引言：如何使用IDEA查看maven的依赖树呢？您可能检索到很多答案，但是发现自己的IDEA没有这个按钮or选项！那么，这篇文章来了。
- show dependencies按钮
注意一定要选择项目module，没有选择项目选择了maven配置选择，不会出现：
亲测idea2020.1有集成此功能，但是2020.3没有
- Diagrams-show dependencies选项
打开pom.xml文件，右键，maven-show dependencies或者iagrams-show dependenies。
有些下伙伴可能会发现，自己右键没有这个选项，那么在插件里面安装下UML support插件再试哦：
- ?Maven Helper插件
安装Maven Helper插件，打开pom.xml下方有show dependendcies的tab功能。
- mvn dependency:tree命令
在pom目录先执行mvn dependency:tree命令会显示依赖关系，但是不会像uml文件展示那么具象化。
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for esshop:esshop:war:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 621,
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building esshop Maven Webapp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ esshop ---
[INFO] esshop:esshop:war:0.0.1-SNAPSHOT
[INFO] +- commons-collections:commons-collections:jar:3.2.1:compile
[INFO] +- org.hibernate:hibernate:jar:3.2.2.ga:compile
[INFO] | \- (commons-collections:commons-collections:jar:2.1.1:compile - omitted for conflict with 3.2.1)
[INFO] +- org.hibernate:hibernate-annotations:jar:3.4.0.GA:compile
[INFO] | \- org.hibernate:hibernate-core:jar:3.3.0.SP1:compile
[INFO] | \- (commons-collections:commons-collections:jar:3.1:compile - omitted for conflict with 3.2.1)
[INFO] +- org.springframework.security:spring-security-core:jar:2.0.4:compile
[INFO] | \- (commons-collections:commons-collections:jar:3.2:compile - omitted for conflict with 3.2.1)
[INFO] +- org.apache.velocity:velocity:jar:1.5:compile
[INFO] | \- (commons-collections:commons-collections:jar:3.1:compile - omitted for conflict with 3.2.1)
[INFO] \- net.sf.json-lib:json-lib:jar:jdk15:2.4:compile
[INFO] \- (commons-collections:commons-collections:jar:3.2.1:compile - omitted for duplicate)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS四种方法，一定有适合你的，对其中任何一种有疑问，可以针对性的检索资料看看哦~
Do i explain clearly to you?ths for reading!
