class getname

Struct2: Configure json and struct2json Before using struct2 to return json, you need to add two jar packages: struts2-json-plugin-2.3.x.jar and json-lib-2.3-jdk15.jar. Otherwise, an error will occur. This does not explain how the Action class is

Method areaInside a JVM instance, type information is stored in a memory logical area called the method area. Type information is extracted from the class file by the ClassLoader when the class is loaded. Class (Static) variables are also stored in

Implementation of inheritanceBasic concepts of inheritancebefore using inheritance, as shown belowClass person{//defines the person class private String name;//defines the Name property private int age;//defines the Age property public void SetName (

Here are three ways to print logs: Console console, file files, database1. Download the lo4j jar package and import the project2. Because you want to add a log to the database, create a new library and create a new table for the print log.Create a

BriefJava uses the thread class to represent threads, and all threads must be instances of thread or its subclasses.The task of each thread is to complete a certain task, in effect, to execute a program FLOW."to Create and start multi-threaded steps

What is Singleton pattern?In Wikipedia, there was an explanation: "In software engineering, the singleton pattern was a design pattern that re Stricts the instantiation of a class to one object. "First, what is a singleton mode?In Wikipedia, this

Today, a reflection of the day, in fact, the reflection itself is very simple, but the use of relatively complex;Let's talk about what reflection is. The power of reflection is that he can invoke any property in the native Java file, either private

First download the package required by log4. Write countProgramRun it. The principle is not to mention, there are a lot of online. Package untitled9; Import org. Apache. log4j .*; Public class testlog4j {Static logger log = logger. getlogger

Import COM. xxx. config. configmanager; import COM. xxx. config. configs;/*** connection management class * @ author */public class connectionmanager {// Database Type Private Static int dbtype =-1; Private Static connectionfactory _ connfactory; /**

The Optionmenu in the SWE browser is displayed by the controller through onkeydown monitoring keycode_menu. public boolean OnKeyDown (int KeyCode, KeyEvent event) { if (keycode = = KeyEvent. keycode_menu && Event.getrepeatcount () = = 0 //

DispatcherServlet introductionDispatcherServlet is the implementation of the Spring front-end controller. It provides Spring Web MVC centralized access points and is responsible for assigning responsibilities. It is seamlessly integrated with Spring

In the previous example, each entity Bean is mapped to only one table in the database. In fact, one entity Bean can be mapped to multiple tables. It is often used in some projects that require dictionary tables. For example, I have used many data

This plug-in is used in struts applications.ProgramStart hibernate initialization, the original document hibernateplugin for struts, the steps are very simple: 1. Add in struts-config.xml: Plug-in Classname = "Org. haree. Struts.

Problem description Today, I encountered a strange problem during development. There is an action in which request is used. the setattribute () method places a list object in the request and forward it to a JSP file. The main content of this file

If the problem is solved by a colleague, you can extract it for backup. Problem description: the following error occurs when an ESB service is called in oaf:Error Page exception details. oracle. apps. FND. framework. OA exception: Oracle. jbo.

Basic information:-------------Log4j-1.2.9.jar Configuration process:------------1) Load log4j-1.2.9.jar2) Configure log4j. properties in the root path. refer to the following log4j configuration code.3) Add the following logging code to the Java

Ehcache source code analysis: First, check the cache class cachemanager. Public class cachemanager {// This class reads ehcache under classpath by default. XML file, and a new cache class is created in singleton mode/*** keeps track of all known

After several years of development, log4j finally ushered in its sister version, log4j 2.0. With the emphasis on reusable component development, in addition to developing a reusable log operation class from start to end, Apache provides us with a

Android training Java training is coming to be discussed with you!   Java Singleton mode is a common design mode. Singleton mode is divided into three types: lazy Singleton, ELE. Me Singleton, and registered Singleton.The Singleton mode has the

When log4j is called to output logs in XXX class, the following statement is called at first, Public static logger = org. Apache. log4j. Logger. getlogger (class name. Class. getname ()); This method can be used to set the Log Level of the class in