jar of beans

1. Before the web system starts running, you need to populate the database with some pre-built data. Here you need a method that runs only once while the system is running, to implement the initialization process of the system.Here, it's natural to think of Servletcontextlistener as such a listener, as described in the SERLVET-API documentation. Interface for receiving notification events about ServletContext lifecycle changes. and just, a web system, there is only one servletcontext. 2. Then th

(Com.mycompany.shequ.bean),650) this.width=650; "Src=" https://s4.51cto.com/wyfs02/M01/8F/12/wKioL1jTL0fSiiKLAABJlE6kvEs353.png-wh_500x0-wm_ 3-wmp_4-s_2704144457.png "title=" Qq20170323101240.png "alt=" Wkiol1jtl0fsiiklaabjle6kves353.png-wh_50 "/>10. The contents of the test class forumposttest are as followsPackage Com.mycompany.shequ.bean;import Org.junit.test;import Org.springframework.context.ApplicationContext;Import Org.springframework.context.support.classpathxmlapplicationcontext;public

The life cycle of the Bean in the IOC container:1. Creating a Bean instance from a constructor or factory method2. Setting values and references to other beans for the Bean's properties3. Call the Bean's post processor Interface (BEANPOSTPROCESSOR) for initialization pre-processing4. Invoking the Bean's initialization method5. Call the Bean Post processor Interface (BEANPOSTPROCESSOR) for initialization post processing6.Bean can use the7. When the con

There are three ways to configure beans:1. XML-based (for third-party class libraries, cannot write annotations in classes and write namespace configurations, etc.)2. Annotations based (for most cases)3. Java-based classesHere are three different scenarios for how to configure Based on XML Based on annotations Java-based class configuration The definition of a Bean @Component (or derivative @repos

When we actually develop it, we often encounter the necessary actions before or after the bean is used, and spring provides support for the bean's life cycle operations.There are two ways to use Java Configuration and annotation configurations.1.Java configuration: Use @bean's Initmethod and Destroymethod (equivalent to XML-configured Init-method and Destory-method).2. Annotation method: Use JSR-250 @postconstruct and @predestroy.Instance1. Increase JSR250 support.dependency> groupId>javax.ann

Today is the 30th anniversary of the "eat beans game" release. To commemorate this special day, Google provided an interactive logo on the home page for the first time. You can directly play eat beans game on the Google homepage, in addition, the game sounds and colors are the same as the original ones. In general, Google will replace the logo after today, so that it will no longer be able to play this g

Spring projects sometimes get an error:java.lang.IllegalStateException:BeanFactory not initialized or already closed-call ' refresh ' Before accessing beans via the ApplicationContextCause: The spring initializes the Bean object with an error, 1) The ID of the XML bean is duplicated;2) If it is an annotation configuration: the name of the annotation may be duplicated:You just have to change the ID of the duplicate bean and the duplicate note.Java.lang

) factory). Registershutdownhook (); }21}Closing the container uses a hook method that is actually abstractapplicationcontext.Let's take a look at the results:Now start initializing the container 2014-5-18 15:46:20 org.springframework.context.support.AbstractApplicationContext preparerefresh Information: refreshing org[emailprotected]19a0c7c:startup date [Sun May 15:46:20 CST 2014]; Root of context hierarchy2014-5-18 15:46:20 Org.springframework.beans.factory.xml.XmlBeanDefinitionReader Load

Intellij Idea development tool in @autowired or @resource injection Xxxmapper interface times the following error:Could not autowire. No beans of ' tbitemmapper ' type found. Less ... (CTRL+F1) Checks autowiring ProbThe solution is as follows, set in Intellij idea:Settings-editor-inspections-spring-spring core-code-autowiring for Bean class-disable (as if to remove √) and saveCould not autowire. No beans of

* @throwsnosuchbeandefinitionexception the */ the Public StaticClass GetType (String name)throwsnosuchbeandefinitionexception { + returnApplicationcontext.gettype (name); - } the Bayi /** the * If the given bean name has an alias in the bean definition, these aliases are returned the * @paramname - * @return - * @throwsnosuchbeandefinitionexception the */ the Public StaticString[] Getaliases (String name)throwsnosuchbeandefinitionexception

When using the spring framework, many times you do not know or ignore the problem of multithreading. Because writing a program, or doing unit testing, it is difficult to have the opportunity to encounter multi-threaded problems, because it is not so easy to simulate the environment of multithreaded testing. But if you don't think about the potential loophole, it will become the invisible killer of the program, and explode when you don't know it. And, usually when the program is delivered, it can

Preamble: Start learning Spring core ideas, combined with a cottage lite version of spriing code to learn.Content: 1. Abstract beanfactory--oriented interface is easier to expand beanfactory-interface is easier to expand. 2. Initialize the bean inside the abstractbeanfactory.The beandefinition here compares to a richer, more beandefinition-containing class of beans, where we do not instantiate the bean to beandefinition before registering. Instead, th

The controller scope for spring when consolidating SPRINGMVC is a singleton by default.The action is a scope prototype when spring consolidates Strut2.We know that spring defaults to singleton when configuring beans.then for the service and DAO layer beans is also the singleton model used. Let's do a test.Package Com.pyc.test.controller;import Org.springframework.context.annotation.scope;import Org.springframework.stereotype.controller;import Org.spri

Tool classImportorg.springframework.beans.BeansException;ImportOrg.springframework.context.ApplicationContext;ImportOrg.springframework.context.ApplicationContextAware;Importorg.springframework.stereotype.Component;/*** author:mr.x * DATE:2017/11/8 10:00am * Description:*/@Component Public classSpringcontextutilsImplementsApplicationcontextaware {/*** Context object instance*/ Private StaticApplicationContext ApplicationContext; @Override Public voidSetapplicationcontext (ApplicationContext A

For beans that conform to the Java Bean specification, calling its methods should take precedence over method calls with Java.beans.PropertyDescriptor to obtain greater maintainability.public void Gridcolumnfilter (listThrough Class.forName or information of the kindPublic ClasslistList = (listJsonarray.fromobject (Jsonobject),Class.forName (Classname.getname ()));return list;}This article is from the "Jia Xiaoxian" blog, make sure to keep this source

　Before Spring initializes the bean, there are three ways to do it after the bean is destroyed:1. The operation that was performed prior to initialization through @postconstruct, @PreDestroy implementation before destroying the bean2. By defining the Init-method and Destory-method methods in XML3. Implement Initializingbean and Disposablebean through beans@PostConstruct descriptionThe method that is modified by @postconstruct will run when the server

This article focuses on four ways to instantiate beans (injection mode) or four ways to instantiate a dependent object. The above program, which creates the Bean object, uses the method of the constructor (Spring can create the class object in the case of privatization of the constructor)There are four common ways to create these types of methods:1) Setter method2) constructor function3) Static Factory4) Instance FactoryFirst, using setter way Public

Types of beans1. Normal Bean: normal Bean before operation2.Factorybean: is a special bean that has the ability to produce objects in a factory, but can only produce specific objectsThe bean must implement the Factorybean interface, which provides a GetObject () to obtain a specific bean.Underlying code:FB fb=new FB ();return Fb.getobject ();Factorybean and beanfactory contrast,Beanfactory: is a factory that is used to produce any bean.Factorybean: is a bean used by

Assembling beans through Java codeFor example, you need to load the components of a third-party library into your app, and you can't add @component and @autowired annotations to his class at this time, and you can't use automated assembly.In this case, you must use the form of an explicit assembly, and you can choose either Java code assembly or XML assemblyRecommendation: Explicit configuration is preferred with Javaconfig assembly because he is powe

Cool Guest actually has limited one is the day can mention the amount, that is, you can only mention so much today is that you have more than tomorrow to say. Cool guest Live How to mention now cool beans 1, the mobile phone login "Cool guest Live" and then click "Personal Center" below "my earnings" as shown in the following figure. 2, then you can see the amount of cash, enter the amount of cash, choose to present account, click the Lift b