Javaweb Learning (i)----HTTP and Tomcat installation and use

HTTP one, protocol

The two sides in the interaction, communication, the time to follow a specification, a rule.

Second, the HTTP protocol

The full name of HTTP is: Hypertext Transfer Protocol (Hypertext Transfer Protocol), a specification that is followed by the client and server side of the network when executing the HTTP protocol. In fact, the client is required to access the server when the need to send something, the server response to the client when the need to return something.

Iii. the difference between HTTP1.0 and HTTP1.1

In the HTTP1.0 protocol, after a client has established a connection with a Web server, only one Web resource can be obtained.

After the HTTP1.1 protocol allows a client to establish a connection with a Web server, multiple Web resources can be obtained on a single connection.

Iv. HTTP Requests

The requested data contains three parts: a request line, a request header, and a request body.
　　Request Lines : The request is: Post,, OPTIONS, DELETE, TRACE, PUT, commonly used are: GET, POST
The difference between get and post:

　　

Request Header :

        Accept:application/x-ms-application, Image/jpeg, Application/xaml+xml, Image/gif, Image/pjpeg, application/x-ms-x         BAP, */* referer:http://localhost:8080/examples/servlets/servlet/requestparamexample ACCEPT-LANGUAGE:ZH-CN user-agent:mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; trident/4.0; SLCC2;. NET CLR 2.0.50727;. NET CLR 3.5.30729;. NET CLR 3.0.30729; Media Center PC 6.0;. net4.0c;. net4.0e) content-type:application/x-www-form-urlencoded Accept-encoding:gzip, deflate Host:localho st:8080 content-length:31 connection:keep-alive Cache-control:no-cache----------------------------         -------------------------------------------------Accept: The client indicates to the server what type of data I can support.         Referer: True requested address path, full path Accept-language: Support language format user-agent: User agent indicates to the server that the current client information is being visited. Content-type: The submitted data type.         The data accept-encoding:gzip of the form form urlencoding encoded, deflate: compression algorithm.     Host: Hosting Address   Content-length: Data length connection:keep-alive stay connected Cache-control: operation on Cache 

Request body : HTML code

V. HTTP response

The requested data contains three parts: Response line, response header, response body.
　　

* Response Line            http/1.1-OK        Protocol version          Status code (JS explained in detail, here are only a few common)                    200: Success, normal processing, get data.            403  : For Bidden  deny            404:not Found            500: Server Exception * Response header server        :  What type of server is it?  Tomcat            Content-type: Server returned to client your content type        content-length: Data length returned date        : Date of communication, time of response    

Download and install TOMCAT1. Download Tomcat

Website address: http://tomcat.apache.org/whichversion.html

2. Install Tomcat

1. Unzip directly, then find Bin/startup.bat

2. can be installed

After startup, if you can see the black window properly, it indicates that the installation was successful. In order to ensure foolproof, it is best to enter in the address bar of the browser: http://localhost:8080, if you see the content indicates success.

3. If you double-click on the Startup.bat and see a flash of the situation, it is generally the JDK environment variable is not configured.

3.Tomcat Catalog

Bin

> contains some jar, bat files. Startup.bat
Conf

Tomcat configuration Server.xml Web. xml
Lib

The jar files required for Tomcat to run
Logs

Log files that are running
Temp

Temporary files
WebApps

The items that are published to the Tomcat server are stored in this directory.

Work (no tube at the moment)

JSP translated into a class file storage place

4. Publish a Web project using Tomcat

requirements: How to get other computers to access the resources on my computer. aa.html

    Browser address bar notation: localhost: Native address/project name/folder name/file name

copy this file to Webapps/root and access it in the browser:

        　Http://localhost:8080/stu.xml

         Access using IP address:
    
        http://192.168.5.437:8080/aa.html

Directory structure for 5.WEB applications

Use Myecplise to configure your own Tomcat

Step one, get the server running environment configuration, Window/preferences/server/runtime Environmen (each version of the location of different, looking for themselves)

Step two, click Add to select your own version of the Tomcat download, click Next

Step three, select your own Tomcat home folder click Finish

Step four, see if your Tomcat appears in the server

Step five, test your tomcat.

Step six, configure your own JSP project in Tomcat (how to create a Web project later)

Javaweb Learning (i)----HTTP and Tomcat installation and use