Java

One, export Excel1, using Excel templates Public voidExportlog ()throwsexception{systemuser currentusr=Getcurrentsystemuser (); //All logs for this userList loglist=Logservice.getloginfosbyuserid (Currentusr.getid ()); List list=NewArraylist();

when Java calls a DLL, it appears No DLL in Java.library.path exception, not common in Java project, as long as the DLL is copied to the System32 directory; However, it is often encountered in Web project, because Web project references the

Foo fool=new foo ();Any class, also an instance object of the class class, is represented by the following method:(1) Any class has an implied static member variable classClass C1=foo.class;(2) The object of the class has been known to pass the

(Excerpt from: Java Classic Getting Started tutorial)Http://wenku.baidu.com/link?url= Iowi58cd5vzehn-nl4pn7gren-rfzydrhjdletabyc9l-9aninylwuwchpwiyc3hqhzpws5fv2fuh-k1zp4ixh6afvkpibvtdflpbvwp1tcV: basic knowledge of Java code1: statementWith a

These years have been mainly engaged in C, C + +, some of the bottom, have always wanted to know more about the upper level of things. So the use of spare time, read some Java aspects of things, but also use some architecture to build some simple

In the Java Web development process, processing form data is an important part of the common is the form post processing a single piece of data, but also encountered one time to submit multiple data to the server, as follows:JSP page is generally

When you receive the value from the foreground until the action is not garbled in the time, however, when writing to the database is really garbledHere are a few reasons:1. Your database character encoding specifies a problemWhen you specify the

enjoy meta-mode overview use shared technology to effectively support a large number of fine-grained objects. Applicability use flyweight mode when all of the following conditions are in place:1. An application uses a large number of objects.

1.JVM (Java Virtual machine) 1.-xms Initial Heap Size2.-xmx Maximum Heap Size3.-XMN Youth Generation Size4.-XSS the stack size per thread5.-XX:+USEPARNEWGC Youth GenerationThe garbage collection method isParallel collection

Mina is the concrete realization of NIO. is currently a relatively efficient and popular NIO framework.Here is a simple demo of communicating using Mina, followed by a simple framework for writing an RPC with Mina. Mina mainly include: (using the

This is a small program written in the Sophomore Java Foundation, by setting the host IP and port in the program to achieve communication between the two hosts. Since the specification of Java programming was not very good at the time,So the program

Spring MVC binding parametersI. Simple binding of JavaBean Suppose we have a simple Person class. public class Person {private String name;private Integer age;public String getName() {return name;}public void setName(String name) {this.name = name;}

What is nginx? Nginx and vsftpd are mainly used.For installation, you can download it directly from the nginx official website, or... yum install nginx 　If there is no yum source, you need to add it and then install it. yum install wgetwget http://

Object-oriented basics: object usage and object-oriented basic objects Object usage Call variables and functions using objects: Object.Variable object.Function () For example, create a Dog class and use an object // Class file Dogclass Dog {String

Thread uses the Runnable interface to simulate four window ticket sales, threadrunnable // Copyrightliupengcheng // Http://www.cnblogs.com/liupengcheng /*** Created by Administrator on 2014/10/23.* The following example shows how to sell 100

Trivial-about hadoop2.2.0, trivial-hadoop2.2.0 HDFS module functions Namenode: the master node that stores file metadata such as file names, file directory structures, and file attributes (generation time, number of copies, and file permissions)

Hibernate 2. CRUD Key Generator (primary Key Generator) Option description: 1) assigned The primary key is generated by an external program and does not involve Hibernate. 2) hilo The

Synchronization lock of traditional multithreading (2) I. Thread Security Thread security issues refer to the fact that common things in a program are accessed by multiple threads, such as static variables of classes. Ii. Synchronization lock Is

Explanation of string exercises and interview questions (Article 1) Question 1: WERTYU (Competition basics) When you place your hand on the keyboard, you will be right and wrong when you do not pay attention to it. In this case, Q will change to W,

JAVA learning lesson 36th (Common Object API)-Set framework (IV)-Set: HashSet Set demonstration With the development of Java, I feel like I have been using ACM for a year. It is wise to understand a lot of data structures and algorithms in Java. The