我试图在我编写的、在 Grizzly 上运行的 Servlet 中获取一些注入(inject)的上下文(例如 Session 或 HttpServletRequest)，但我所做的一切似乎都不起作用。整个过程似乎因以下错误而过早停止:

SEVERE: Missing dependency for field: javax.servlet.http.HttpServletRequest com.test.server.LolCat.hsr

服务器非常简单，它由两个文件组成，静态入口点 (Main.java):

package com.test.server;

import java.io.IOException;
import java.net.URI;
import javax.ws.rs.core.UriBuilder;

import org.glassfish.grizzly.http.server.HttpServer;
import com.sun.jersey.api.container.grizzly2.GrizzlyServerFactory;
import com.sun.jersey.api.core.ClassNamesResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;

public class Main {

    private static URI getBaseURI() {
        return UriBuilder.fromUri("http://localhost/").port(8080).build();
    }

    public static final URI BASE_URI = getBaseURI();

    public static void main(String[] args) throws IOException {
        ResourceConfig rc = new ClassNamesResourceConfig(LolCat.class);
        HttpServer httpServer = GrizzlyServerFactory.createHttpServer(BASE_URI, rc);
        System.in.read();
        httpServer.stop();
    }
}

和 serlvet (LolCat.java):

package com.test.server;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;

@Path(value = "/lol")
public class LolCat {

    @Context HttpServletRequest hsr;

    @GET
    @Path(value="/cat")
    public String list() {
        return "meow";
    }

}

具体来说，上面源文件中的@Context 行是我所有问题的来源和解决方案。我需要它，根据我所读到的有关 Jersey 和 Servlet 的所有内容，它应该可以工作，但遗憾的是它没有。我也尝试过使用 GrizzlyWebContainerFactory 而不是 GrizzlyServerFactory，但无济于事。

作为引用，该项目是使用以下依赖项编译的:

• org.glassfish.grizzly:grizzly-framework:jar:2.2.21
• org.glassfish.grizzly:grizzly-http:jar:2.2.21
• org.glassfish.grizzly:grizzly-http-servlet:jar:2.2.21
• org.glassfish.grizzly:grizzly-http-server:jar:2.2.21
• com.sun.jersey:jersey-server:jar:1.17
• com.sun.jersey:jersey-servlet:jar:1.17
• com.sun.jersey:jersey-core:jar:1.17
• javax.servlet:javax.servlet-api:jar:2.5.0
• com.sun.jersey:jersey-grizzly2:jar:1.17
• com.sun.jersey:jersey-grizzly2-servlet:jar:1.17
• asm:asm:jar:3.3.1

最佳答案

这个主类对我来说很好用:

package com.test.server;

import com.sun.jersey.api.container.grizzly2.GrizzlyServerFactory;
import java.io.IOException;
import java.net.URI;
import javax.ws.rs.core.UriBuilder;

import com.sun.jersey.api.core.ClassNamesResourceConfig;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import org.glassfish.grizzly.http.server.HttpHandler;
import org.glassfish.grizzly.http.server.HttpServer;
import org.glassfish.grizzly.http.server.Request;
import org.glassfish.grizzly.http.server.Response;
import org.glassfish.grizzly.servlet.ServletRegistration;
import org.glassfish.grizzly.servlet.WebappContext;

public class Main {
    private static final String JERSEY_SERVLET_CONTEXT_PATH = "";

    private static URI getBaseURI() {
        return UriBuilder.fromUri("http://localhost").port(8080).path("/").build();
    }

    public static final URI BASE_URI = getBaseURI();

    public static void main(String[] args) throws IOException {
        // Create HttpServer and register dummy "not found" HttpHandler
        HttpServer httpServer = GrizzlyServerFactory.createHttpServer(BASE_URI, new HttpHandler() {

            @Override
            public void service(Request rqst, Response rspns) throws Exception {
                rspns.setStatus(404, "Not found");
                rspns.getWriter().write("404: not found");
            }
        });

        // Initialize and register Jersey Servlet
        WebappContext context = new WebappContext("WebappContext", JERSEY_SERVLET_CONTEXT_PATH);
        ServletRegistration registration = context.addServlet("ServletContainer", ServletContainer.class);
        registration.setInitParameter(ServletContainer.RESOURCE_CONFIG_CLASS, 
                ClassNamesResourceConfig.class.getName());
        registration.setInitParameter(ClassNamesResourceConfig.PROPERTY_CLASSNAMES, LolCat.class.getName());
        registration.addMapping("/*");
        context.deploy(httpServer);

        System.in.read();
        httpServer.stop();
    }
}

在浏览器中尝试 http://localhost:8080/lol/cat。 您可以更改 JERSEY_SERVLET_CONTEXT_PATH 以更新 Servlet 的上下文路径。

关于java - Grizzly 和 Servlet 容器上下文，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15769415/