Java / Jetty：如何向嵌入式Jetty添加filter

我正在使用嵌入式Jetty，我想添加一个servletfilter来检查每个请求之前的身份validation。 我尝试了这个例子，但看起来签名已经改变了。

 org.eclipse.jetty jetty-server 9.0.4.v20130625  

我的Jetty起动器看起来像这样：

 public class JettyStarter { public static void main( final String[] args ) throws Exception { Server server = new Server(8080); final ServletHolder servletHolder = new ServletHolder(new CXFServlet()); final ServletContextHandler context = new ServletContextHandler(); context.setContextPath("/"); // context.addFilter(AuthenticationFilter.class, "/*", FilterMapping.REQUEST); context.addServlet(servletHolder, "/platform/*"); context.addEventListener(new ContextLoaderListener()); context.setInitParameter("contextClass", AnnotationConfigWebApplicationContext.class.getName()); context.setInitParameter("contextConfigLocation", Config.class.getName()); server.setHandler(context); server.start(); server.join(); } } 

当我取消注释该行

 // context.addFilter(AuthenticationFilter.class, "/*", FilterMapping.REQUEST); 

我发现签名已经改变了。 所以我想稍微退后一步，用嵌入式Jetty询问如何添加在请求开始时运行的filter，并且只有在满足某些条件时才允许请求继续？

AuthenticationFilter类的开头如下所示：

 import javax.servlet.*; import java.io.IOException; public class AuthenticationFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException {} @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {} @Override public void destroy() {} } 

Answer 1

您可能正在寻找EnumSet.of(DispatcherType.REQUEST) ，包括以下完整示例：

 import java.io.IOException; import java.util.EnumSet; import javax.servlet.DispatcherType; 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.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.eclipse.jetty.server.Server; import org.eclipse.jetty.servlet.ServletHandler; public class JettyFilter { public static void main(final String[] args) throws Exception { Server server = new Server(8080); ServletHandler handler = new ServletHandler(); server.setHandler(handler); handler.addServletWithMapping(HelloServlet.class, "/*"); handler.addFilterWithMapping(HelloPrintingFilter.class, "/*", EnumSet.of(DispatcherType.REQUEST)); server.start(); server.join(); } public static class HelloServlet extends HttpServlet { private static final long serialVersionUID = 1L; @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); response.setStatus(HttpServletResponse.SC_OK); response.getWriter().println("
Hello SimpleServlet
"); } } public static class HelloPrintingFilter implements Filter { @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { System.out.print("hello from filter"); } @Override public void init(FilterConfig arg0) throws ServletException { } @Override public void destroy() {} } }