Question

我必须运行java URL =＆＃34; http：// localhost：8080 / RESTfulExample / rest / json / metallica / get＆＃34;在Apache Tomcat上，但我得到404错误。我想得到json的回应所以我在做什么？

@Path("/json/metallica")
public class JSONService {

    @GET
    @Path("/get")
    @Produces(MediaType.APPLICATION_JSON)
    public Track getTrackInJSON() {

        Track track = new Track();
        track.setTitle("Enter Sandman");
        track.setSinger("Metallica");

        return track;

    }

public class NetClientGet {


    public static void main(String[] args) {

        try {

            URL url = new URL(
                    "http://localhost:8080/RESTfulExample/rest/json/metallica/get");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setRequestProperty("Accept", "application/json");



            BufferedReader br = new BufferedReader(new InputStreamReader(
                    (conn.getInputStream())));

            String output;
            System.out.println("Output from Server .... \n");
            while ((output = br.readLine()) != null) {

                System.out.println(output);
            }

            conn.disconnect();

        } catch (MalformedURLException e) {

            e.printStackTrace();
        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

例外：

java.lang.RuntimeException：失败：HTTP错误代码：404 at com.mkyong.client.JerseyClientPost.main（JerseyClientPost.java:24）

Web.xml：

<web-app id="WebApp_ID" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>Restful Web Application</display-name>

    <servlet>
        <servlet-name>jersey-serlvet</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.mkyong.rest</param-value>
        </init-param>
        <init-param>
            <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
            <param-value>true</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

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

</web-app>

Answer 1

当路径应为http://localhost:8080/RESTfulExample/rest/json/product/get;

时，您正在查询http://localhost:8080/RESTfulExample/rest/json/metallica/get

Answer 2

您的问题未显示使用/RESTfulExample/rest作为基本路径的指示因此，假设应用程序的名称为RESTfulExample，您似乎正在为此路径服务：
/RESTfulExample/json/metallica/get

此外，您的代码中的两个**应该有编译错误：
**track.setTitle("Enter Sandman");

在apache localhost中运行应用程序：8080

2 个答案: