首先必须要通过一个Action再转向那个添加记录的页面,转向函数如下.
public ActionForward tokenTest(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
saveToken(request);//把一个token ID保存到Session,并在且要转到的页面
//的<html:form>中添加一个<input type="hideen">的标答.
return mapping.findForward("add");
}
一个输出入页面如容如下:
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
<html:base />
<title>tokentest.jsp</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<br>
<logic:present name="error">
<pre style="color:#ff2255"><bean:write name="error"/></pre>
</logic:present>
<center>
<html:form action="/insert.do" method="post">
<table border="0" cellspacing="0" >
<tr>
<td width="30%">用户名</td>
<td width="70%"><html:text property="username"/></td>
</tr>
<tr>
<td>地址:</td>
<td><html:text property="address"/></td>
</tr>
<tr>
<td colspan="2"><html:submit value="提交"/></td>
</tr>
</table>
</html:form>
</center>
</body>
</html:html>
页面的处理Action内容如下:
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
TokenTestForm tokenTestForm = (TokenTestForm) form;
if(!isTokenValid(request)){ //重复提交
request.setAttribute("error","不能得复提交!!!");
//saveToken(request); 重新生成tokenid,
return mapping.findForward("return");
}else{
resetToken(request);
}
//执行相关操作
System.out.println(tokenTestForm.getUsername()+"--"+tokenTestForm.getAddress());
return mapping.findForward("ok");
}
至此已完成,至于原理,就自己去查一些资料就完全明白了....
posted on 2006-04-09 15:21
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