Jetty Server

Question

大家好。

我使用Jersey 2开发了一个使用RESTful API在Jetty上运行的Web服务。我后来不得不创建一个文件上传方法（主要用于XLS / XML文件），我尝试使用Jersey 2的Multipart库。

但是，当服务器启动时，它会立即抛出一个奇怪的异常：

2016-09-21 01:13:13.578:INFO:oejs.AbstractConnector:main: Started ServerConnector@17f62e33{HTTP/1.1,[http/1.1]}{0.0.0.0:8080}
Exception in thread "main" java.lang.NoClassDefFoundError: org/glassfish/jersey/internal/inject/ExtractorException
at org.glassfish.jersey.media.multipart.internal.FormDataParamValueFactoryProvider.createValueFactory(FormDataParamValueFactoryProvider.java:436)

[.............................................]

Jetty Server

public static void main(String[] args) {

    final ResourceConfig resourceConfig = new ResourceConfig(API.class);
    resourceConfig.packages("the_package_where_these_classes_are");
    resourceConfig.register(MultiPartFeature.class);

    ServletHolder jerseyServlet
            = new ServletHolder(new ServletContainer(resourceConfig));

    Server jettyServer = new Server(8080);
    ServletContextHandler context = new ServletContextHandler(jettyServer, "/");
    context.addServlet(jerseyServlet, "/*");

    try {
        jettyServer.start();
        jettyServer.join();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        //jettyServer.destroy(); 
        // got an IllegalStateException uncommenting this and didn't quite understand why
     }
}

端点/针织/ JAX-RS

import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataParam;

import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.io.InputStream;


@Path("/")
public class API {

@POST
@Path("test")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFile(@FormDataParam("file") InputStream uploadedInputStream,
                           @FormDataParam("file") FormDataContentDisposition fileDetails) throws Exception {


    System.out.println(fileDetails.getFileName());
    return Response.ok().build();
}
}

应用程序配置

import org.glassfish.jersey.media.multipart.MultiPartFeature;

import javax.ws.rs.core.Application;
import java.util.Set;

public class ApplicationConfig extends Application {

@Override
public Set<Class<?>> getClasses() {
    Set<Class<?>> resources = new java.util.HashSet<>();
    resources.add(MultiPartFeature.class);
    resources.add(API.class);

    return resources;
}
}

Maven依赖

<dependencies>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-servlet</artifactId>
        <version>9.3.11.v20160721</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet-core</artifactId>
        <version>2.7</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.glassfish.jersey.media/jersey-media-multipart -->
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-multipart</artifactId>
        <version>2.23.2</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-multipart</artifactId>
        <version>2.23.2</version>
    </dependency>

</dependencies>

我使用了一些错误的依赖吗？这个简单的服务不应该起作用吗？我之前从未使用过Multipart，所以我尝试了几个互联网资源/教程。

提前致谢！

固定

我在所有Jersey依赖项中将版本更改为最新版本并且它有效！

Answer 1

jersey-media-multipart取决于jersey-common，添加

    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-common</artifactId>
        <version>2.23.2</version>
    </dependency>

Answer 2

对我来说，工作如下：

        final ResourceConfig resourceConfig = new ResourceConfig(ApplicationConfig.class);
        resourceConfig.packages("com.econorma.rest");
        resourceConfig.register(MultiPartFeature.class);

        ServletHolder jerseyServlet  = new ServletHolder(new ServletContainer(resourceConfig));

这是ApplicationConfig类

@ApplicationPath("/")
public class ApplicationConfig extends Application {

    @Override
    public Set<Class<?>> getClasses() {
        final Set<Class<?>> resources = new HashSet<Class<?>>();
        resources.add(MultiPartFeature.class);
        resources.add(EntryPoint.class);
        return resources;
    }

    @Override
    public Map<String, Object> getProperties() {
        Map<String, Object> properties = new HashMap<String, Object>();
        properties.put("jersey.config.server.provider.packages", "com.econorma.rest");
        return properties;
    }
}

Answer 3

Jersey提供了相应版本的示例。您可以在项目中添加以下依赖项，并使用IDE的下载源代码功能可以下载此示例的源代码。通过单击pom父级，您还可以看到相同球衣版本的所有示例。它有帮助！

    <dependency>
        <groupId>org.glassfish.jersey.examples</groupId>
        <artifactId>multipart-webapp</artifactId>
        <version>${jersey.version}</version>
    </dependency>

使用Jersey 2和Jetty

Jetty Server

端点/针织/ JAX-RS

应用程序配置

Maven依赖

3 个答案: