elasticsearch引用jar包与其他jar冲突解决办法

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问题提出：

官网blog：https://www.elastic.co/blog/to-shade-or-not-to-shade

比如你的项目中引用的Joda 2.1，而elasticsearch 2.2.0引用的Joda 2.8，则在使用elasticsearch的时候以为会先找到Joda 2.1，导致elasticsearch用不起来，所以怎么解决呢

1.新建一个maven项目进行如下配置

<properties><elasticsearch.version>2.0.0-beta2</elasticsearch.version></properties><dependencies><dependency>    <groupId>org.elasticsearch</groupId>    <artifactId>elasticsearch</artifactId>    <version>${elasticsearch.version}</version></dependency><dependency>    <groupId>org.elasticsearch.plugin</groupId>    <artifactId>shield</artifactId>    <version>${elasticsearch.version}</version></dependency><dependency>    <groupId>joda-time</groupId>    <artifactId>joda-time</artifactId>    <version>2.1</version></dependency></dependencies>

2.隐藏elasticsearch

<groupId>my.elasticsearch.test</groupId><artifactId>es-shaded</artifactId><version>1.0-SNAPSHOT</version><properties><elasticsearch.version>2.0.0-beta2</elasticsearch.version></properties><dependencies><dependency>    <groupId>org.elasticsearch</groupId>    <artifactId>elasticsearch</artifactId>    <version>${elasticsearch.version}</version></dependency><dependency>    <groupId>org.elasticsearch.plugin</groupId>    <artifactId>shield</artifactId>    <version>${elasticsearch.version}</version></dependency></dependencies><repositories><repository>    <id>elasticsearch-releases</id>    http://maven.elasticsearch.org/releases    <releases>        <enabled>true</enabled>        <updatePolicy>daily</updatePolicy>    </releases>    <snapshots>        <enabled>false</enabled>    </snapshots></repository></repositories>

3.将elasticsearch中冲突的jar包

<build><plugins>    <plugin>        <groupId>org.apache.maven.plugins</groupId>        <artifactId>maven-shade-plugin</artifactId>        <version>2.4.1</version>        <executions>            <execution>                <phase>package</phase>                <goals>                    <goal>shade</goal>                </goals>                <configuration>                    <relocations>                        <relocation>                            <pattern>org.joda</pattern>                            <shadedPattern>my.elasticsearch.joda</shadedPattern>                        </relocation>                    </relocations>                    <transformers>                        <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer" />                    </transformers>                </configuration>            </execution>        </executions>    </plugin></plugins></build>

4.你的项目中引用

<!--This artifact contains all elasticsearch libs includingthe shaded version of Joda and Shield --><dependency><groupId>my.elasticsearch.test</groupId><artifactId>es-shaded</artifactId><version>1.0-SNAPSHOT</version></dependency>        <!--         You still use your own Joda version        --><dependency><groupId>joda-time</groupId><artifactId>joda-time</artifactId><version>2.1</version></dependency>

5.使用 elasticsearch

TransportClient client = TransportClient.builder()          .settings(Settings.builder()                  .put("path.home", ".")                  .put("shield.user", "username:password")                  .put("plugin.types", "org.elasticsearch.shield.ShieldPlugin")          )          .build();client.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("localhost", 9300)));

6说明

你可以使用org.joda.time.DateTime(2.1版本的)，也可以使用my.elasticsearch.joda.time.DateTime(2.8版本的，不推荐用这个，而是直接用org.joda.time.DateTime)

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