Explain the implementation and application of Java Dynamic agent in detail

Explain the implementation and application of Java Dynamic agent in detail

In fact, Java dynamic proxy is not commonly used to write daily business code, but it is very common and important to work with the client of RPC framework at the framework layer. The core idea of spring and the underlying principle of AOP use the dynamic agent technology of Java.

Proxy can be used to realize the remote call of objects and the implementation of AOP.

The implementation of Java Dynamic Proxy mainly depends on invocationhandler (Interface) and proxy (class).

Here is an example

The implemented agent generally needs an interface

The class that implements the interface

Proxy class, which needs to implement the invacationhandler interface

Test class

The above is the basic use of Java dynamic proxy. The implementation of spring AOP and RPC remote server is more complex than this, which will be discussed in depth in the future.

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