Servlet and Request Header

1.ServletCall

1.PassURLDirect call

2.<Servlet> </servlet>Call

3.<Form> </form>Tag call

4.InJSPFile call

<JSP: Include page = "/servlet/myservlet" Flush = "true ""

2.HTTPRequest Header

Accept:Acceptable BrowserMimeType

Accept-charset:Acceptable Character Set of the browser

Accept-encoding:The data encoding method that the browser can decode, suchGzip.

Accept-language:Types of languages that the browser wants

Authorization:Authorization information

Connection:Indicates whether a persistent connection is required.

Content-Length:Length of the Request Message Body

COOKIE:Request Header Information

From:Request sender'sEmailAddress.

Host:InitialURLHost and port in

If-modified-since:It is returned only when the requested content is modified after the specified date. Otherwise, it is returned.Not modifiedResponse

Pragma:Specify"No-Cache"Value Indicates that the server must return a refreshed document, even if it has a proxy server and a local copy of the leaf surface

Referer:ContainsURL,User FromURLRepresentative page to ask the current request page

User-Agent:Browser type

UA-pixels, UA-color, UA-OSAndUA-CPU:Non-standard request header, indicating screen size, color depth, operating system andCPUType.

3.HTTPResponse Header

Setcontenttype:SetContent-TypeHeader. MajorityServletThis method is required.

Setcontentlength:SetContent-LengthHeader. For persistentHTTPFor connected browsers, this function is very useful.

Addcookie:SetCookie

Allow:Request methods supported by the server

Content-encoding:Document encoding method

Content-Length:

Content-TypeIndicates what the following document belongsMimeType.

Date:CurrentGMTTime

Expired:When should the document be expired and no longer cached.

Last-modified:The last modification time of the document.

Location:Indicates where the customer should extract documents.LocationUsually not directly set InsteadHttpservletresponseInSerredirect ()Method, and set the status code302

Refresh:Indicates the time after which the browser should refresh the page.

Server:Server name.

Set-COOKIE:SetCookie

WWW-AuthenticateThe customer shouldAuthenticateWhat type of authorization information should be provided in the cast?.