What to learn about Java web

When I first wanted to learn javaweb development, I hoped to learn all aspects (so that I would be confident when looking for a job). But I don’t understand this at all, and I don’t know anyone who is engaged in this field, so I have no way to start learning. After a year of "dead" study, I have a deep understanding of Java from the Internet, books, and videos. Friends who want to engage in Java, as long as they learn all these technologies, they will definitely have no problem finding a job.

The first stage: Java basics, including java syntax, object-oriented features, common APIs, and collection frameworks; (Basic)

The second stage: java Interface programming, including AWT, event mechanism, SWING, (not commonly used) this part can also be skipped, you can see it again when you use it;

The third stage: java API: input and output, multi-threading , network programming, reflection annotations, etc., the essence of java (key points);

The fourth stage: database SQL basics, including add, delete, modify and query operations and multi-table queries; Oracle Mysql

The fifth stage Stage: JDBC programming: including JDBC principles, JDBC connection library, JDBC API. Although Hibernate is now much more convenient than JDBC, JDBC technology is still in use, and JDBC thinking is particularly important;

The sixth stage: In-depth understanding of JDBC Advanced features: including database connection pool, stored procedures, triggers, CRM thinking (advanced), this is difficult to understand, you can learn it if you have time;

Stage 7: HTML language learning, including HTML tags, forms Tags and CSS, which are the basis of Web application development;

The eighth stage: JavaScript scripting language, including javaScript syntax and objects, Ajax basics; these two aspects;

The eighth stage: Stage nine: Servlet development. From this point on, you will enter an important step in javaWeb development, including installation and use of XML, Tomcat server, simple understanding of HTTP protocol, Servlet API, etc., the foundation of java web development. (Important)

The tenth stage: JSP development: JSP syntax and tags, custom tags, EL, JSTL library understanding and the design pattern concept of the MVC three-tier architecture;

The eleventh stage ：AJAX development: AJAX principles, request response processing, AJAX development library, Jquery;

The twelfth stage: three major frameworks-struts, spring, hibernate, the essence of javaWeb (important)

The Thirteenth Stage: Learning other frameworks - springMVC, mybatis, currently more mainstream frameworks

The Fourteenth Stage: After learning this knowledge, you can learn some enterprise frameworks in depth, Maven, redis, log4j, etc.

The fifteenth stage: Generally, the system servers used by companies and enterprises today are Linux, so those who are interested can learn the various commands of Linux

Learning requirements

java Basic programming mastery: Proficient. Reason: If you don’t know Java, can you write JSP? Just kidding.

You must also be very familiar with the following packages:
java.lang;
java.util;
java.io;
java.sql ;
java.text;
javax.sevrlet;
javax.servlet.http;
javax.mail; etc.

2: sql mastery level: Proficiency. Reason: If you don't use a database you probably don't need to know sql. At the same time, you must be familiar with more than one SQL in the following databases. Oracle,Mysql,DB2...

3:html Mastery level: Proficient. Reason: Don’t know html. Maybe you can write JSP?

4:javascript/jscript: Mastery level:Familiar. Reason: Client-side data verification and some page processing require you to use scripts.

5: CSS mastery: Familiarity. Reason: CSS is usually used to unify page styles.

6: xml mastery level: Understand the reason: AppServer configuration is generally implemented using XML.

7: ejb mastery: Reason for understanding: Business logic in many projects is implemented by ejb, so...

8: The following Kinds of AppServer(engnier) You need to know more than one.

a:)Tomcat

b:)WebLogic

c:)WebSphere

d:)Jboss

Related learning recommendations: java basic tutorial

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