Technology point 6: Tomcat server

Tomcat

One 、JavaWeb The concept of

1、 What is? JavaWeb

JavaWeb Refer to , All through Java Language programming can be accessed through the browser , It's called JavaWeb.

JavaWeb It's based on requests and responses .

2、 What is a request

Request means that the client sends data to the server , Call for a request Request.

3、 What is response

Response means that the server returns data to the client , It's called response Response.

4、 The relationship between request and response

Requests and responses come in pairs , There is a response to a request .

 

 

  Two 、Web Classification of resources

web Resources vary according to the technology implemented and the effects presented , It is divided into static resources and dynamic resources .

Static resources ： html、css、js、txt、mp4 video , jpg picture

Dynamic resources ： jsp page 、Servlet Program

3、 ... and 、 frequently-used Web The server

Tomcat： from Apache An organization provides a kind of Web The server , Provide right jsp and Servlet Support for . It's a lightweight javaWeb Containers （ The server ）, It's also the most widely used JavaWeb The server （ free ）.

Jboss： It's a compliance JavaEE canonical 、 Open source 、 pure Java Of EJB The server , It supports all JavaEE standard （ free ）.

GlassFish： from Oracle Developed by the company JavaWeb The server , It's a robust business server , Achieve product quality （ Very few applications ）.

Resin： yes CAUCHO Products of the company , It's a very popular server , Yes servlet and JSP Provides good support , The performance is also better ,resin Self adoption JAVA Language development （ charge , A lot of applications ）.

WebLogic： yes Oracle Products of the company , Is currently the most widely used Web The server , Support JavaEE standard , And constantly improve to adapt to new development requirements , Suitable for large projects （ charge , With a few , For big companies ）.

Four 、Tomcat The server and Servlet Version correspondence

Current enterprise commonly used version 7.*、8.*.

 

 

 

Servlet The program from 2.5 Version is the most widely used version in the world （xml To configure ）

here we are Servlet3.0 after . It's the annotated version Servlet Use .

With 2.5 Version for the main line to explain Servlet Program .

5、 ... and 、Tomcat Use

1、 install

Find what you need Tomcat The version corresponds to zip Compressed package , Unzip to the directory you need to install .

 

 

 2、 catalogue

 

 

 3、 How to start Tomcat The server

The first way ：

find Tomcat In the catalog bin In the catalog startup.bat file , double-click , You can start it Tomcat The server .

 

 

  The second way ：

① Open the command line ;

② Switch to Tomcat Of bin Under the table of contents ;

③ Enter the start command ：catalina run

 

 

 4、 How to test Tomcat Successful launch ？

Open the browser , Enter the following address in the browser address bar to test ：

①http://localhost:8080

②http://127.0.0.1:8080

③http:// real ip:8080

The following interface appears , Indicating successful startup .

 

 

 

Be careful ： If it starts , The command line black window flashed past , Description no configuration JAVA_HOME environment variable , Configure as required JAVA_HOME that will do .

5、Tomcat The stop of

① Click on the ×

② take Tomcat The window of is placed in the current window ,CTRL+C stop it

③ find Tomcat Of bin In the catalog shutdown.bat, Double click to stop Tomcat The server .

6、 How to modify Tomcat Port number

find Tomcat In the catalog conf Catalog , find server.xml The configuration file .

 

 

  find Connector label , modify port Property value is enough .

 

 

 

7、 How to feel the heat web Project to Tomcat in

The first way ：

hold web Copy the project directory to Tomcat Of webapps Under the directory .

① stay webapps Create one in the directory book engineering ：

 

 

 ② take book Copy the project resources to book Under the table of contents ：

 

 

 ③ How to access the Tomcat Under the web engineering ：

Browser address bar input ：http://ip:port/ project name / Catalog / file name

 

 

 

The second way ：

find Tomcat Under the conf Catalog \Catalina\localhost\ Next , Create the following configuration file ：

 

 

  book.xml The contents of the configuration file are as follows ：

 

 

  take book Copy the project to D:\book Next ：

 

 

  visit ：http://localhost:8080/book/index.html, It means to visit D:\book\index.html Catalog .

 

 

 

8、ROOT A visit to the project , as well as Default index.html Page access

 

 

 

6、 ... and 、IDEA Integrate Tomcat The server

open idea Settings page of , The operation is as follows ：

 

 

 

Configure your Tomcat The installation directory ：

 

 

See if the configuration is successful ：

 

 

 

 

 

 

7、 ... and 、IDEA middle voice web The operation of the project

1、IDEA How to create dynamic web engineering

Create a module ：

 

 

  Choose what type of module you want to create ：

 

 

  Enter your module name , Click on finish complete ：

 

 

  Successfully created the following figure ：

 

 

 

2、Web Introduction to the project catalogue

 

 

 

3、 How to give dynamic web The project adds extra jar package

① stay WEB-INF Create one in the directory lib Catalog （ Used to store third parties jar package ）：

 

 

 

 

 

 

 

 

  ② What will be needed jar Package copy to lib Under the table of contents ：

 

 

  ③ Will these jar Package added to classpath ：

 

 

 

 

 

  Browse , choice lib All under directory jar package ：

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  Add the classpath successfully, as shown in the figure below ：

 

 

4、 How to be in IDEA Central government department works to Tomcat Up operation

modify web The project corresponds to Tomcat Operation example ：

 

 

 

  Confirm your Tomcat The instance contains the one that you want to deploy and run web Engineering module ：

 

  Modify the project path ：

 

 

 

  Other operations that need to be modified ：