java - Jersey 服务器缺少依赖项

Question

我正在使用此代码:

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.sun.jersey.core.header.FormDataContentDisposition;
import com.sun.jersey.multipart.FormDataParam;

@Path("/files")
public class JerseyFileUpload {

    private static final String SERVER_UPLOAD_LOCATION_FOLDER = "C://Users/nikos/Desktop/Upload_Files/";

    /**
     * Upload a File
     */

    @POST
    @Path("/upload")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public Response uploadFile(
            @FormDataParam("file") InputStream fileInputStream,
            @FormDataParam("file") FormDataContentDisposition contentDispositionHeader) {

        String filePath = SERVER_UPLOAD_LOCATION_FOLDER
                + contentDispositionHeader.getFileName();

        // save the file to the server
        saveFile(fileInputStream, filePath);

        String output = "File saved to server location : " + filePath;

        return Response.status(200).entity(output).build();

    }

    // save uploaded file to a defined location on the server
    private void saveFile(InputStream uploadedInputStream, String serverLocation) {

        try {
            OutputStream outpuStream = new FileOutputStream(new File(
                    serverLocation));
            int read = 0;
            byte[] bytes = new byte[1024];

            outpuStream = new FileOutputStream(new File(serverLocation));
            while ((read = uploadedInputStream.read(bytes)) != -1) {
                outpuStream.write(bytes, 0, read);
            }
            outpuStream.flush();
            outpuStream.close();
        } catch (IOException e) {

            e.printStackTrace();
        }

    }

}

当我尝试在 Apache Tomcat 上运行它时，我收到以下错误消息:

SEVERE: The following errors and warnings have been detected with resource and/or provider classes:
  SEVERE: Missing dependency for method public javax.ws.rs.core.Response com.javacodegeeks.enterprise.rest.jersey.JerseyFileUpload.uploadFile(java.io.InputStream,com.sun.jersey.core.header.FormDataContentDisposition) at parameter at index 0
  SEVERE: Missing dependency for method public javax.ws.rs.core.Response com.javacodegeeks.enterprise.rest.jersey.JerseyFileUpload.uploadFile(java.io.InputStream,com.sun.jersey.core.header.FormDataContentDisposition) at parameter at index 1
  SEVERE: Method, public javax.ws.rs.core.Response com.javacodegeeks.enterprise.rest.jersey.JerseyFileUpload.uploadFile(java.io.InputStream,com.sun.jersey.core.header.FormDataContentDisposition), annotated with POST of resource, class com.javacodegeeks.enterprise.rest.jersey.JerseyFileUpload, is not recognized as valid resource method.
Nov 19, 2014 11:44:41 AM org.apache.catalina.core.ApplicationContext log
SEVERE: StandardWrapper.Throwable
com.sun.jersey.spi.inject.Errors$ErrorMessagesException
    at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
    at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
    at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790)
    at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:491)
    at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:321)
    at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605)
    at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:376)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:559)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1241)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1154)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1041)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4932)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5218)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

Nov 19, 2014 11:44:41 AM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /asdf threw load() exception
com.sun.jersey.spi.inject.Errors$ErrorMessagesException
    at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
    at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
    at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790)
    at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:491)
    at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:321)
    at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605)
    at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:376)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:559)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1241)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1154)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1041)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4932)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5218)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:74

这是什么意思？如何修复这些依赖关系？

提前致谢!

UPD 0依赖关系:

<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.javacodegeeks.enterprise.rest.jersey</groupId>
    <artifactId>JAXRS-HelloWorld</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <repositories>
        <repository>
            <id>maven2-repository.java.net</id>
            <name>Java.net Repository for Maven</name>
            <url>http://download.java.net/maven/2/</url>
            <layout>default</layout>
        </repository>
    </repositories>

    <dependencies>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.9</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey.contribs</groupId>
            <artifactId>jersey-multipart</artifactId>
            <version>1.9</version>
        </dependency>

    </dependencies>

</project>

Answer 1

当您部署 Tomcat 时，这些 jar 很可能不会被传输到 Tomcat。我认为存在问题的一件事是，您缺少 <packaging>在你的pom.xml 。如果缺少此选项，则默认将构建 .jar 。您需要的是 .war其中依赖项被放入 WEB-INF/lib .

所以添加<packaging>war</packaging>就在您的项目下 <version> 。清理并打包项目。那么你应该得到一个.war文件。如果你爆炸.war ，您应该看到 WEB-INF/lib 。这是 webapp 依赖项的标准位置。无需爆炸，只需将 war 添加到Tomcat webapp即可dir，当您启动 Tomcat 时，它应该会爆炸 .war并且应该能够在那里找到库。

添加此内容后，我运行您的示例没有问题。