What is an EJB, a bird thing?

What exactly is EJB?

What exactly is EJB? By word of mouth, the mysterious secret of the God, Baidu, always feel no clear, still feel confused. Baidu has been a long time, but also from the network of articles in the words, gradually have a clue.

In layman's terms, EJB is: "The class of software that you write that needs to be executed is not put on the client software, but it is put into a package on a server." Yes! EJB is to put those "classes" on a server, in the form of C/S software client to the "class" on the server call. It's going to crash! Such a few sentences are very clear explanation of what EJB is (and I am in the it of tall people), and many articles are always dedicated to explain the EJB principle, EJB appearance meaning.

　　

Once again, this is a great effort to find the article address, blog post on the principle of EJB and the essence of the explanation is very clear: http://blog.csdn.net/jojo52013145/article/details/5783677

In addition, the emergence of EJB caused great controversy, here a quote, 04, a bit old, but its own views do a detailed elaboration: http://cache.baidu.com/c?m= 9f65cb4a8c8507ed4fece763105392230e54f7227796945468d4e419ce3b46111727feed7c63525483846b6776fc081efdf142226a5060e1c09e9f4ba bba993f2f8c7c62671df04019d41dabdf037881769f4d98ab0e93bbe74493b9a2d4c855239d0b55&p= 9972c35d85cc45fe0ebd9b780864&user=baidu&fm=sc&query=%c6%f3%d2%b5ejb&qid=92abc8ea09204a86& p1=10

　　

Where EJB is located in the architecture, for example, EJB in the development of Java EE in detail:

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What is an EJB thing?