jsp有控制验证的功能吗？
就像asp.net一样，可以控制一个文件夹中的内容，只有通过登陆才能访问，在.net中是在web.config配置的。不知道java有没有
说的具体些
------解决方案--------------------
Java 里是在web.xml配置。好像。
用Filter可以很好的控制。具体可以去搜一下。很多的。
下面是我的一个练手项目中的代码，你参考一下吧。很多代码是IDE生成的。我使用Java Studio Enterprise
8。
web.xml 部分配置
<filter>
<filter-name> VerifyAdminFilter </filter-name>
<filter-class> com.ustb.lab.businessLogic.VerifyAdminFilter </filter-class>
</filter>
<filter-mapping>
<filter-name> VerifyAdminFilter </filter-name>
<url-pattern> /cn/mng/* </url-pattern>
</filter-mapping>
------解决方案--------------------
VerifyUserFilter.java
内容太长了。发表不了。给出代码片段吧：
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
if (debug) log( "VerifyUserFilter:doFilter() ");
doBeforeProcessing(request, response);
Throwable problem = null;
try {
HttpServletRequest hrequest = (HttpServletRequest)request;
HttpServletResponse hresponse = (HttpServletResponse)response;
HttpSession loginsession = hrequest.getSession(false);
if (loginsession.getAttribute( "LogInlet.userName ") == null) {
//out.println( "please log in before trying to use this facility , click " + " <a href= \ "index.jsp\ "> click here to login! </a> ");
System.out.println( "Filter rejected, please go to the sign on page ");
hresponse.sendRedirect( "clublogin.jsp "); // go to the sign on page
}else{
chain.doFilter(request, response);
}
} catch(Throwable t) {
//
// If an exception is thrown somewhere down the filter chain,
// we still want to execute our after processing, and then
// rethrow the problem after that.
//
problem = t;
t.printStackTrace();
}
doAfterProcessing(request, response);
//
// If there was a problem, we want to rethrow it if it is
// a known type, otherwise log it.
//
if (problem != null) {
if (problem instanceof ServletException) throw (ServletException)problem;
if (problem instanceof IOException) throw (IOException)problem;
sendProcessingError(problem, response);
}
}
------解决方案--------------------
LogInlet.java (调用代码)
片段：
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType( "text/html;charset=UTF-8 ");
request.setCharacterEncoding( "UTF-8 ");