Maven - Restful Web 服务 - Jersey - 编译错误 - 包 javax.ws.rs 不存在

Question

互联网线程中仍然没有针对此问题的正确解决方案。 我在 Eclipse 中有一个针对 Jersey RESTFul Web 服务的 Maven 项目。因此，将以下库（21 个）所需的球衣复制到项目 --> WEB-INF --> lib 文件夹和项目构建路径中。

aopalliance-repackaged-2.4.0-b34.jar
 asm-debug-all-5.0.4.jar
 hk2-api-2.4.0-b34.jar 
 hk2-locator-2.4.0-b34.jar
 hk2-utils-2.4.0-b34.jar 
 javassist-3.18.1-GA.jar
 javax.annotation-api-1.2.jar
 javax.inject-2.4.0-b34.jar
 javax.servlet-api-3.0.1.jar 
 javax.ws.rs-api-2.0.1.jar
 jaxb-api-2.2.7.jar jersey-client.jar
 jersey-common.jar
 jersey-container-servlet.jar 
 jersey-container-servlet-core.jar
 jersey-guava-2.23.1.jar 
 jersey-media-jaxb.jar jersey-server.jar
 org.osgi.core-4.2.0.jar 
 osgi-resource-locator-1.0.1.jar
 persistence-api-1.0.jar 
 validation-api-1.1.0.Final.jar

当我将此项目导出为 WAR 文件并部署在 Tomcat 中时，可以访问该服务。但实际要求是在同一个 WAR 文件不起作用的 WebLogic 服务器中运行此服务。所以，我必须使用 maven 来创建 WAR 文件，而不仅仅是导出为 WAR 文件。

以下是我做的步骤。

在Eclipse中-->项目-->右键-->作为Maven构建运行-->全新安装-->运行

它仍然抛出下面的编译错误。

[错误] 编译错误： [信息] ------------------------------------------------------------ -------------- [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[6,19] 包 javax.ws.rs 不存在 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[7,19] 包 javax.ws.rs 不存在 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[8,19] 包 javax.ws.rs 不存在 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[9,24] 包 javax.ws.rs.core 不存在 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[10,24] 包 javax.ws.rs.core 不存在 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[11,33] 包 javax.ws.rs.core.Response 不存在 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[23,2] 找不到符号 符号：类路径 [错误] /Users/karthik/Documents/workspace/Apple_DownloadFileWS/src/com/apple/downloadws/DownloadService.java:[31,12] 找不到符号 符号：类响应

这是我的 pom.xml：

<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>Apple_DownloadFileWS</groupId>
    <artifactId>Apple_DownloadFileWS</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>Apple_DownloadFileWS</name>
    <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <warSourceDirectory>WebContent</warSourceDirectory>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey.core</groupId>
                <artifactId>jersey-client</artifactId>
                <version>2.23.1</version>
                <scope>provided</scope>
            </dependency>
            <dependency>
                <groupId>org.glassfish.jersey.core</groupId>
                <artifactId>jersey-common</artifactId>
                <version>2.11</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.glassfish.jersey.containers/jersey-container-servlet-core -->
            <dependency>
                <groupId>org.glassfish.jersey.containers</groupId>
                <artifactId>jersey-container-servlet-core</artifactId>
                <version>2.23</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.glassfish.jersey.containers/jersey-container-servlet -->
            <dependency>
                <groupId>org.glassfish.jersey.containers</groupId>
                <artifactId>jersey-container-servlet</artifactId>
                <version>2.23</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.glassfish.jersey.bundles.repackaged/jersey-guava -->
            <dependency>
                <groupId>org.glassfish.jersey.bundles.repackaged</groupId>
                <artifactId>jersey-guava</artifactId>
                <version>2.23.1</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.glassfish.jersey.media/jersey-media-jaxb -->
            <dependency>
                <groupId>org.glassfish.jersey.media</groupId>
                <artifactId>jersey-media-jaxb</artifactId>
                <version>2.23</version>
            </dependency>

            <!-- https://mvnrepository.com/artifact/org.glassfish.jersey.media/jersey-media-json-jackson -->
            <dependency>
                <groupId>org.glassfish.jersey.media</groupId>
                <artifactId>jersey-media-json-jackson</artifactId>
                <version>2.23</version>
            </dependency>

            <dependency>
                <groupId>javax.ws.rs</groupId>
                <artifactId>javax.ws.rs-api</artifactId>
                <version>2.0.1</version>
                <scope>provided</scope>
            </dependency>
            <dependency>
                <groupId>com.sun.jersey</groupId>
                <artifactId>jersey-server</artifactId>
            </dependency>

            <dependency>
                <groupId>javax</groupId>
                <artifactId>javaee-web-api</artifactId>
                <version>6.0</version>
                <scope>provided</scope>
            </dependency>


            <dependency>
    <groupId>javax.ws.rs</groupId>
    <artifactId>jsr311-api</artifactId>
    <version>1.1.1</version>
</dependency>
        </dependencies>
    </dependencyManagement>

</project>

Web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Apple_DownloadFileWS</display-name>
  <servlet>
    <servlet-name>Jersey REST Service</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.apple.downloadws</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>/rest/*</url-pattern>
  </servlet-mapping>
</web-app>

服务类：

package com.apple.downloadws;

import java.io.File;
import java.util.logging.Logger;

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

// Plain old Java Object it does not extend as class or implements 
// an interface

// The class registers its methods for the HTTP GET request using the @GET annotation. 
// Using the @Produces annotation, it defines that it can deliver several MIME types,
// text, XML and HTML. 

// The browser requests per default the HTML MIME type.

//Sets the path to base URL + /hello
@Path("/downloadservice")
public class DownloadService {

  // This method is called to send the output txt file to download...
    private static final String FILE_PATH = "/ngs/app/alect/test";  
    @GET   
    @Path("/txt")  
    @Produces("text/plain")    
    public Response getTextFile() {  
        File file = new File(FILE_PATH);  
        Logger.getLogger("!!!!!!!!!!!");
        System.out.println("!!!!!!!!!!");
        ResponseBuilder response = Response.ok((Object) file);  
        response.header("Content-Disposition","attachment; filename=\"sample.txt\"");  
        return response.build();  

    }  

    // This method is called if TEXT_PLAIN is request
  @GET
  @Produces(MediaType.TEXT_PLAIN)
  public String sayPlainTextHello() {
    return "Hello Jersey";
  }

  // This method is called if XML is request
  @GET
  @Produces(MediaType.TEXT_XML)
  public String sayXMLHello() {
    return "<?xml version=\"1.0\"?>" + "<hello> Hello Jersey" + "</hello>";
  }

  // This method is called if HTML is request
  @GET
  @Produces(MediaType.TEXT_HTML)
  public String sayHtmlHello() {
    return "<html> " + "<title>" + "Hello Jersey" + "</title>"
        + "<body><h1>" + "Hello Jersey" + "</body></h1>" + "</html> ";
  }

} 

我可以知道 maven pom.xml 依赖项应该包含哪些内容吗？我用谷歌搜索并添加了上述依赖项，但仍然出现相同的错误。我在这里缺少任何依赖项吗？

Answer 1

您已在 pom.xml 的 dependencyManagement 部分而不是 dependencies 部分中列出了所有依赖项。 dependencyManagement 用于管理依赖的版本和范围，对于临时依赖或确保跨多模块项目的一致性特别有用，但它实际上并没有将依赖放在类路径上。要将依赖项添加到类路径中，您需要在 dependencies 部分中列出它们。您的 pom.xml 目前的方式，您的构建完全没有依赖关系。