java - 使用 Jersey 2 和 Jetty 上传文件

Question

• 大家好。

我使用 Jersey 2 开发了一个通过 RESTful API 在 Jetty 上运行的 Web 服务。 后来我不得不创建一个文件上传方法(主要针对 XLS/XML 文件)，并尝试使用 Jersey 2 的 Multipart 库。

但是，当服务器启动时，它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 服务器

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/ Jersey /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 依赖项

<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>

我是否使用了错误的依赖项？这个简单的服务不应该起作用吗？我以前从未使用过 Multipart，因此我尝试引用几个互联网资源/教程。

提前致谢!

已修复

我将所有 Jersey 依赖项的版本更改为最新版本，并且成功了!

Answer 1

jersey-media-multipart 依赖于 jersey-common ，添加

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