对于localhost:8080/user,request.getRequestURI();会返回什么
时间: 2024-02-13 14:03:40 浏览: 23
对于请求localhost:8080/user,request.getRequestURI()会返回"/user"。其中,getRequestURI()方法返回请求的URI(统一资源标识符),包括路径和查询参数(如果有的话)。在这个例子中,URI是"/user",它表示请求的是服务器上的"/user"路径。
相关问题
http://www.jt.com/user/logout.html ,拦截.html后缀
你可以使用URL重写(URL Rewriting)技术来实现这个功能。具体实现方法如下:
1. 在web.xml文件中配置一个Filter,用于拦截以.html结尾的请求:
```
<filter>
<filter-name>urlRewriteFilter</filter-name>
<filter-class>com.example.UrlRewriteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>urlRewriteFilter</filter-name>
<url-pattern>*.html</url-pattern>
</filter-mapping>
```
2. 编写UrlRewriteFilter类,实现doFilter方法:
```
public class UrlRewriteFilter implements Filter {
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
String path = httpRequest.getRequestURI().substring(httpRequest.getContextPath().length());
if (path.endsWith(".html")) {
String newPath = path.substring(0, path.length() - 5);
RequestDispatcher dispatcher = request.getRequestDispatcher(newPath);
dispatcher.forward(request, response);
} else {
chain.doFilter(request, response);
}
}
// 其他方法
}
```
这样,当用户访问"http://www.jt.com/user/logout.html"时,UrlRewriteFilter会拦截请求并将其转发到"/user/logout"路径,然后通过servlet处理该路径的请求并执行相应的逻辑。
http://www.jt.com/user/logout.html 我需要拦截:.html,然后访问:www.jt.com/user/logout路径,应该怎么操作
你可以使用URL重写(URL Rewriting)技术来实现这个功能。具体实现方法如下:
1. 在web.xml文件中配置一个Filter,用于拦截以.html结尾的请求:
```
<filter>
<filter-name>urlRewriteFilter</filter-name>
<filter-class>com.example.UrlRewriteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>urlRewriteFilter</filter-name>
<url-pattern>*.html</url-pattern>
</filter-mapping>
```
2. 编写UrlRewriteFilter类,实现doFilter方法:
```
public class UrlRewriteFilter implements Filter {
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
String path = httpRequest.getRequestURI().substring(httpRequest.getContextPath().length());
if (path.endsWith(".html")) {
String newPath = path.substring(0, path.length() - 5);
RequestDispatcher dispatcher = request.getRequestDispatcher(newPath);
dispatcher.forward(request, response);
} else {
chain.doFilter(request, response);
}
}
// 其他方法
}
```
3. 在web.xml文件中配置一个servlet-mapping,将"/user/logout"路径映射到LogoutServlet:
```
<servlet>
<servlet-name>logoutServlet</servlet-name>
<servlet-class>com.example.LogoutServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>logoutServlet</servlet-name>
<url-pattern>/user/logout</url-pattern>
</servlet-mapping>
```
4. 编写LogoutServlet类,处理"/user/logout"路径的请求:
```
public class LogoutServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 处理登出逻辑
// ...
response.sendRedirect("http://www.jt.com/user/logout.html");
}
// 其他方法
}
```
这样,当用户访问"http://www.jt.com/user/logout.html"时,UrlRewriteFilter会拦截请求并将其转发到"/user/logout"路径,然后LogoutServlet会处理该路径的请求并执行相应的逻辑,最后将用户重定向回"http://www.jt.com/user/logout.html"页面。