file (fileName); To determine whether a directory F.isdirectory (); Get the file name under the directory String[] Filename=f.list (); Get the files in the directoryFile[] Files=f.listfiles (); 1, Java How to

Java file readJust beginning with Java, as the previous C language of heavy users, found that the previously familiar file read File.read () in the Java.io.File class can not find. Instead of Java.io.InputStream, InputStream is an abstract class of I/O operations, where File

As a junior developer, every day on the network to find someone else's code, and then modify the change to apply to the project, unknowingly, I really become the code of the porter.The fun of programming is to find the code that you want in the vast ocean of knowledge, to share information, to facilitate yourself, and to facilitate others.The following code is a simple Java code that reads an instance of a TXT fil