1 JavaWeb into the world of technology: the origin of the Web back-end and J2EE

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Java Web is synonymous with many technical summary form, expand it to include very much related technologies.

Java development for 20 years, now has more than just a simple language, but rather a complete ecosystem, which terms like HTML, XML, CSS, Javascript, AJAX, JQuery, Prototype, HTTP, Tomcat, JBoss, nginx, Memecached, Redis, MVC, Servlet, JSP, Struts, Hibernate, myBatis, Spring, JFinal, MySql, JDBC, EJB, JMS, Swing, AWT, Reflection, OSGi ... pavement from, do you Touyunnaozhang , confused, easily the Lost.

 

Here put an online learning road map, albeit outdated, but still has some reference value.

 

 

In fact, in the past, JavaWeb development requires both front and rear, Java programmers should be front-end technology, such as the above html css and js, etc., and the presentation layer still using jsp, rendered in the back-end, front-end technology rapidly and now development, front-end can be completed in your own template rendering, so the gradual separation of the front and rear end, back-end programmers only need to provide json data interface can be, are they do not need to be responsible for rendering templates.

 

Ever since the content did a lot less important, but a complete Java web project more or less of these technologies will be used, so there are some basic things after so many years have not changed, such as servlet, such as jdbc and so on.

 

 

作为Java后端程序员,更加关注的是业务逻辑的开发以及服务端技术的学习,所以这里我们参考许令波老师的《深入分析JavaWeb技术内幕》,JavaWeb的技术体系大概可以分为以下几个部分。

 

即第一部分是web开发的基础知识,第二部分是Java的核心技术,第三部分是Java服务端的技术。

 

这里按照我自己的理解挑选本书比较核心的章节作为知识脉络。

 

0 JavaSE基础

既然使用Java语言做web开发,首先必须掌握的就是Java的核心技术,可以参考我的专栏文章:深入Java核心技术

 

1 web请求流程

这部分包括了http的基本知识,以及计算机网络相关基础知识,将在网络专栏详细介绍。

 

2 JavaIO技术

这部分包括了JavaIO的基本知识以及NIO的相关知识,这部分知识可以参考我的专栏:Java网络编程与NIO,其中详细了介绍NIO的相关知识。

 

3 Java Web中的中文编码问题

这部分虽然内容不多但是深究起来还是一块比较重要的内容,后续会在补充。

 

4 JVM基础,class字节码,类加载机制,javac编译原理等

这部分主要是JVM相关的技术内容,会在我的专栏: 深入理解JVM虚拟机 中陆续发表。

 

5 servlet,jsp , jdbc,session,cookie,Tomcat,jetty等,都是java web服务端的核心技术,将在本系列文章中讲述。当然在此之前最好看一下之前的内容,特别是Java网络编程和NIO的内容,是奠定后面内容学习的基础。

 

6 Spring,SpringMVC以及mybatis,velocity等内容,是在之前基础上设计出来的框架和模板技术,也是现在比较流行的技术。Spring相关的内容会在专栏 Spring源码解析 中详细介绍。而mybatis和velocity的内容会在本系列文章中放出。

 

7 另外,在Javaweb开发过程中常用到的Maven,git,甚至是ide等工具,也会有所介绍。

 

但是在此之前,我想说,学习这些技术基础,不妨先了解一下这些技术的历史,以及他们为什么产生,为什么消亡,了解一下过去的开发流程和现在的开发流程有何却别,产生这些变化的原因是什么,为什么会出现这些框架,为什么程序员会被区分为前端和后端。带着这些问题,在本专栏的前几章,你会找到答案。

 


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