Spring Applicationcontextaware Get context

First, Applicationcontextaware use

Spring provides the Applicationcontextaware class, through which you can get all the bean contexts.

Second, how to use?

①, define a tool class, to implement Applicationcontextaware, implement Setapplicationcontext method can

 Public classSpringcontextutilImplementsApplicationcontextaware {Private StaticApplicationContext ApplicationContext;//Spring Application Context Environment@Override Public voidSetapplicationcontext (ApplicationContext ApplicationContext)throwsbeansexception {springcontextutil.applicationcontext=ApplicationContext; }    /*** Get the object * *@paramname *@returnObject An instance of the bean registered with the given name *@throwsbeansexception*/     Public StaticObject Getbean (String name)throwsbeansexception {returnApplicationcontext.getbean (name); }}

②, business code

 Public Interface Userreadservice {    public  UserInfo Getuserinfobyid (Long ID);} @Component ("Userreadservice")publicclassimplements  Userreadservice {    @Override    public  UserInfo Getuserinfobyid (Long id) {        System.out.println ("Access to user Information")        ; return NULL ;    }}

③, XML configuration

<?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-4.1. XSD Http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spri Ng-context-4.1.xsd ">    <Context:annotation-config/>    <!--automatic scanning contains @service to inject it into a bean -    <Context:component-scanBase-package= "COM.MYCOMPANY.YUANMENG.SPRINGDEMO.AOP" />    <BeanID= "Springcontextutil"class= "Com.mycompany.yuanmeng.springdemo.aop.SpringContextUtil" /></Beans>

④, test

 Public Static void Test () {                new//  load ApplicationContext (simulated start Web Service), of course, if it is a Web project, It can be configured directly on the Web. XML and the container will load the file. = (userreadservice) springcontextutil.getbean ("Userreadservice");                                  Userreadservice.getuserinfobyid (null); }

Spring Applicationcontextaware Get context