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This article will explain in detail about whether spring is a singleton by default. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

The default for Bean is singleton.

If you do not want a singleton, you need to configure as follows:

Singleton is to configure whether the bean is singleton, if not written, it is the default value of true.

Notes:

Spring Bean lifecycle

The scope of 1.Bean can be set through the scope attribute of the Bean tag, and the scope of Bean includes:

By default, scope= "singleton", then the Bean is a singleton, and anyone who gets the Bean instance is the same instance.

Scope= "prototype", any instance is a new instance

Scope= "request", in WEB applications, the scope of each instance is request

Scope= "session", in WEB applications, the scope of each instance is session

Note: by default, the Bean instance is instantiated when it is initialized by the Spring container, and the constructor with no parameters is called by default. In other cases, the Bean will not be instantiated until the instance is obtained.

2.Bean can specify the method to be executed after initialization by specifying the property init-method, and the method to be executed when it is destroyed by specifying the property destroy-method.

Syntax:

This is the end of the article on "is spring a singleton by default?". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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