read and write file is a very common operation regarding file mainuplation. However, the powerfull getline only can read line by line(with new line character '\n' as delimiter). Inorder to write the line back into file, we often have to add '\n' at t…

Reading Lines from File in C++ In C++, istringstream has been used to read lines from a file. code: #include <iostream> #include <fstream> #include <string> #include <sstream> using namespace std; int main() { ifstream fin("vo…

原文地址:http://www.baeldung.com/java-read-lines-large-file 1. Overview This tutorial will show how to read all the lines from a large file in Java in an efficient manner. This article is part of the “Java – Back to Basic” tutorial here on Baeldung. 2. R…

referee:Java Programming Tutorial Advanced Input & Output (I/O) JDK 1.4+ introduced the so-called New I/O int java.nio package and its auxiliary packages to support high performance and intensive I/O operations. NIO is meant to complement the existin…

来源于:https://www.mkyong.com/java/apache-poi-reading-and-writing-excel-file-in-java/ In this article, we will discuss about how to read and write an excel file using Apache POI 1. Basic definitions for Apache POI library This section briefly describe a…

String examplejsPrefix = "example"; String examplejsSuffix = "js"; String examplejs = examplejsPrefix + "." + examplejsSuffix; try { // save it as a temporary file so the JVM will handle creating it and deleting File file = F…

File is a named location on disk to store related information. It is used to permanently store data in a non-volatile memory (e.g. hard disk). Since, random access memory (RAM) is volatile which loses its data when computer is turned off, we use file…

File I/O Introduction     We'll start our discussion of the UNIX System by describing the functions availablefor file I/O-open a file, read a file, write a file, and so on. Most file I/O on a UNIX system can be performed using only five functions: open, re…

一.awk -f program.file 功能使用 一直没有使用过awk的-f功能,感觉鸡肋,不是很实用,更多的是因为没有需求的原因 下面介绍下awk -f的使用方法 awk可以指定默认的文件路径,使用AWKPATH这个变量,然后source即可 [root@nlocalhost ~]# tail -2 /etc/profile export AWKPATH=/usr/local/lib:/tmp [root@nlocalhost ~]# echo $AWKPATH /usr/local/li…

问题来源:在删除var目录下的log文件时,将redis文件夹删除了.然后在重启时:/etc/init.d/redis-server start,提示: Starting redis-server: *** FATAL CONFIG FILE ERROR *** Reading the configuration file, at line 94 >>> 'logfile /var/log/redis/redis-server.log' Can't open the log file:…