spring service annotation

On a whim, looking at spring's source code for two days, I want to write a simple spring using annotation injection!! Spring's annotation injection method gives us a very convenient benefit! Everyone should understand the injection principle of spring, write a very simple example of using annotations to inject, make a

Spring 2.5 introduces MVC controllers based on Annotation configuration. This short article describes how to migrate your spring 2.0 application to spring 2.5, at least MVC-related applications. First make sure that you have placed the spring-webmvc.jar in your classpath, d

@Component, @Service, @Controller, @Repository annotated classes, and incorporate these classes into the spring container for management. The following is a scan component that introduces componentwhere Base-package is the package that needs to be scanned (with all child packages)1, @Service for labeling business layer components2. @Controller for labeling Contro

The content of this article is a summary of the online, only to do the study. Spring Annotation-based configuration @Required Annotation The setter method applied to bean properties. Indicates that the affected bean must be placed in the XML configuration file when it is configured, or the container throws a Beaninitialzationexception exception. @Autowired Anno

Sonicbeanpostprocessor implements Beanpostprocessor, Applicationcontextaware {private Applica Tioncontext ApplicationContext; @Override public Object Postprocessbeforeinitialization (object bean, String beanname) throws Beansexception { LogCore.BASE.info ("beanname={}, bean={}", Beanname, Bean.getclass ()); Forced retrieval of properties with or without sreference if (Hasannotation (Bean.getclass (). Getannotations (), SReference.class.getName ())) {

, applicationcontext.xml Add configuration (similar to the thing configuration)turn on the annotation function of the cache, otherwise the annotations will not take effect - Cache:annotation-driven/> declaring the cache manager - BeanID= "CacheManager"class= "Org.springframework.cache.ehcache.EhCacheCacheManager"> Propertyname= "CacheManager"ref= "Ehcachefactory"> Property> Bean> Specify the factory class

To use annotation steps:1) First introduce the context namespacexmlns:context= "Http://www.springframework.org/schema/context"2) Turn on annotation scanning3) using annotationsThe object is added to the IOC container by means of annotations . Create objects and manipulate object dependencies, related annotations:@Component specifies that an object be added to the IOC container@Repository function with @comp

Description Annotations are a class in spring, using the @+ annotation nameIn development, annotations can be used instead of XML configurations. more efficient and quick.If you make the annotation effective, you configure the namespace's declaration and scan information in the XML. @Component replaces IOC configuration (bean) in XML Let's give an example to

Implement AOP programming using spring annotations and XMLTo implement the AOP programming annotation method, follow these steps: 1) Introduce jar files related to aop first (excellent aspectj aop components) Spring-aop-3.2.5.RELEASE.jar [spring3.2 source code] Aopalliance. jar [spring2.5 source code/lib/aopalliance] Aspectjweaver. jar [spring2.5 source code/lib/

A problem, in a SPRINGMVC project, set up the transaction, and then add the @transactional annotation on the service, as long as you add this annotation, the service cannot be created successfully by spring, error creating bean With name xxx or something. Engaged for a long

AnnotationIs a special metadata syntax in Java. Spring supports annotation for Object Instantiation and assembly. Use Annotation to add the context namespace (yellow part) to the Spring configuration xml ): Add the Postprocessor: "processor" after bean Initialization is complete" @ Autowired can be

Description and Differencespring4.1 provides annotations (annotation-based)-based configuration, which we can use to complete injection dependencies. In Java code, you can use @Resource or @autowired annotations to line-inject. Although both @resource and @autowired can be used to complete the injection dependency, there is a difference between them. First Look at:A. @Resource By default is assembled by name, only if the bean that matches the name is

Summary:When using MyBatis, a series of DAO interfaces can be configured through Mybatis-spring Mapperfactorybean, and Mapperfactorybean GetObject method can return the dynamic proxy class corresponding to the DAO interface. The implementation class of the DAO interface is actually generated by defaultsqlsession in a dynamic proxy manner. And when there are many DAO classes, you can implement Mapperfactorybean objects and reduce configuration by confi

database table is automatically growing, add a piece of data now and want to get the ID of this data autogrow, as followsDAO layerUsegeneratedkeys=true: Gets the primary key generated by the databasekeyproperty= "id": The id attribute of the user Param object to which the primary key value is stored@Insert ("Insert into user (name) values (#{name})") @Options (Usegeneratedkeys= true, keyproperty="ID") publicint Add ( User param);Service LayerNew Use

When the jar exported from a project using annotation is running, the @ service modified class cannot be found. However, there is no problem with the execution in the project. The following error is reported:Caused by: org. springframework. Beans. Factory. nosuchbeandefinitionexception: No bean named 'wikicategorymigrateservicice 'is defined Solution:1. Define bean in XML. In this way,

The spring2.5 version provides annotated dependency injection functionality that can be reduced to XML configuration.The main use isAnnotationconfigapplicationcontext: An annotation configuration contextAutowiredannotationbeanpostprocessor:spring provides a beanpostprocessor implementation for this purpose to check whether the current object has @autowired-labeled dependency injection.In addition to using @autowired in the project, you can choose some

Spring's dependency check function can only check all attributes of Certain types. It cannot only check specific attributes and is not flexible enough. Generally, we only need to check whether specific attributes are set, rather than all attributes of a specific type. Requiredannotationbeanpostprocessor is a post-processor of spring bean. It checks whether all bean attributes with the @ required annotation