在下面这个文件中的if判断语句
if(name==""||email=="")
{
%>
<b><font color=red>Sorry,Please enter your name,email,and body!!!</font></b>
<%
response.sendRedirect("index.html");
}
不执行；但是
else
{
sql="insert into guestbook(name,email,url,body) values ('"+name+"','"+email+"','"+url+"','"+body+"')";
sqlbean.executeInsert(sql);
}
却执行，而且程序也不报错，这是为什么呢，大家帮忙分析一下吧，谢谢了！！
整个文件代码如下：
<%@ page language="java" import="java.sql.*" %>
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<head>
<META http-equiv="Content-Type" content="text/html;charset=UTF-8">
</head>
<body>
<jsp:useBean id="sqlbean" class="hh.Sql_data" scope="session" />
<%! String name,email,url,body,sql;%>
<%
request.setCharacterEncoding("UTF-8");
name=request.getParameter("name");
email=request.getParameter("email");
url=request.getParameter("url");
body=request.getParameter("body");
if(name==""||email=="")
{
%>
<b><font color=red>Sorry,Please enter your name,email,and body!!!</font></b>
<%
response.sendRedirect("index.html");
}
else
{
sql="insert into guestbook(name,email,url,body) values ('"+name+"','"+email+"','"+url+"','"+body+"')";
sqlbean.executeInsert(sql);
}
%>
<%
ResultSet RScount=sqlbean.executeQuery("SELECT * FROM guestbook");
int i=0;
while(RScount.next())
{
i++;
}
%>
<%--<p><a name=see><b>Now,<%=RScount %>Records.</b></a></p> --%>
<p><b>现在有<%=i%>条记录</b></p>
<%
RScount.close();
i=0;
%>
<p> </p>
<%
ResultSet RS=sqlbean.executeQuery("select * from guestbook");
while(RS.next())
{
name=RS.getString("name");
email=RS.getString("email");
url=RS.getString("url");
body=RS.getString("body");
%>
<table border=1 width=80%>
<tr>
<TD width=30%>昵称：</TD><TD width=70%><%=name%></TD>
</tr>
<TR>
<TD width=30%>电子邮件：</TD><TD width=70%><a href="maito:<%=email%>"><%=email%></a></TD>
</TR>
<TR>
<TD width=30%>个人主页地址：</TD><TD width=70%><a href="<%=url%>"><%=url%></a></TD>
</TR>
<TR>
<TD width=30%>内容：</TD><TD width=70%><%=body%></TD>
</TR>
</table>
<hr>
<%
}
RS.close();
%>
</body>
</html>
