java - Tomcat 7 Jersey REST 不工作

Question

我遵循了无数示例和教程，试图让我的 REST Web 服务运行，但没有任何成功。我正在使用 IntelliJ 13、Maven3、Java 7 和 Tomcat 7。

我的 pom.xml 看起来像这样:

<?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.jafwatt</groupId>
    <artifactId>rest-service</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.2</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-deploy-plugin</artifactId>
                <version>2.7</version>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>javax.ws.rs</groupId>
            <artifactId>javax.ws.rs-api</artifactId>
            <version>2.0-m10</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-servlet</artifactId>
            <version>1.18</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
</project>

我的 web.xml 如下所示:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <display-name>rest</display-name>
    <servlet>
        <servlet-name>restServlet</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.jafwatt.rest</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>restServlet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

客户资源.java

package com.jafwatt.rest;

import com.jafwatt.rest.entity.Customer;

import javax.ws.rs.*;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.StreamingOutput;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;

@Path("/customers")
public class CustomerResource {

    private Map<Integer, Customer> customerDB = new ConcurrentHashMap<Integer, Customer>();
    private AtomicInteger idCounter = new AtomicInteger();

    @GET
    @Path("/hello")
    @Produces("text/plain")
    public String getCustomers() {
        return "Hello";
    }

    @POST
    @Consumes("application/xml")
    public Response createCustomer(InputStream is) {
        Customer customer = readCustomer(is);
        customer.setId(idCounter.incrementAndGet());
        customerDB.put(customer.getId(), customer);
        System.out.println("Created customer " + customer.getId());
        return Response.created(URI.create("/customers/"
                + customer.getId())).build();
    }

    @GET
    @Path("{id}")
    @Produces("application/xml")
    public StreamingOutput getCustomer(@PathParam("id") int id) {
        final Customer customer = customerDB.get(id);
        if (customer == null) {
            throw new WebApplicationException(
                    Response.Status.NOT_FOUND);
        }
        return new StreamingOutput() {
            public void write(OutputStream outputStream)
                    throws IOException, WebApplicationException {
                outputCustomer(outputStream, customer);
            }

            private void outputCustomer(OutputStream outputStream, Customer customer) {

            }
        };
    }

    @PUT
    @Path("{id}")
    @Consumes("application/xml")
    public void updateCustomer(@PathParam("id") int id,
                               InputStream is) {
        Customer update = readCustomer(is);
        Customer current = customerDB.get(id);
        if (current == null)
            throw new WebApplicationException(Response.Status.NOT_FOUND);
        current.setFirstName(update.getFirstName());
        current.setLastName(update.getLastName());
        current.setStreet(update.getStreet());
        current.setState(update.getState());
        current.setZip(update.getZip());
        current.setCountry(update.getCountry());
    }

    private Customer readCustomer(InputStream is) {
        return new Customer();
    }
}

Maven 构建 WAR 时没有错误，Tomcat 部署 WAR 时没有错误，但是除了 404 响应之外，URL 组合没有得到任何其他内容。

根上下文是“rest”和我尝试过的 URL:

http://localhost:8090/rest
http://localhost:8090/rest/custsomers
http://localhost:8090/rest/custsomers/hello

我知道 Tomcat 正在该端口上运行，因为我可以访问管理器应用程序。

我在 Stackoverflow 和其他地方阅读了很多帖子，我真的很沮丧，因为我无法完成本应是一项相对简单的任务。

请帮忙。

Answer 1

问题是我的依赖项。

这就是我的网络服务正在运行时的样子:

<dependencies>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-core</artifactId>
        <version>1.18.1</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-server</artifactId>
        <version>1.18.1</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-servlet</artifactId>
        <version>1.18.1</version>
        <scope>compile</scope>
    </dependency>
</dependencies>