我的依赖定义有什么问题？

Question

<?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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.cassandra</groupId>
<artifactId>simple-client</artifactId>
<packaging>jar</packaging>
<version>0.1.0</version>

 <dependencies>
  <dependency>
   <groupId>com.datastax.cassandra</groupId>
   <artifactId>cassandra-driver-core</artifactId>
   <version>2.1.0</version>
   <scope>test</scope>
  </dependency>
 </dependencies>

 <build>
  <plugins>
   <plugin>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>exec-maven-plugin</artifactId>
      <version>1.3.2</version>
      <configuration>
         <mainClass>com.example.cassandra.Client</mainClass>
      </configuration>
    </plugin>
  </plugins>
 </build>
 </project>

 package com.example.cassandra;

 import com.datastax.driver.core.Cluster;

 public class Client
 {
   // private Cluster cluster;

      public static void main(String a[])
      {
         System.out.println("I am in");
      }
  }

我用

  mvn -e compile

上面写着

  [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler- 
     plugin:2.0.2:compile (default-compile) on project simple-client:   
     Compilation failure
  [ERROR] /cassandra/src/main/java/com/example/cassandra/Client.java:[3,31] 
     error: package com.datastax.driver.core does not exist
  [ERROR] -> [Help 1]
     org.apache.maven.lifecycle.LifecycleExecutionException: Failed to  
     execute goal org.apache.maven.plugins:maven-compiler- 
     plugin:2.0.2:compile (default-compile) on project simple-client:   
     Compilation failure
     /cassandra/src/main/java/com/example/cassandra/Client.java:[3,31]  
     error: package com.datastax.driver.core does not exist

我知道依赖项JAR是添加不当，因为它抱怨包不存在。我应该在哪里添加依赖项，以便我的代码能够成功地编译和调谐？

  Cassandra
     pom.xml
     src
        main
          java
            com
              example
                cassandra
                  Client.java

Answer 1

这是由于您指定的依赖关系范围。通过不指定作用域，默认为compile。

来自Maven文档：

依赖项作用域用于限制依赖项的传递性，也用于影响用于各种构建任务的类路径。

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