java spring annotations tutorial

, we have a basic understanding of the annotation, the use of annotations and reflective type is inseparable. We can use the annotations in the code to indirectly control the operation of program code, which reads the annotation information through the Java reflection mechanism and changes the logic of the target program based on that information. But how do we u

Elementtype.type: Description class, interface, enum, annotation @RetentionDefines the duration of the annotation (source file, bytecode, run time).To illustrate the extent to which the annotations described are in effect.The value is unique, that is, one of the specific save policies, Retentionpolicy (enum).@Documented @retention (retentionpolicy.runtime) @Target (elementtype.annotation_type) public @Interface Retention { /** * Ret

Note: Because I am not accustomed to annotation way, so after the annotation here to achieve the basic configuration, after the annotation will not be taken out alone to explain. V: Spring Annotation 1. Preparatory work(1) Import Common-annotations.jar(2) Import schema file file name is Spring-context-2.5.xsd(3) Configuring in the Beans node of XML 2.xml Configuration Work Note: This configuration

20 Java-based spring annotation configuration (for some examples of annotations)Java-based configuration allows you to do most of your spring configuration, rather than through an XML file, with the help of a small number of Java

class:Package Cn.outofmemory.helloannotation;import Org.springframework.context.applicationcontext;import Org.springframework.context.annotation.annotationconfigapplicationcontext;import Org.springframework.context.support.classpathxmlapplicationcontext;public class App {public static void main ( String[] args) { //applicationcontext appContext = new Annotationconfigapplicationcontext (" Cn.outofmemory.helloannotation "); Note: Spring fetch

Java Spring Java config annotations Collation Traditional spring is generally configured based on xml, but many JavaConfig annotations are added later. In particular, springboot is basically a clear

This article focuses on the use of annotations in the Java Spring Framework, including a description of the Java bean definition, and the friends you need can refer to the 1. Using spring annotations to inject properties 1.1. How

Using Java code and annotations to complete the spring configurationUse Java code and annotations for spring configuration.Personal Understanding: You can use the XML file configuration when you use

are equivalent, but from the name of the annotation class it is easy to see that the 3 annotations correspond to the persistence layer, the business layer, and the control layer (the WEB layer), respectively. Although there is nothing new about these 3 annotations and @Component, Spring will add special features to them in future releases. Therefore, if a WEB ap

Turn from: http://www.ibm.com/developerworks/cn/webservices/ws-springjava/ Overview As we all know, the Spring framework is a driving factor in the control reversal (IOC) or Dependency injection (DI) pattern, which is implemented through a container based configuration. In the past, Spring allows developers to use xml-based configurations to manage bean dependencies by leveraging application context XML fil

org.springframework.context.annotation.Scope;import org.springframework.stereotype.Service;@Service@Scope("prototype")//声明Scope为Prototypepublic class DemoPrototypeService {}3GT; Configuration classpackage com.wisely.highlight_spring4.ch2.scope;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;@Configuration@ComponentScan("com.wisely.highlight_spring4.ch2.scope")public class ScopeConfig {}4> runpackage com.wisely.highlight_spr

Java annotations provide information about the code and have no direct impact on the annotated code structure. In this tutorial, we'll learn about Java annotations, how to write custom annotations, how

Based on Java configuration options, you can write most of the spring without configuration XML, but with the help of several Java-based annotations explained. Starting with Spring3.0, we support the use of Java code instead of XML to configure

JDK comes with annotations @Override means that the current method overrides the parent class @Deprecation Indicates that the method is obsolete , There is a horizontal line on the method, and a warning is used @SuppviseWarnings Indicates closing some warning messages ( notifies the Java compiler to ignore specific compilation warnings )

(NewStandardpasswordencoder ("53cr3t"))//Password Encryption Method ;//auth.inmemoryauthentication ()//Built-in Users//. withuser ("user"). password ("user") . roles (" user"); }}There are a few points to note that if you configure spring security based on javaconfig and annotations in an xml-configured SPRINGMVC environment, you only need to ensure that the