crucible annotations

Starting with JDK 5.0, Java added support for meta data (MetaData), which is Annotation (annotations)Annotation is actually a special tag in the code that can be read at compile, class load, run time, and perform the appropriate processing. By using Annotation, programmers can embed some supplemental information in the source file without changing the original logic.Annotation can be used like modifiers, which can be used to modify the declarations of

annotations Optional value: Retentionpolicy.source (source time), Retentionpolicy.class (compile time), Retentionpolicy.runtime (runtime) @ Target Used to specify which program elements the annotations can decorate Selectable values: Elementtype.type, Elementtype.method, Elementtype.constructor, Elementtype.field, Elementtype.parameter, etc. @ Inh

1 customizing annotations 1.1 creating custom annotationsCustom annotations can be defined using @interface starting from Java5Tip 01: Annotations Do not directly interfere with the operation of the program code (i.e., the code will function correctly after adding and deleting annotations)Tip:@Retention used to declare

http://www.jb51.net/article/55371.htmhttp://www.cnblogs.com/peida/archive/2013/04/24/3036689.html Retention annotations retention (reserved) Note that this type of annotation is retained at that stage. There are three values: 1.retentionpolicy.source--This type of annotations is only preserved at the source level and is ignored at compile time by 2. retentionpolicy.class--This type of

Original: http://www.cnblogs.com/peida/archive/2013/04/24/3036689.html.Meta-Annotations:The role of meta annotations is to be responsible for annotating other annotations. Java5.0 defines 4 standard meta-annotation types, which are used to provide descriptions of other annotation types. Java5.0 defined meta-annotations:[Email protected],[Email protected],[Email p

In Microsoft Office Excel 2007, you can add a comment to a cell by inserting an annotation. You can edit the text in the annotation, or you can delete the annotations that you no longer need. Add annotations 1, click the cell that you want to add the annotation to. 2, on the Review tab, in the Comments group, click New Annotation. 3, in the Annotation text box, type the annotation text. Note in

The main contents of this section:1: How to get Configuration items in a configuration file in a non-annotated way2: Use annotations to Get External properties file configuration itemsStatement:This article is an important note for the Spring boot framework to learn preschool Mastery (3)-Read the external resource profile by annotating the Edith accompany you learn series-Framework learning Spring boot Framework learning. You are welcome to commentOne

Reprint: http://www.cnblogs.com/younggun/archive/2013/07/16/3193800.htmlSteps to use:Step one, introducing the Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xmlns:tx= "Http://www.springframework.org/schema/tx"Xsi:schemalocation= "Http://www.springframework.org/schema/beansHttp://www.springframework.org/schema/beans/spring-beans-2.0.xsdHttp://www.springframework.org/schema/txHttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd ">Step two, beans with @transactional

Java Annotations and ReflectionsIn Java, four kinds of meta-annotations are provided, which are specifically responsible for annotating other annotations, as follows1, @Retention meta-annotations, indicating the level at which the annotation information (life cycle) needs to be saved. The optional retentionpoicy parame

steps to use: Step one, introducing the Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xmlns:tx= "Http://www.springframework.org/schema/tx"Xsi:schemalocation= "Http://www.springframework.org/schema/beansHttp://www.springframework.org/schema/beans/spring-beans-2.0.xsdHttp://www.springframework.org/schema/txHttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd ">Step two, beans with @transactional annotations are automatically configured fo

Summary of SPRINGMVC annotations@Configuration use a class as an IOC container, and one of its method headers, if registered with @bean, is used as the Bean in the spring container.@Scope Annotation Scopes@Lazy (True) indicates deferred initialization@Service for labeling business layer components,@Controller for labeling control-layer components, such as action in struts@Repository is used to label data access Components, or DAO components.@Component

In the development of the model layer in ASP. MVC5, the data annotations used have three functions: Data mapping (Maps the class of the model layer to the corresponding table using EntityFramework) Data validation (validation of data on server side and client) Data display (displays the corresponding data in the view layer) The following namespaces relate to data annotations: