Injection injection of Spring annotation container

Premise: Spring has been deployed (refer to the previous article: Web project Deployment Spring Bean Factory)

One: New dependent jar Package

1:spring-aop-4.1.6.release.jar (required when modifying beans attribute in Applicationcontext.xml)

Two: Web. xml unchanged, modify Applicationcontext.xml

1: Remove DTD (<! DOCTYPE beans Public "-//spring//dtd BEAN 2.0//en" "Http://www.springframework.org/dtd/spring-beans-2.0.dtd" >)

2: New beans Attribute (xmlns,xmlns:xsi,xmlns:context,xsi:schemalocation)

3: Remove <bean/> container injection, change to annotation scan injection

4: Remove the association injection between <bean/>, modify it as annotation auto-injection

Three: Spring container class with annotation injection

1: Inject spring container (@Component, @Controller, @Service, @Repository)

The 2:spring container is injected into the bean (@Resource (name= "xxx"), @Autowired)

Ps:

1:applicationcontext.xml

<?XML version= "1.0" encoding= "UTF-8"?><Beansxmlns= "Http://www.springframework.org/schema/beans"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"Xmlns:context= "Http://www.springframework.org/schema/context"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5 . xsd Http://www.springframework.org/schema/context http://www.springframework.org/schema/context/s Pring-context-2.5.xsd ">    <Context:annotation-config/>    <!--Insert a container according to the annotation scan class -    <Context:component-scanBase-package= "Dao,service" />    <!--Upgrade: Annotations, auto-injection -    <Beanclass= "Org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" /></Beans>

2:servlet unchanged, service (STUDENTSERVICEIMPL)

 PackageService;ImportJavax.annotation.Resource;ImportOrg.springframework.stereotype.Service;ImportDAO. Studentdao;Importentity. Student; @Service ("Studentservice") Public classStudentserviceimplImplementsStudentservice {@Resource (name= "a")    PrivateStudentdao Studentdaot;  Public voidinsertstudent (Student Student) {Studentdaot.insert (Student); }}

3:dao (Studentdaoimpl)

 PackageDAO;Importjava.sql.Connection;ImportJava.sql.DriverManager;Importjava.sql.SQLException;Importjava.sql.Statement;ImportJava.text.SimpleDateFormat;Importorg.springframework.stereotype.Repository;Importentity. Student; @Repository (A) Public classStudentdaoimplImplementsStudentdao { Public voidInsert (Student Student) {Try{class.forname (driver); Connection Con=drivermanager.getconnection (Url,username,password); Statement SQL=con.createstatement (); SimpleDateFormat SDF=NewSimpleDateFormat ("Yyyy-mm-dd HH:mm:ss"); Sql.execute ("Insert student (Name,math,create_time) VALUES ('" +student.getname () + "', '" +student.getmath () + "', '" +sdf.format ( Student.getcreatetime ()) + "')");            Sql.close ();        Con.close (); }Catch(java.lang.ClassNotFoundException e) {System.err.println ("ClassNotFoundException:" +e.getmessage ()); }Catch(SQLException ex) {System.err.println ("SQLException:" +ex.getmessage ()); }            }}

Injection injection of Spring annotation container