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查某个包的依赖树
mvn dependency:tree -Dverbose -Dincludes=com.ctrip.flight.common:logcube:jar

将依赖树输出到a.txt，可用于检测依赖冲突
mvn dependency:tree>a.txt

分析依赖树输出到b.txt，可用于判断某个包是否被使用，用于决定可不可以删除某个包
mvn dependency:analyze>b.txt