页面重定向到servlet,可以再由servlet请求转发吗

sunshiwu66 2012-04-15 10:46:26

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sunshiwu66 2012-04-15

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经过多次跳转报错为：java.lang.IllegalStateException: Cannot forward after response has been committed
求高手指点：不胜感激！

一、注册检验servlet代码：
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Md5code mc=new Md5code ();//MD5加密
response.setContentType("text/html");
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
UserOperateImpl io=new UserOperateImpl();
Userinfo ui=new Userinfo();
String username=request.getParameter("username");
String userpass=request.getParameter("userpass");
String confirm=request.getParameter("confirmpass");
String useremail=request.getParameter("email");
String code=(String)request.getSession().getAttribute("validateCode");
String codeshus=request.getParameter("codeshu");
String codeshu = URLDecoder.decode(codeshus, "UTF-8");
if(!codeshu.equals(null)&&!"".equals(codeshu)){
if(code.equals(codeshu)){
out.write(""+"√"+"");
if(!username.equals(null)&&!"".equals(username)){
if(!userpass.equals(null)&&!"".equals(userpass)){
if(userpass.equals(confirm)){
if(!useremail.equals(null)&&!"".equals(useremail)){
String memail=mc.getMD5ofStr(useremail);//MD5加密
String muserpass=mc.getMD5ofStr(userpass);//MD5加密
ui.setUsername(username);
ui.setUserpass(muserpass);
ui.setUseremail(memail);
try {

if(io.queryusername(ui)){
out.print("用户名已存在！");
}else if(io.queryuseremail(ui)){
out.print("邮箱已存在！");
}else{
boolean bl=io.saveObject(ui);
if(bl){
io.queryconfirm(ui);
request.getSession().setAttribute("userid", ui.getUserid());
request.getSession().setAttribute("user", username);
request.getRequestDispatcher("zhuceforward.jsp").forward(request, response);
//response.sendRedirect("zhuceforward.jsp");

}
}
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
}
}
}else{
out.write(""+"验证码错误！"+"");
}
}else{
out.write(""+"请输入验证码！"+"");
}

out.flush();
out.close();
}

二、
zhuceforward.jsp代码：
就是一秒后跳转功能：
<body >
<center>
 注册成功! 1秒后跳转
</center>
<script type="text/javascript">
var second = document.getElementById("totalSecond").textContent;
if (navigator.appName.indexOf("Explorer") > -1)
{
second = document.getElementById("totalSecond").innerText;
} else
{
second = document.getElementById("totalSecond").textContent;
}

setInterval("redirect()", 1000);
function redirect()
{
if (second < 0)
{
window.location="Toindex";
} else
{
if (navigator.appName.indexOf("Explorer") > -1)
{
document.getElementById("totalSecond").innerText = second--;
} else
{
document.getElementById("totalSecond").textContent = second--;
}
}
}
</script>
</body>

三、servlet Toindex中代码：

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
request.getRequestDispatcher("index.jsp").forward(request,response);
//response.sendRedirect("index.jsp");
}