Java

Invocation part:Package Com.otdrmsys.action;import Com.otdrmsys.util.resultsettoexcel;public class Excelexport {public static void Main (string[] args) {//string filename = "OTDR";//filename, without path, without. xls suffix//string [] coloumitems =

Recently learned Java Connection Database (SQL Server), found that we have two common methods, then here I summarize how to use the two methods, there are their differences, and we generally use which method.Method One: Use Jdbc-odbc bridge to

Configuring Java JDK in Ubuntu should be a required skill for every Java developer. Previously, it was always a rough configuration without summary or review. Let's summarize it today! Some of the content in this article comes from the network, and

You need to restart the server to modify information in the web environment. If you often restart the server in a large project, you can imagine the waste of time. Today we will introduce spring boot! Generally, learning begins with hello world! The

The size of ipa generated by archive is smaller than that generated by bulid and then dragged to itunes. The size of ipa is 7 and 8 Mb. Cause The archive execution file does not contain debugging information, Xcode first generates the dSym file

In the previous article, we briefly introduced ZooKeeper deployment and node management. This section describes how to manage nodes through the java client. I don't want to introduce them one by one. I believe you can understand them from the

Original: STL non-variable algorithm-STL Algorithm MilkCu (http://blog.csdn.net/milkcu) Address: http://blog.csdn.net/milkcu/article/details/21114613 Abstract: The C ++ STL standard template library plays an important role in the field of data

Recently, I am working on a framework for reading database metadata. The database check exceptions are impressive. Try-catch is crazy. At the same time, when exceptions in the framework should be thrown to the caller and which ones should be handled

I recently read the design model. I like this book very much, and the content is also very understandable. I am a little addicted to reading it. Haha, I first looked at the object-oriented basics. I have been familiar with object-oriented basics

SummaryThe Factory mode should also be one of the most widely used modes in modern programming languages. The Factory mode has many variants, which are implemented in various forms according to the actual situation. The most common possibility is

Import java. util. arrayList; import java. util. linkedHashMap; import java. util. list; import java. util. map; import java. util. regex. matcher; import java. util. regex. pattern;/*** creation date: June 9, 2014 17:23:29 * Author: Huang Fei *

Multithreading is an important aspect of Java learning and a basic skill that every Java programmer must possess. This article is just a Summary of the details and nature of multithreading, and does not have an example of getting started with code.

Build errors for spider; org. apache. maven. lifecycle. lifecycleExecutionException: Failed to execute goal org. apache. maven. plugins: maven-compiler-plugin: 2.3.2: compile (default-compile) on project spider: Compilation failureUnable to locate

There are three methods to obtain the DataSource object in the Spring framework:1. Obtain DataSource from JNDI.2. Obtain DataSource from a third-party connection pool.3. Use DriverManagerDataSource to obtain the DataSource. 1. Obtain DataSource from

There are many Chinese character-to-PinYin conversion solutions on the Internet, but they do not know the performance and reliability. Therefore, based on the authoritative choice principle, I still want to find an official solution. The following

Preface To learn any technology that is a little difficult, you must make a rational analysis of it, and then make a decisive decision-> that is, what people often say is "Seeking for profit "; although this series involves socket-related

What is the difference between a character and a byte ...... I don't know.1. Basic operation instance import java.io.*;public class CharDemo{public static void main(String[] args){File f=new File("F:\\workspace\\Javaprj\\test.txt");Writer

We can make java input and output as in C language, printf (); amazing ~~ First, create Print. java and put it into the gao.com package. package com.gao;import java.io.*;public class Print { // Print with a newline: public static void

In javafx, a JVM process can only have one Application class. This Application class can only call the launch () method once to start it. What if we start a new window? In javafx, the Stage class inherits a Window, so we only need to construct a

I. ProxyCall a class (delegate class, the class that actually completes the work) method to another class (proxy class, which can be statically or dynamically generated. If the delegate class and proxy class implement the same interface, the proxy