设置web.xml中多个过滤器

我们在用struts2的时候，通常会使用默认的过滤器，定义拦截器，这样就可以控制请求过来的.action请求，但是如果我们直接使用.jsp来访问页面的话，就会有一些页面不能被拦截，会出现报错画面，影响网站的整体质量，这个时候我们就可以在web.xml中定义一个过滤器，让它来过滤.jsp的请求，做一些操作。代码如下：

<!-- 让Struts 2 的核心Filter拦截所有.action请求 -->
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>*.action</url-pattern>
	</filter-mapping>
	<!-- 自定义一个过滤器 -->
	<filter>
		<filter-name>myFilter</filter-name>
		<filter-class>jy.filter.MyFilter</filter-class>
	</filter>
	<!-- 让自定义的Filter拦截所有.jsp请求 -->
	<filter-mapping>
		<filter-name>myFilter</filter-name>
		<url-pattern>*.jsp</url-pattern>
	</filter-mapping>

 

过滤器java代码如下：

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class MyFilter implements Filter {

    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
	    FilterChain chain) throws IOException, ServletException {
	System.out.println("自定义过滤器开始！");
	HttpServletRequest request = (HttpServletRequest) req;
	HttpServletResponse response = (HttpServletResponse) res;
	HttpSession session = request.getSession();
	String uri = request.getRequestURI();
	uri = uri.split("/")[uri.split("/").length - 1];
	if (uri.equals("login.jsp") || uri.equals("regist.jsp")) {
	    chain.doFilter(req, res);
	} else {
	    if (session.getAttribute("user") != null) {
		chain.doFilter(req, res);
	    } else {
		response.sendRedirect(request.getContextPath() + "/login.jsp");
		return;
	    }
	}
    }

    public void init(FilterConfig arg0) throws ServletException {
    }

}