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The Bean class in Spring configuration uses the meaning of the factory bean to parseThe beautiful Life of the Sun Vulcan (http://blog.csdn.net/opengl_es)This article follows "Attribution-non-commercial use-consistent" authoring public agreementReprint Please keep this sentence: Sun Vulcan's Beautiful Life-this blog focuses on Agile development and mobile and IoT device research: IOS, Android, HTML5, Arduino

Spring bean dependency injection, bean assembly and related annotations, springbeanDependency Injection Spring provides the following two methods for dependency injection: Property-based Setter method Injection Constructor Injection Setter method Injection Example: public class Communication { private Messaging messaging; /* * DI via Setter */ public void setMessaging(Messaging m

Bean of Spring Core Components and spring core beanBeanBean class hierarchy of Spring Core Components BeanFactory is the top-level interface of Bean, where the source code is /spring-framework/spring-beans/src/main/java/org/springframework/beans/factory/BeanFactory.java DefaultListableBeanFactory implements all interfaces. But why do we need to define so many interfaces? To differentiate the restrictions o

Diagram of the spring container, bean configuration information, bean implementation class, and application four:Bean configuration information defines the implementation and dependencies of the bean, and the spring container establishes the Bean definition registry within the container based on various forms of

Reference: http://hi.baidu.com/victorlin23/blog/item/45ba7d1b2ccbced8ad6e7595.html The bean defaults to Singleton. If you do not want a singleton, the following configuration: Singleton is the configuration of this bean is a singleton, if not write, is the default value of True. Annotations: Spring Bean life cycle The scope of the 1.

Spring bean loading and Spring bean LoadingSpring instantiates the Beanbean loading process through reflection: Convert the corresponding beanName: remove the modifier of FactoryBean (remove "") Try to load the singleton from the cache (in map) Bean instantiation (the bean obtained previously is the original

Original link: http://blog.sina.com.cn/s/blog_5f1fe33f0100jibg.htmlExample code:Jsonbean bean = new Jsonbean ();Bean.setname ("Newbaby");Bean.setage (1);Bean.setborn (New Date ());Jo = Jsonobject.fromobject (bean);System.out.println ("Bean->json:" +jo.tostring ());Printed result: bean->json:{"age": 1, "born": {"date":

1. Instantiating the [default class constructor] using the Class Builder2. Instantiating using a static factory methodclass= "Cn.itcast.service.OrderFactory" factory-method= "Createorder"/>publicclass orderfactory { // Note This method here is static! public static Orderservicebean Createorder () { return New Orderservicebean (); }}3. Instantiate using the instance factory method:class= "Cn.itcast.service.OrderFactory"/>Publicclass orderfactory { Public Orderserviceb

Stateful session Bean: each user has its own unique instance, during the lifetime of the user, the bean maintains the user's information, namely "stateful"; Once the user dies (the end of the call or the end of the instance), the bean's lifetime ends. That is, each user will initially get an initial bean.Stateless session Bean:bean Once instantiated, they are added to the session pool and can be shared by i

There are two types of beans in Spring, one is a normal bean and the other is a factory bean, or Factorybean.A factory bean differs from a normal bean in that it returns an object that is not an instance of the specified class, and returns the object returned by the factory Bean's GetObject method.　　1.1 Creating a

Spring learning notes (3) -- Bean injection method, learning notes bean Dependency Injection Dependency injection supports property injection, constructor injection, and factory injection. Property injection: Property injection uses the setXxx () method to inject Bean property values or dependent objects. Property injection requires

@Required comment The setter method applied to the Bean property, which indicates that the affected bean properties must be placed in the XML configuration file at configuration time, or the container throws a Beaninitializationexception exception.Java Public classStudent {PrivateInteger age; PrivateString name; @Required Public voidsetage (Integer age) { This. Age =Age ; } PublicInteger getage () {retur

Stateful Session Bean: each user has its own unique instance,Bean maintains user information, that is, "stateful"The bean life cycle ends once the user dies (the call ends or the instance ends.That is, each user will initially get an initial Bean.Stateless Session Bean: Once instantiated, the

Spring (4) Bean injection (Spring Bean injection)1. constructor Injection Definition: You can use constructors to set dependencies. Advantages and disadvantages: Complete dependency creation while constructing objects If there are many associated objects, you have to add too many parameters to the constructor. Base index: if the specified index starts from 0, type is used to specify the type. Entity class:

The design principle of spring is to use as many instances as possible and as many single-State instances as possible, which can be seen from its bean configuration file. However, sometimes injection is not the best solution, especially for the processing of legacy classes. Static classes may be a better solution, because static classes do not need to be injected, there is no need to change the original code too much. One problem with spring injection

Problem:When injecting a multi-instance bean into a singleton bean, it is not getting to that multi-sample object, because, when the singleton is initialized, it is initialized directly, and this multi-instance bean is always getting the first initialized bean.Configuration file: Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xmlns:aop= "HTTP:

The following content is translated from: https://www.tutorialspoint.com/springmvc/springmvc_beannameurlhandlermapping.htmDescription: The sample is based on spring MVC 4.1.6.The following example shows how to use the bean Name Url Handler Mapping using the Spring WEB MVC framework. The Beannameurlhandlermapping class is the default handler mapping class that maps URL requests to the names of the beans that are mentioned in the configuration.Beans>

Method injection is rarely used in spring, where the main application is that a protected abstract method may be defined in the object, and the container may implement it at runtime to return the object that is queried by the container. One of the best uses of method injection is to handle situations where a single state, stateless object needs to invoke a non-state, stateful, or non-thread-safe object. When you first contacted spring, if you called a singleton

Below we step by step analysis Docreatbean method, first starts from Createbeaninstance. Protected Beanwrapper createbeaninstance (String beanname, Rootbeandefinition mbd, object[] args) {//Make sure bean CLA SS is actually resolved at the this point. Parse Class class 1,autowireconstructor There are two scenarios for the creation of instances in spring, one for general instantiation and the other for instantiation with parameters. The ins

SpringMVC conflicts with existing, non-compatible bean definition of same name and class solution, springmvc obtains beanCause Recently, a colleague from the project team encountered a problem. The module he was responsible for, SpringMVC Controller, and the Controller class names of other modules were duplicated, causing the whole project to fail. The following error is reported in the background: ××Controller' for