Servlet Program:
The Dopost method is used in order to prevent a form from being submitted when the Post method is in question. Otherwise, only get requests can be processed
PackageOrg.lxh.servletdemo;ImportJava.io.* ;Importjavax.servlet.* ;Importjavax.servlet.http.* ; Public classInputservletextendshttpservlet{ Public voiddoget (httpservletrequest req,httpservletresponse resp)throwsservletexception,ioexception{String Info= Req.getparameter ("info");//assuming the parameter name is infoPrintWriter out =Resp.getwriter (); Out.println (") ; Out.println (") ; Out.println ("<body>") ; Out.println (") ; Out.println ("</body>") ; Out.println (") ; Out.close (); } Public voiddoPost (httpservletrequest req,httpservletresponse resp)throwsservletexception,ioexception{ This. Doget (REQ,RESP); }}
Web. XML configuration:
Add this statement: note the following path issues, because input.htm is under the Inputservlet folder.
<servlet> <servlet-name>input</servlet-name> <servlet-class> org.lxh.servletdemo.inputservlet</servlet-class> </servlet> <servlet-mapping > <servlet-name>input</servlet-name> <url-pattern>/inputservlet/inputservlet </url-pattern> </servlet-mapping>
Then create the form: The form path is under the Inputservlet folder
<HTML><HEAD><TITLE>WWW.MLDNJAVA.CN,MLDN High-end Java training </title> Please enter content:<input type= "text" name= "info" > < Input type= "Submit" value= "Submission" ></form></body>The above approach to setting the path in Web. XML is to avoid development. /the problem. Otherwise, you will need to use this statement in the form file above:
<form action= ". /inputservlet "method=" POST ">
Summarize:
1. Different request modes when forms are received: doget,dopost
2. Be sure to handle the routing problem when submitting a form
Servlet Program Development--servlet and forms
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
