Question

我正在尝试建立用户注册页面。

我的servlet看起来像这样

 package main.com.attempt.trial.servlet;
 import java.io.IOException;
 import java.util.logging.Logger;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;


 public class UserRegisterServlet extends HttpServlet{

public void doGet(HttpServletRequest request, HttpServletResponse response){
    Logger logger = Logger.getLogger("LOGGER");
    logger.info("doGet() called");
}

public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException{
    Logger logger = Logger.getLogger("LOGGER");
    String name = (String) request.getParameter("firstname");
    boolean isSuccess = true;
    logger.info("doPost() called");
    logger.info(name);
    if (isSuccess){
        response.sendRedirect("/userHomePage.html");
    }else{
        response.sendRedirect("/register.html");
    }
}

}

我正在尝试将用户重定向到另一个JSP页面或返回到注册页面，具体取决于注册是否成功。我将web页面映射到web.xml中，如下所示

<servlet>
    <servlet-name>UserRegisterServlet</servlet-name>
    <servlet-class>main.com.attempt.trial.servlet.UserRegisterServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>UserRegisterServlet</servlet-name>
    <url-pattern>/registerUser.serv</url-pattern>
</servlet-mapping>

<servlet>
    <servlet-name>UserRegisterPage</servlet-name>
    <jsp-file>/WEB-INF/jsp/register.jsp</jsp-file>
</servlet>
<servlet-mapping>
    <servlet-name>UserRegisterPage</servlet-name>
    <url-pattern>/register.html</url-pattern>
</servlet-mapping>

<servlet>
    <servlet-name>UserHomePage</servlet-name>
    <jsp-file>/WEB-INF/jsp/userHomePage.jsp</jsp-file>
</servlet>
<servlet-mapping>
    <servlet-name>UserHomePage</servlet-name>
    <url-pattern>/userHomePage.html</url-pattern>
</servlet-mapping>

如果我发送重定向到“/registerUser.serv”，servlet中的doGet（）方法会像我期望的那样被调用。 Tomcat不记录任何错误，local_host_access_log看起来也像我期望的那样。

 127.0.0.1 - - [28/Jul/2014:14:45:20 -0700] "GET /register.html HTTP/1.1" 200 1576 
 127.0.0.1 - - [28/Jul/2014:14:45:20 -0700] "GET /content/jquery-2.1.1.js HTTP/1.1" 304 - 
 127.0.0.1 - - [28/Jul/2014:14:45:22 -0700] "POST /registerUser.serv HTTP/1.1" 302 - 
 127.0.0.1 - - [28/Jul/2014:14:45:22 -0700] "GET /userHomePage.html HTTP/1.1" 200 433

所以，似乎服务器端一切正常，但浏览器根本不知道它需要转到另一个页面。此外，如果我尝试重定向到JSP页面，静态HTML页面，或者如果我使用相对或绝对路径，则无关紧要。

有任何帮助吗？提前谢谢。

使浏览器知道HttpServletResponse sendRedirect

0 个答案: