Jetty + Jersey + Jackson，Eclipse（成功）与命令行的不同行为（错误不支持的媒体类型）！ [英] Jetty + Jersey + Jackson, different behavior in Eclipse (Success) vs command line (Error Unsupported Media Type)!

问题描述

我疯狂地试图在Eclipse之外运行Jetty Jersey和Jackson。

I'm getting crazy trying to run Jetty Jersey and Jackson outside Eclipse.

我有一个主要类：

public class Main {

    public static void main(String[] args) throws Exception {

        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
        context.addServlet(org.glassfish.jersey.servlet.ServletContainer.class, "/*").setInitParameter(
            "jersey.config.server.provider.classnames", CanaryEndpoint.class.getCanonicalName());

        Server jettyServer = new org.eclipse.jetty.server.Server(8089);
        jettyServer.setHandler(context);
        jettyServer.start();
        jettyServer.join();
    }
}

端点类：

@Path("/endpoint")
public class CanaryEndpoint {

    @POST
    @Path("/test")
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public String canaryTest(ValueWrapper param) {
        System.out.println("Deserialized Property: " + param.isFlag());
        return "{OK}";
    }
}

和实体（反序列化）类：

and an Entity (to unserialize) class:

@XmlRootElement
@XmlAccessorType(XmlAccessType.NONE)
public class ValueWrapper {
    @XmlElement
    public boolean flag;

    public ValueWrapper() {}
    public boolean isFlag()           { return flag; }
    public void setFlag(boolean flag) { this.flag = flag;}
}

现在它来了有趣的部分。
我使用Postman通过向8089端口发送POST请求和原始JSON值 {flag：true} 来测试JSON消费内容类型和接受充分设置。

Now it comes the funny part. I use Postman to test the JSON consuming by sending a POST petition to 8089 port and a raw JSON value of {"flag" : "true"} with both Content-type and Accept adequately set.

当我通过eclipse服务器正确播放Main类时，但是当我在CLI中执行它时（mvn clean package + java -cpJar） main_class），服务器答案错误415：Unsuported媒体类型

When I play Main class through eclipse server answers correctly, but when I do it in the CLI (mvn clean package + java -cpJar main_class), server answers Error 415: Unsuported Media Type

我的简单pom.xml：

My simple pom.xml:

<jersey.version>2.14</jersey.version>
<jetty-version>9.2.6.v20141205</jetty-version>
(...)
<artifactId>jetty-server</artifactId>
<artifactId>jetty-servlet</artifactId>
<artifactId>jersey-container-servlet-core</artifactId>
<artifactId>jersey-json</artifactId>
<artifactId>jersey-media-json-jackson</artifactId>

有关正在发生的事情的任何建议吗？

Any suggestion regarding what is happening?

编辑：
我缩小了一点问题。看起来像com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider在从控制台执行应用程序时没有注册。如何手动注册呢？

推荐答案

我在uber jar中执行泽西休息服务时遇到了同样的问题。我能够使用以下文章解决这个问题。希望这可能有助于某人。泽西+杰克逊的JSON示例

I had the same problem when executing jersey rest services in uber jar.I was able to fix this using following article.Hope this might help someone.JSON example with Jersey + Jackson

上面的例子是用球衣1.x.Here编写的，是球衣2.x实施。

Above example was written in jersey 1.x.Here is the jersey 2.x implementation.

将以下jersey jackson依赖项添加到您的pom

Add following jersey jackson dependency to your pom

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
     <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.21</version>
</dependency>

并在 init-param 中添加 web.xml

<init-param>
<param-name>jersey.config.server.provider.classnames</param-name>
<param-value>org.glassfish.jersey.jackson.JacksonFeature</param-value>
</init-param>

或者您可以明确注册杰克逊功能，如@peeskillet所述。

or you can explicitly register the jackson feature like @peeskillet mentioned.

ResourceConfig config = new ResourceConfig();
config.register(JacksonFeature.class);

这篇关于Jetty + Jersey + Jackson，Eclipse（成功）与命令行的不同行为（错误不支持的媒体类型）！的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！