排除子目录的筛选器映射url模式

这个 url-pattern 在搭配上确实有限制。它只允许精确、前缀或后缀匹配。不是中间/整体/正则表达式匹配。例如。 /*.xhtml 你想做的事行不通。

如果要在 /test Filter 收听广播 访问路径 *.xhtml doFilter()

// First cast ServletRequest to HttpServletRequest.
HttpServletRequest hsr = (HttpServletRequest) request;

// Check if requested resource is not in /test folder.
if (!hsr.getServletPath().startsWith("/test/")) {
    // Not in /test folder. Do your thing here.
}

这个 HttpServletRequest#getServletPath()

如果需要,可以配置值 /试验 作为一个 <init-param> web.xml 而不是在过滤器的代码中。

解决方案,基本上您需要自己的Filter类,并将排除url定义为Filter的init param

package test;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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;

public class LoginValidationFilter implements Filter {

    private String loginPage = "";
    private List<String> excludedURLs;

    public void init(FilterConfig filterConfig) throws ServletException {
        this.loginPage = filterConfig.getInitParameter("loginPage");

        String[] excluded = filterConfig.getInitParameter("excludedURLs").split(";");
        excludedURLs = new ArrayList<String>();
        for (int i = 0; i < excluded.length; i++) {
            excludedURLs.add(excluded[i]);
        }
    }

    public void destroy() {
        this.loginPage = "";
    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException,
            ServletException {

        HttpServletRequest httpRequest = request instanceof HttpServletRequest ? (HttpServletRequest) request : null;
        HttpServletResponse httpResponse = response instanceof HttpServletResponse ? (HttpServletResponse) response
                : null;

        if (httpRequest == null || httpResponse == null) {
            filterChain.doFilter(request, response);
            return;
        }

        boolean isExcludedURL = false;
        for (int i = 0; i < excludedURLs.size(); i++) {
            if (httpRequest.getRequestURL().indexOf(excludedURLs.get(i)) > -1) {
                isExcludedURL = true;
                break;
            }
        }

        if (isExcludedURL) {
            filterChain.doFilter(request, response);
        } else {
            if (UserUtil.validateUserLogin(httpRequest)) {
                filterChain.doFilter(request, response);
            } else {
                httpResponse.sendRedirect(httpRequest.getContextPath() + loginPage);
            }
        }
    }
}

并在web.xml中定义过滤器、映射和排除URL

<filter>
    <filter-name>LoginValidationFilter</filter-name>
    <filter-class>test.LoginValidationFilter</filter-class>
    <init-param>
        <param-name>loginPage</param-name>
        <param-value>/login.jsp</param-value>
    </init-param>
    <init-param>
        <param-name>excludedURLs</param-name>
        <param-value>/admin/;/assets/;/content/;/css/;/js/;/login.jsp;/login.cmd;/logout.cmd;forgot_password.jsp;pageName=</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>LoginValidationFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

使用标准servlet/filters可用的方法,没有直接的方法排除子目录,因为 *.ext /test/*.xhtml 映射并相应地处理。

您可以为上下文根目录中的每个文件添加一个url映射值,因此筛选器将应用于这些文件,而不会应用于测试文件夹中的文件(实际上它只应用于那些特定的文件)。下面这些对我有用

<url-pattern>/index.faces</url-pattern>

url-regexp reference ). 看看你的容器里有没有这样的东西。