我也遇到以下问题,请各位高手。有两个JSP页面:
第一个JSPD页面的内容是:
<%@ page contentType="text/html; charset=GBK" %>
<html>
<head>
<title></title>
</head>
<jsp:useBean id="check" scope="session" class="phoneproject.CheckBean" />
<jsp:setProperty name="check" property="*" />
<%@ include file="top.jsp"%>
<%String name="";%>
<%
if(request.getParameter("username")==null || request.getParameter("password")==null){
name="你还末登录";
}
else{
String userName=check.getUsername();
boolean validate=check.userValidate();
if(validate==true){
session.setAttribute("userName",userName);
response.sendRedirect("Insertdata.jsp");
}
else{
name="用户名或密码错误";
}
}
%>
<form method="post">
<table width="445" border="0" align="center" cellPadding="0" cellSpacing="0">
<tr>
<td width="83">UserName:</td>
<td width="221"><input type="text" name="username" property="username" size="30"></td>
</tr>
<tr>
<td width="83">Password:</td>
<td width="221"><input type="password" name="password" property="password" size="30"></td>
<td width="70"><input type="submit" name="submit" value="确认"></td>
<td width="70"><input type="reset" name="reset" value="重置"></td>
</tr>
</table>
<table width="445" border="0" align="center" cellPadding="0" cellSpacing="0">
<tr>
<td>提示:<%=name%></td>
</tr>
</table>
</form>
</body>
</html>
第二个JSP页面相就内容是:
<jsp:useBean id="insert" scope="session" class="phoneproject.InsertDataBean" />
<jsp:setProperty name="insert" property="username" value="<%=(String)session.getAttribute("userName")%>" /> 问题是:第二个JSP不能把"username"的值(value="<%=(String)session.getAttribute("userName")%>" 传到JAVABEAN里面.在JAVABEAN里面打印username的值为NULL
第一个JSPD页面的内容是:
<%@ page contentType="text/html; charset=GBK" %>
<html>
<head>
<title></title>
</head>
<jsp:useBean id="check" scope="session" class="phoneproject.CheckBean" />
<jsp:setProperty name="check" property="*" />
<%@ include file="top.jsp"%>
<%String name="";%>
<%
if(request.getParameter("username")==null || request.getParameter("password")==null){
name="你还末登录";
}
else{
String userName=check.getUsername();
boolean validate=check.userValidate();
if(validate==true){
session.setAttribute("userName",userName);
response.sendRedirect("Insertdata.jsp");
}
else{
name="用户名或密码错误";
}
}
%>
<form method="post">
<table width="445" border="0" align="center" cellPadding="0" cellSpacing="0">
<tr>
<td width="83">UserName:</td>
<td width="221"><input type="text" name="username" property="username" size="30"></td>
</tr>
<tr>
<td width="83">Password:</td>
<td width="221"><input type="password" name="password" property="password" size="30"></td>
<td width="70"><input type="submit" name="submit" value="确认"></td>
<td width="70"><input type="reset" name="reset" value="重置"></td>
</tr>
</table>
<table width="445" border="0" align="center" cellPadding="0" cellSpacing="0">
<tr>
<td>提示:<%=name%></td>
</tr>
</table>
</form>
</body>
</html>
第二个JSP页面相就内容是:
<jsp:useBean id="insert" scope="session" class="phoneproject.InsertDataBean" />
<jsp:setProperty name="insert" property="username" value="<%=(String)session.getAttribute("userName")%>" /> 问题是:第二个JSP不能把"username"的值(value="<%=(String)session.getAttribute("userName")%>" 传到JAVABEAN里面.在JAVABEAN里面打印username的值为NULL
应该是(String)request.getAttribute("userName")吧?
out.print((String)session.getAttribute("userName"));
先看看能否得到值
if(validate==true){
session.setAttribute("userName",userName);
response.sendRedirect("Insertdata.jsp");
}
改为
if(validate==true){
session.setAttribute("userName",userName);
System.out.println(session.getAttribute("userName"));
response.sendRedirect("Insertdata.jsp");
}看看后台的打印结果?
m=(String)seeionl.getAttribute("userName");%>
<jsp:useBean id="insert" scope="session" class="phoneproject.InsertDataBean" />
<jsp:setProperty name="insert" property="username" value="<%=m%>" /> 你试一下这样应该可以行