maven基础

依赖冲突

打开IDEA右侧的maven栏，点开dependency总是会看到很多maven依赖是灰色提示。

omitted for duplicate:表示重复依赖
omitted for conflict with x.x.x:表示依赖已经冲突

mvn dependency:tree -Dverbose可以列出项目的所有依赖以及传递性依赖。

另一种方法是

            <!-- 强制检查maven依赖 在build中添加 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-enforcer-plugin</artifactId>
                <version>1.4.1</version>
                <executions>
                    <execution>
                        <id>enforce</id>
                        <configuration>
                            <rules>
                                <dependencyConvergence/>
                            </rules>
                        </configuration>
                        <goals>
                            <goal>enforce</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

加入上面插件之后，编译的时候有冲突的话就会有错误提示。

Dependency convergence error for org.apache.spark:spark-core_2.11:2.1.0 paths to dependency are:
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-streaming_2.11:2.1.0
    +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-sql_2.11:2.1.0
    +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-sql_2.11:2.1.0
    +-org.apache.spark:spark-catalyst_2.11:2.1.0
      +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-hive_2.11:2.1.0
    +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-mllib_2.11:2.1.0
    +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-mllib_2.11:2.1.0
    +-org.apache.spark:spark-graphx_2.11:2.1.0
      +-org.apache.spark:spark-core_2.11:2.1.0
and
+-com.fantasy:SparkSQLInAction:1.0-SNAPSHOT
  +-org.apache.spark:spark-yarn_2.11:2.1.1
    +-org.apache.spark:spark-core_2.11:2.1.1

maven基础

依赖冲突

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