Java EE Learning Record (i)--software system architecture

1 Common software system architecture b/ S/C

1.1　C/S

L/C structure is client / server (client/server), such as QQ;

L need to write server-side programs, as well as client programs, for example, we installed QQ client program;

L Disadvantage: Software updates need to update both client and server side at the same time, more trouble;

L Advantages: good security.

1.2　b/S(* * * *)

L/b structure is browser / server (browser/server);

L Advantages: only need to write server-side programs;

L Cons: Poor security.

2　WEB Resources

2.1　Web Resource Introduction

L HTML: static resources ;

L Jsp/servlet: dynamic resources.

of course, except Javaweb Program, there are other Web programs, such as:ASP,PHP and so on.

2.2 static resources and static resource differences

2.3 accessing Web Resources

Open Browser, enter URL:

L Protocol name :// domain : port / path, for example:http://www.127.0.0.1.cn:80/ Index.html

3　Web server

The purpose of the WEB server is to receive the client's request and respond to the client.

for Javaweb program, but also need to have jsp/servlet container,jsp/servlet The basic function of the container is to convert dynamic resources into static resources, of course Jsp/servlet container not only these features, we will learn at the back of 1.1 points.

What we need to use is Web servers and jsp/servlet containers, which are usually gathered together. The following are the javaweb servers:

L Tomcat(Apache): Currently the most widely used javaweb server;

L JBoss(Redhat Red Hat): Support java EE, the application is relatively broad;EJB container

L GlassFish(orcale):Oracle development javaweb Server, application is not very wide;

L Resin(caucho): Support java EE, the application is more and more wide;

L Weblogic(orcale): For money! Support java EE, suitable for large projects;

Websphere(IBM): It's for money! Support java EE, suitable for large projects;

Java EE Learning Record (i)--software system architecture