0. Preface: Core Technologies

日期：2007年8月7日作者：查看:[大字体中字体小字体]

While building web applications, some Java developers will write their own HTML. Others leave that responsibility to the page designers.

For more about HTTP, HTML, and User Agents, see:
- Getting started with HTML by Dave Raggett
- HTTP Overview in the Java Web Services Tutorial.
- HTTP/1.1 Specification
- HTTP Basic and Digest Authentication Specification
- State Management Mechanism Specification (Cookies)

0.3 The HTTP Request/Response cycle

A very important part of HTTP for the web developer is the request/response cycle. To use HTTP you have to make a request. A HTTP server, like a web server, is then obliged to respond. When you build your web application, you design it to react to a HTTP request by returning a HTTP response. Frameworks like Struts abstract much of these nuts and bolts, but it is important to understand what is happening behind the scenes.

If you are not familiar with the HTTP request/response cycle, we strongly recommend the HTTP Overview in the Java Web Services Tutorial.

0.4 The Java Language and Application Frameworks

Struts is written in the popular and versatile Java programming language. Java is an object-orientated language, and Struts makes good use of many object-orientated techniques. In addition, Java natively supports the concept of threads, which allows more than one task to be performed at the same time. A good understanding of Java, and especially object-orientated programming (OOP) and threading, will help you get the most out of Struts and this User Guide.

For more about Java and threads, see