"Sping Revelation" 3, the bean in the spring container is the default is to keep an instance

The bean in the spring container is persisted to an instance by default

Here to do a test, the base code

 PackageCn.cutter.start.provider;ImportOrg.springframework.context.ApplicationContext;ImportOrg.springframework.context.support.ClassPathXmlApplicationContext;Importorg.springframework.stereotype.Component; @Component (Value= "Fxnewsprovider") Public classFxnewsprovider {//A variable is used to monitor whether the values between 2 object beans are consistent to confirm whether an object    Private inttestspring;  PublicFxnewsprovider () {System.out.println ("Hello IOC"); ++testspring; }              Public Static voidMain (string[] args) {ApplicationContext ctx=NewClasspathxmlapplicationcontext ("Configuration file path"); Fxnewsprovider Fxnewsprovider= (Fxnewsprovider) ctx.getbean ("Fxnewsprovider"); }     Public intgettestspring () {returntestspring; }     Public voidSettestspring (inttestspring) {         This. testspring =testspring; }        }

Test Case:

@Test Public voidtest2 () {//to test spring's IOC container, the default is to keep only one instance of the IOC containerApplicationContext CTX =NewClasspathxmlapplicationcontext ("Classpath:application-bean.xml"); Fxnewsprovider Fxnewsprovider= (Fxnewsprovider) ctx.getbean ("Fxnewsprovider"); System.out.println ("Get value First:" +fxnewsprovider.gettestspring ()); Fxnewsprovider FxNewsProvider2= (Fxnewsprovider) ctx.getbean ("Fxnewsprovider"); System.out.println ("Second Fetch value:" +fxnewsprovider2.gettestspring ()); Fxnewsprovider2.settestspring (998); if(FxNewsProvider2 = =Fxnewsprovider) {System.out.println ("Two times objects, the value is:" +fxnewsprovider.gettestspring ()); } Else{System.out.println (fxnewsprovider.gettestspring ());        System.out.println (Fxnewsprovider2.gettestspring ()); }            }

Finally, let's take a look at the test results

As expected in the book ...

"Sping Revelation" 3, the bean in the spring container is the default is to keep an instance