java - RESTful Jersey 请求的资源不可用

Question

我正在开发一个 REST Web 服务，它应该能够根据 URL 参数使用 XML 进行响应。我有这个应用程序的第一个版本作为本地版本，因此我有一个 POJO 主类来初始化 XML 处理。问题是无法定位资源，也许我犯了一个错误，将 POJO main 方法放在 Application 类中。此 URI 可以正常工作 localhost:8090/org.CTAG.DATEX2REST，但如果您添加位置 URL 路径，它就不起作用。

PD:我正在使用 jersey 框架、maven、JAXB 和 Tomcat8

编辑:我已经删除了应用程序类，POJO main 现在是一个 ServletContextListener

休息课:

package com.CTAG.rest;

import java.util.LinkedList;
import java.util.List;
import java.util.Objects;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import com.CTAG.core.Traslator;
import eu.datex2.schema._2_0._2_3.D2LogicalModel;
import eu.datex2.schema._2_0._2_3.Situation;
import eu.datex2.schema._2_0._2_3.SituationPublication;
import com.CTAG.filters.FilterByRoad;
@Path("/datex")
@Produces(MediaType.APPLICATION_XML)
public class DataExchange {

    private D2LogicalModel datex2 = Traslator.d2;

    @GET
    @Produces(MediaType.APPLICATION_XML)
    public Response getDatex() {

        return Response.ok(this.datex2).build();

    }

    @GET
    @Path("/{road}")
    public Response getDatexByRoad(@PathParam("road") String roadName){

        SituationPublication payLoad = (SituationPublication)this.datex2.getPayloadPublication();
        FilterByRoad filter = new FilterByRoad(payLoad.getSituation());
        List<Situation> filteredList = new LinkedList<>();
        filteredList.addAll(filter.filterByRoad(roadName));
        payLoad.setSituation(filteredList);
        this.datex2.setPayloadPublication(payLoad);

        return Response.ok(this.datex2).build();
    }
}

应用程序类:

package com.CTAG.application;

import eu.datex2.schema._2_0._2_3.D2LogicalModel;
import eu.datex2.schema._2_0._2_3.SituationRecord;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import javax.xml.bind.JAXBException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerConfigurationException;

import com.CTAG.core.Traslator;

import static java.lang.Thread.sleep;

import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;

/**
 * Configuration of the REST application. This class includes the resources and
 * configuration parameter used in the REST API of the application.
 *
 * @author Andoni Da Silva
 *
 */

@ApplicationPath("/rest")
public class ExchangeApplication extends Application{
    @Override
    public Set<Class<?>> getClasses() {
        return Stream.of(D2LogicalModel.class)
                .collect(Collectors.toSet());
    }

    //Old POJO main method
    public static void init() throws InterruptedException {

        try {
            Map<SituationRecord, Integer> map = new HashMap<> ();
            while (true) {

                URL url = new URL (" http://infocar.dgt.es/datex2/dgt/SituationPublication/all/content.xml");
                Map<SituationRecord, Integer> copia = map;
                map = Traslator.traslator (copia, url);
                sleep (120000);
                //Preubassleep(30000);
            }
        } catch (TransformerConfigurationException | JAXBException | ParserConfigurationException | IOException e) {

            e.printStackTrace ();

        }
    }
}

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">

    <display-name>CTAG DATEX2</display-name>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>

    <servlet>
        <servlet-name>org.CTAG.DATEX2REST</servlet-name>
        <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>jersey</servlet-name>
        <url-pattern>/rest*</url-pattern>
    </servlet-mapping>

</web-app>

Answer 1

看来您的 servlet 映射是错误的，应该如下所示，您需要告诉 servlet 从哪里选择带注释的类

<servlet>
        <servlet-name>jersey</servlet-name>
        <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
         <init-param>
         <param-name>com.sun.jersey.config.property.packages</param-name>
         <param-value>com.CTAG.rest</param-value>
    </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>jersey</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>