For request.getParameter httprequrest's () role,
Substantially as follows:
<form Action = "xxxxxxx.do">
<the INPUT name = "name" value = "ha ha" />
<the INPUT of the type = "the Submit" value = "submit" />
</ form>
after this form to submit a request, you the action in
String name = request.getparameter ( "name" );
then the value is the name of "ha"
it is a method to take parameters. Jsp to read the data file to it. Then it can be encapsulated utilized.
Look here:
<body>
<form action="${pageContext.request.contextPath }/login.action" name="frmLogin" method="post">
用户名： <input type="text" name="name"> <br/>
密码： <input type="text" name="pwd"> <br/>
<input type="submit" value="登陆"> <br/>
</form>
</body>
</html>
Jsp content out of it, and then encapsulated into setName method implemented User class is further encapsulated.
1 // data acquisition request, encapsulating
String name = request.getParameter ( "name");
String pwd = request.getParameter ( "pwd");
the User User new new = the User ();
user.setName (name);
User. setPwd (pwd);