java - 尝试返回 XML 时 Jersey 返回 500

Question

我在使用 Jersey 2.29 时遇到问题。这是一个简单的例子。我设法返回纯文本，但如果我尝试返回 XML，则会收到 500 错误。

我的步骤:

启动服务器。前往http://localhost:8080/demorest/webapi/aliens 。我我会得到500。

当我重写此示例以返回纯文本时，一切正常。但对于 XML 来说是一个问题。

我看这里: Jersey returns 500 when trying to return an XML response但这对我不起作用。

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
     see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<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">
    <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.test.demorest</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey Web Application</servlet-name>
        <url-pattern>/webapi/*</url-pattern>
    </servlet-mapping>
</web-app>

外星人.java

package com.test.demorest;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Alien {

    private String name;
    private int points;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getPoints() {
        return points;
    }
    public void setPoints(int points) {
        this.points = points;
    }

}

AlienResource.java

package com.test.demorest;

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


@Path("aliens")
public class AlienResource {

    @GET
    @Produces(MediaType.APPLICATION_XML)
    public Alien getAlien() {
        System.out.println("getAlien called...");
        Alien a1 = new Alien();
        a1.setName("Adam");
        a1.setPoints(23);

        return a1;
    }

}

Answer 1

将其添加到 pom.xml 中的依赖项

   <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.3.0-b170201.1204</version>
    </dependency>

    <dependency>
        <groupId>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>1.1</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jaxb</groupId>
        <artifactId>jaxb-runtime</artifactId>
        <version>2.3.0-b170127.1453</version>
    </dependency>