在 Eclipse 中导入 Maven 项目时出错

Question

我有一个问题，我不知道如何解决。我想将一个maven项目导入eclipse。但是，当我这样做时，我从 eclipse 中收到以下错误：

但是当我在终端中执行“mvn install”时，我能够成功构建项目。 这是 pom.xml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<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.thinkaurelius.titan</groupId>
    <artifactId>titan-web-example</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <description>
        This is a simple web app example.
    </description>
    <licenses>
        <license>
            <name>The Apache Software License, Version 2.0</name>
            <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
        </license>
    </licenses>

    <properties>
        <spring.version>4.0.3.RELEASE</spring.version>
        <titan.version>1.0.0</titan.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>com.thinkaurelius.titan</groupId>
            <artifactId>titan-cassandra</artifactId>
            <version>${titan.version}</version>
            <exclusions>
                <!-- These don't play well w/ the web classesthatrunthings deps below -->
                <exclusion>
                    <groupId>org.mortbay.jetty</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.thinkaurelius.titan</groupId>
            <artifactId>titan-es</artifactId>
            <version>${titan.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.tinkerpop</groupId>
            <artifactId>gremlin-groovy</artifactId>
            <version>3.0.0-incubating</version>
        </dependency>


        <!-- Web App -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>jaxrs-api</artifactId>
            <version>2.2.1.GA</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.18.1</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.18.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- Jersey -->
        <dependency>
            <groupId>com.sun.jersey.contribs</groupId>
            <artifactId>jersey-spring</artifactId>
            <version>1.18.1</version>
            <exclusions>
                <!-- oh maven you crazy old bird! -->
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-core</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-web</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-beans</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-aop</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- Jetty Embedded App Container -->
        <!-- You only need this if you want to run the web app in the embedded jetty container using the RunApp class -->
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-server</artifactId>
            <version>9.2.0.v20140526</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-webapp</artifactId>
            <version>9.2.0.v20140526</version>
        </dependency>

        <!-- Util -->
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.4</version>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.2.4</version>
        </dependency>

        <!-- Groovy GMaven -->
        <dependency>
            <groupId>org.codehaus.gmaven</groupId>
            <artifactId>gmaven-plugin</artifactId>
            <version>1.4</version>
        </dependency>

    </dependencies>

    <build>
        <finalName>titan-web-example</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.4</version>
            </plugin>

            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.codehaus.gmaven</groupId>
                <artifactId>gmaven-plugin</artifactId>
                <version>1.4</version>
                <configuration>
                    <providerSelection>1.8</providerSelection>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>generateStubs</goal>
                            <goal>compile</goal>
                            <goal>generateTestStubs</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>

</project>

gmaven在eclipse中好像有问题，但是不知道怎么解决。

Answer 1

Eclipse 处理 Maven 项目的方式目前是通过 m2e 插件。

m2e不在下面调用 Maven，但解析 pom.xml 文件，并且对于提到的每个插件，调用代码显式编写为与插件在 m2e 中的行为相同。这就是“连接器”。

如果给定插件没有可用的连接器（因此 m2e 可以为您模拟它），您会看到此错误。不幸的是，这对于更稀有的插件来说并不少见。

您必须进行调查，看看是否足以让 m2e 能够呈现足够的项目以让您无论如何都可以工作，然后只需从命令行进行真正的构建。

对于这样一个麻烦的项目，您也可以考虑使用另一个免费的 IDE。我知道 IntelliJ 几乎可以处理任何 pom.xml 文件，并且听说 Netbeans 也可以。