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Found duplicate classes/resources

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10/28
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很可能是多个三方依赖重复了，依赖个插件，这个插件能查找出依赖关系，

duplicate-finder-maven-plugin

使用命令显示

mvn dependency:tree

[INFO] \- org.springframework.cloud:spring-cloud-bus:jar:2.0..RELEASE:compile
[INFO] +- org.springframework.cloud:spring-cloud-stream:jar:2.0..RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-validation:jar:2.0..RELEASE:compile
[INFO] | +- org.springframework:spring-messaging:jar:5.0..RELEASE:compile
[INFO] | +- org.springframework:spring-tuple:jar:1.0..RELEASE:compile
[INFO] | | \- com.esotericsoftware:kryo-shaded:jar:3.0.:compile
[INFO] | | \- com.esotericsoftware:minlog:jar:1.3.:compile
[INFO] | +- org.springframework.integration:spring-integration-tuple:jar:1.0..RELEASE:compile
[INFO] | \- org.springframework.retry:spring-retry:jar:1.2..RELEASE:compile
[INFO] \- org.springframework.integration:spring-integration-core:jar:5.0..RELEASE:compile
[INFO] \- io.projectreactor:reactor-core:jar:3.1..RELEASE:compile
[INFO] \- org.reactivestreams:reactive-streams:jar:1.0.:compile

可以清楚看出依赖关系，

然后在导入依赖的地方exclusion掉名字重复，没在用的就行.