Create two JSP pages: Reg.jsp and request.jsp
REG.JSP:
<%@ page language= "java" import= "java.util.*" contenttype= "text/html"; Charset=utf-8 "%>
<%@ page import= "java.text.*"%>
<%
String path = Request.getcontextpath ();
%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" >
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">
<title>insert title here</title>
<body>
<form action= "request.jsp" name= "LoginForm" method= "POST" >
<table>
<tr>
<td> User name:</td>
<td><input type= "text" name= "username"/></td>
</tr>
<tr>
<td> Hobby:</td>
<td>
<input type= "checkbox" Name= "favorite" value= "read"/> Reading
<input type= "checkbox" Name= "Favorite" value= "Yujia"/> Yoga
<input type= "checkbox" Name= "Favorite" value= "Fadai"/> Daze
</td>
</tr>
<tr>
<td> Show:</td>
<TD colspan= "2" ><input type= "Submit" name= "Commit"/></td>
</tr>
</table>
</form>
</body>
REQUEST.JSP:
<%@ page language= "java" import= "java.util.*" contenttype= "text/html; charset=utf-8"
%>
<% @page Import= "java.text.*"%>
<%
String path = Request.getcontextpath ();
%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd";
<meta http-equiv= "Content-type" content= "text/html; charset=utf-8";
<title >insert title here</title>
<body>
< %
Request.setcharacterencoding ("Utf-8");//solve Chinese garbled problem
%>
<!--username Returns a value, using Gerparameter, Hobby returns is an array of strings, with getparametervalues-->
User name: <%=request.getparameter ("username")%>
Hobbies: <%
string[] Favorites = request.getparametervalues ("favorite");
for (int i=0;i<favorites.length;i++)
{
Out.println (favorites[i]+ " ");
}
%>
</body>
Operation Result:
A little bit of a mistake in the middle:
(1) The Tomcat project was closed by me, so start the error, open Project can
(2) The reg.jsp <form action= "request.jsp" name= "LoginForm" method= "post" > Added a </form> so the following code is invalid, Mad Dot Submit Button did not respond, and finally with Firefox debugging found, continue to refuel.
Add a URL address to the reg.jsp to see the link
<body>
<form action= "request.jsp" name= "LoginForm" method= "POST" >
<table>
<tr>
<td> User name:</td>
<td><input type= "text" name= "username"/></td>
</tr>
<tr>
<td> Hobby:</td>
<td>
<input type= "checkbox" Name= "favorite" value= "read"/> Reading
<input type= "checkbox" Name= "Favorite" value= "Yujia"/> Yoga
<input type= "checkbox" Name= "Favorite" value= "Fadai"/> Daze
</td>
</tr>
<tr>
<td> Show:</td>
<TD colspan= "2" ><input type= "Submit" name= "Commit"/></td>
</tr>
</table>
</form>
<a href= "Request.jsp?username= Zhang Zhang" > test Zhang Zhang Account </a> <!--add URL --
</body>
When the username is in English normal display, when it is Chinese, display garbled, so you can get the script in request.jsp (below), unable to resolve the URL to pass the Chinese garbled problem
<%
Request.setcharacterencoding ("Utf-8");//solve Chinese garbled problem
%>
Resolved as follows:
Modify the Tomcat configuration file Server.xml, address: D:\Program files\eclipse\apache-tomcat-7.0.69\conf, add properties: uriecoding= "Utf-8", Reboot the Tomcat server to take effect
In addition, because add Url,url only user name, no hobby, pass the URL parameter only user name, no hobby, so in get hobby times null pointer exception, so in do traverse output hobby to add judgment (not equal to empty continue to execute code, equal to empty does not output), request.jsp output Hobby Part code changes:
Hobbies: <%
if (Request.getparametervalues ("favorite")!=null) {//Plus judgment
string[] Favorites = request.getparametervalues ("favorite");
for (int i=0;i<favorites.length;i++)
{
Out.println (favorites[i]+ " ");
}
}
JSP built-in Object---Request object (User login page (return value and array: gerparameter,getparametervalues))
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