Home > Developer > ASP

Jsp object details

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

1. Out object
It is mainly used to output data of various formats to the client and manage the output buffer on the application server. The base class of the Out object is the javax. servlet. jsp. JspWriter class.

Out Methods:
Out. println (DataType); or out. print (DataType );

Instance:
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
Import = "java. util .*"
%>
<HTML>
<HEAD>
<TITLE> instances used by out objects </TITLE>
</HEAD>
<BODY>
<%
Out. println (new Date (). toLocaleString ());
Out. print ("<BR> ");
Out. print ("test successful ");
%>
</BODY>
</HTML>

2. Request object
Request. setAttribute () and Request. getAttribute () method instances (you can also use forward to establish a Request relationship ):

Home page:

<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
%>
<% @ Include file = "1.jsp" %>
The content you just entered is:
<% = Request. getAttribute ("gr") %>

Introduction page:
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
Import = "java. util .*"
%>
<HTML>
<HEAD>
<TITLE> request object instance </TITLE>
</HEAD>
<BODY>
<%
Request. setAttribute ("gr", "123333 ");
%>
</FORM>
</BODY>
</HTML>

Request. getParameter () Method Instance

Home Page
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
Import = "java. util .*"
%>
<HTML>
<HEAD>
<TITLE> request. getParameter () method using an instance </TITLE>
</HEAD>
<BODY>
<Form method = post action = "2.jsp">
<Input type = "text" NAME = "gr1"> <BR>
<Input type = "text" NAME = "gr2"> <BR>
<Input type = "text" NAME = "gr3"> <BR>
<Input type = "submit" NAME = "submit" value = "submit">
<Input type = "reset" NAME = "reset" value = "clear">
</FORM>
</FORM>
</BODY>
</HTML>

Introduction page
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
%>
The content you just entered is: <BR>
<% = Request. getParameter ("gr1") %> <BR>
<% = Request. getParameter ("gr2") %> <BR>
<% = Request. getParameter ("gr3") %> <BR>

Request. getParameterName () Method Instance

Home Page
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
%>
<HTML>
<HEAD>
<TITLE> request. getParameterName () method using an instance </TITLE>
</HEAD>
<BODY>
<Form method = post ACTION = "2.jsp">
<Input type = "text" NAME = "gr1"> <BR>
<Input type = "text" NAME = "gr2"> <BR>
<Input type = "text" NAME = "gr3"> <BR>
<Input type = "submit" value = "submit">
<Input type = "reset" value = "clear">
</FORM>
</FORM>
</BODY>
</HTML>

Point to page
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
Import = "java. util .*"
%>
The content you just entered is: <BR>
<%
Enumeration e = request. getParameterNames ();
While (e. hasMoreElements ()){
String parameterName = (String) e. nextElement ();
String parameterValue = (String) request. getParameter (parameterName );
Out. print ("parameter name:" parameterName "<BR> ");
Out. print ("parameter content:" parameterValue "<BR> ");
}
%>

Request. getAttributeName () Method Instance

Home page:
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
Import = "java. util .*"
%>
<HTML>
<HEAD>
<TITLE> request. getAttributeName () method using an instance </TITLE>
</HEAD>
<BODY>
<Jsp: include page = "2.jsp" flush =" true "/>
<%
Enumeration e = request. getAttributeNames ();
While (e. hasMoreElements ()){
String attributeName = (String) e. nextElement ();
String attributeValue = (String) request. getAttribute (attributeName );
Out. print ("variable name:" attributeName );
Out. print ("variable content:" attributeValue "<BR> ");
}
%>
</FORM>
</FORM>
</BODY>
</HTML>


Redirection page
<% @ Page language = "java"
ContentType = "text/html; charset = gb2312"
%>
<%
Request. setAttribute ("gr1", "111 ");
Request. setAttribute ("gr2", "222 ");
Request. setAttribute ("gr3", "333 ");
%>

Request. getRemoteAddr () method instance:

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
jsp book jsp 6161 jsp editor jsp quiz jsp language jsp tie hosting details
Related Article
ASP. NET core combined with consul cluster &docker to rea...
ASP. NET Core SignalR uses a generic hub to gracefully invoke...
ASP. NET Core 2.0 leverages Masstransit integrated RABBITMQ
Integration testing of ASP. NET Core Webapi using Xunit
CKEDITOR + CKFINDER image upload configuration (C #/asp.net/php)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More