如何修复JavaRESTAPI？保持404'；s

我按照本教程（）使用tomcat在java中创建了一个简单的RESTAPI，但我一直遇到404错误，我看不出哪里出了问题

我猜错误在我的配置中的某些地方

web.xml

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

    <servlet>
        <servlet-name>Jersey Web Application</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>com.demo</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey Web Application</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
</web-app>

我的项目结构

将资源添加到WEB-INF

Tomcat配置

404来自本地主机：8080/rest/myresource

---

因为MyResource.java驻留在演示包中。您需要更改web.xml中的包映射 （jersey.config.server.provider.packages的参数值）

更新的web.xml

Jersey Web应用程序
org.glassfish.jersey.servlet.ServletContainer
jersey.config.server.provider.packages
演示
1.
Jersey Web应用程序
/休息/*

应用程序的上下文根是什么？按上下文根指的是本地主机上下文吗？如果您查看tomcat配置图像，它应该是

http://localhost:8080/

和应用程序上下文

/

使用@Path（“/myresource”）而不是@Path（“myresource”）

@Path（/myresource”）

无法帮助@Nitikachange com.demo进行演示，因为myresource.java驻留在演示中

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.demo</groupId>
    <artifactId>SimpleJersey</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey</groupId>
                <artifactId>jersey-bom</artifactId>
                <version>${jersey.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
        </dependency>
    </dependencies>

    <properties>
        <jersey.version>2.23.2</jersey.version>
    </properties>

</project>

package demo;

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

/**
 * Created by marom on 27/09/16.
 */
@Path("myresource")
public class MyResource {

    /**
     * Method handling HTTP GET requests. The returned object will be sent
     * to the client as "text/plain" media type.
     *
     * @return String that will be returned as a text/plain response.
     */
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String getIt() {
        return "Got it!";
    }
}