未能在项目 mavenproject2: 上执行目标 org.codehaus.mojo:exec-maven-plug

Question

我开始尝试在Java中使用Vert.x。IDE 是 Netbeans 8.1 版。Vert.x 是版本 3.0.0。此项目的代码如下所示。下面还列出了pom.xml文件。此代码将在 Netbeans IDE 中运行，但如果没有下面的"生成报告"中显示的错误，则生成（对于 jar 文件）将无法完成。因此，生成的 jar 文件将不会执行。我已经研究了我在互联网上可以找到的所有资源，但找不到合适的解决方案/答案。我将不胜感激任何人可以提供的任何帮助来解决这个问题。

POM 文件由 Netbeans IDE 在创建新项目时生成：文件 - 新项目 - Maven - 原型项目 - vertx-java-archetype然后我添加了 main（） 方法。

详细的构建错误报告：

    --- maven-jar-plugin:2.3.2:jar (default-jar) @ mavenproject2 ---
    Building jar: C:ProjectsGenMatchJmavenproject2targetmavenproject2-1.0-SNAPSHOT.jar
    --- maven-shade-plugin:2.3:shade (default) @ mavenproject2 ---
    Including io.vertx:vertx-core:jar:3.0.0 in the shaded jar.
    Including io.netty:netty-common:jar:4.0.28.Final in the shaded jar.
    Including io.netty:netty-buffer:jar:4.0.28.Final in the shaded jar.
    Including io.netty:netty-transport:jar:4.0.28.Final in the shaded jar.
    Including io.netty:netty-handler:jar:4.0.28.Final in the shaded jar.
    Including io.netty:netty-codec:jar:4.0.28.Final in the shaded jar.
    Including io.netty:netty-codec-http:jar:4.0.28.Final in the shaded jar.
    Including com.fasterxml.jackson.core:jackson-core:jar:2.5.3 in the shaded jar.
    Including com.fasterxml.jackson.core:jackson-databind:jar:2.5.3 in the shaded jar.
    Including com.fasterxml.jackson.core:jackson-annotations:jar:2.5.0 in the shaded jar.
    Including io.vertx:vertx-web:jar:3.0.0 in the shaded jar.
    Including io.vertx:vertx-auth-common:jar:3.0.0 in the shaded jar.
    --- exec-maven-plugin:1.3.2:exec (default) @ mavenproject2 ---
    ------------------------------------------------------------------------
    BUILD FAILURE
    ------------------------------------------------------------------------
    Total time: 3.290s
    Finished at: Sun Jun 05 13:01:40 EDT 2016
    Final Memory: 30M/313M
    ------------------------------------------------------------------------
    Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.3.2:exec (default) on project mavenproject2: The parameters 'executable' for goal org.codehaus.mojo:exec-maven-plugin:1.3.2:exec are missing or invalid -> [Help 1]
To see the full stack trace of the errors, re-run Maven with the -e switch.
Re-run Maven using the -X switch to enable full debug logging.
For more information about the errors and possible solutions, please read the following articles:
[Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginParameterException

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.ssp</groupId>
  <artifactId>mavenproject2</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.vertx</groupId>
        <artifactId>vertx-dependencies</artifactId>
        <version>3.0.0</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>
    <dependency>
      <groupId>io.vertx</groupId>
      <artifactId>vertx-core</artifactId>
    </dependency>
    <dependency>
      <groupId>io.vertx</groupId>
      <artifactId>vertx-web</artifactId>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.3</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>2.3</version>
        <executions>
          <execution>
            <phase>package</phase>
            <goals>
              <goal>shade</goal>
            </goals>
            <configuration>
              <transformers>
                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  <manifestEntries>
                    <Main-Class>io.vertx.core.Starter</Main-Class>
                    <Main-Verticle>com.ssp.mavenproject2.Main</Main-Verticle>
                  </manifestEntries>
                </transformer>
                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                  <resource>META-INF/services/io.vertx.core.spi.VerticleFactory</resource>
                </transformer>
              </transformers>
              <artifactSet></artifactSet>
              <outputFile>${project.build.directory}/mavenproject2-${project.version}-fat.jar</outputFile>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>exec-maven-plugin</artifactId>
        <version>1.3.2</version>
        <executions>
          <execution>
            <phase>verify</phase>
            <goals>
              <goal>exec</goal>
            </goals>
          </execution>
        </executions>
        <configuration>
          <mainClass>io.vertx.core.Starter</mainClass>
          <additionalClasspathElements>
            <additionalClasspathElement>${basedir}/src/main/java/</additionalClasspathElement>
          </additionalClasspathElements>
          <systemProperties>
            <systemProperty>
              <key>vertx.deployment.options.redeploy</key>
              <value>true</value>
            </systemProperty>
            <systemProperty>
              <key>vertx.deployment.options.redeployScanPeriod</key>
              <value>100</value>
            </systemProperty>
          </systemProperties>
          <arguments>
            <argument>run</argument>
            <argument>com/ssp/mavenproject2/Main.java</argument>
            <!--                  <argument>-cluster</argument>
            <argument>-cluster-host</argument>
            <argument>127.0.0.1</argument>-->
          </arguments>
        </configuration>
      </plugin>
    </plugins>
  </build>
    <name>MainSsp</name>
    <description>Main entry point for SSP Example with embedded Vert.x</description>
</project>

源代码：

package com.ssp.mavenproject2;
import io.vertx.core.AbstractVerticle;
import io.vertx.core.Vertx;
import javax.swing.JOptionPane;

/**
 *
 */
public class Main extends AbstractVerticle {
  public static void main(String[] args) {

      JOptionPane.showMessageDialog(null, "This Vert.x/Java integration is UUUGGGGHH tough without documentation...");

      // Create an HTTP server which simply returns "Hello World!" to each request.
      Vertx.vertx().createHttpServer().requestHandler(req -> req.response().end("Hello World!")).listen(8080);
      Vertx.vertx().setPeriodic(3000, res -> {
        System.out.println("Periodic event triggered.");
      });
      try{
          Thread.sleep(30000);
      }catch(Exception e)
      {
         System.out.println("Exception caught");
      }
  }  
  @Override
  public void start() throws Exception {
    vertx.setPeriodic(3000, res -> {
      System.out.println("Periodic event triggered.");
    });
  }
}

Answer 1

看起来您正在尝试运行mvn exec:exec但为此您需要指定可执行文件（您遇到的错误）。在这种情况下，可执行文件应该是你的java二进制文件，例如：/usr/java/latest/bin/java如果你使用的是linux和Oracle RPM。

或者，您应该执行以下操作：mvn exec:java知道可执行文件是java的，并且知道如何从pom文件中选择类路径依赖项。

现在，如果您注意代码，您会发现永远不会调用public static void main方法，您的exec插件使用vert.x启动器而不是您的类，因此当您的应用程序启动时，不会有任何服务器，只有start方法内部执行的周期性代码。

如果你执行你的主，那么你仍然缺少部署你的顶点，所以你有服务器但没有定期任务，为了实现这一点，你需要添加：

vertx.deployVerticle(Main.class.getName());

Answer 2

允许 Netbeans 索引 maven 存储库

~.m2repositoryorgcodehausmojo

存储库被索引后，一切应该可以正常工作。