如何删除我的WEB-INF / lib jar文件中的重复项？

Question

我知道在StackOverflow上似乎有很多关于我遇到的错误的讨论，但是我看不到完全相同的情况，我想更好地理解我遇到的问题。

我收到以下无法启动的错误“原因：org.apache.catalina.LifecycleException：子容器在启动期间失败”

进行一些研究之后，这似乎是一个WEB-INF / lib和/或pom.xml依赖性问题。人们似乎可以通过删除各种jar文件或更新其pom文件/删除各种特定依赖项来解决问题。

当我查看我的WEB-INF / lib jar文件时，似乎我正在复制...有谁知道我为什么要获得同一jar文件的double / 2版本，他们可以告诉我哪个依赖项吗？它们来自我的pom.xml文件吗？我认为我的项目不会在Tomcat上启动，并且由于重复而出现此问题，因为当它尝试启动其他重复的jar文件时，事情已经运行了一次。

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.6.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.mySite</groupId>
	<artifactId>mySitePortal</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<name>mySitePortal</name>
	<description>mySitePortal</description>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-mail</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-ldap</artifactId>
		</dependency>
		<dependency>
			<groupId>com.github.dblock.waffle</groupId>
			<artifactId>waffle-spring-security3</artifactId>
			<version>1.8.0</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security.kerberos</groupId>
			<artifactId>spring-security-kerberos-web</artifactId>
			<version>1.0.1.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<dependency>
			<groupId>org.thymeleaf.extras</groupId>
			<artifactId>thymeleaf-extras-java8time</artifactId>
			<version>3.0.0.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<version>1.4.2.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.microsoft.sqlserver</groupId>
			<artifactId>mssql-jdbc</artifactId>
			<version>6.1.0.jre8</version>
		</dependency>
		<dependency>
			<groupId>com.jayway.jsonpath</groupId>
			<artifactId>json-path</artifactId>
		</dependency>
		<!-- flying saucer pdf -->
		<dependency>
			<groupId>org.xhtmlrenderer</groupId>
			<artifactId>flying-saucer-pdf</artifactId>
			<version>9.1.4</version>
		</dependency>

		<!-- jxls simple excel -->
		<dependency>
			<groupId>org.jxls</groupId>
			<artifactId>jxls</artifactId>
			<version>2.4.3</version>
		</dependency>

		<dependency>
			<groupId>org.jxls</groupId>
			<artifactId>jxls-poi</artifactId>
			<version>1.0.14</version>
		</dependency>

		<dependency>
			<groupId>org.jxls</groupId>
			<artifactId>jxls-jexcel</artifactId>
			<version>1.0.6</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.metawidget.modules</groupId>
			<artifactId>metawidget-all</artifactId>
			<version>2.1</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>org.thymeleaf</groupId>
			<artifactId>thymeleaf</artifactId>
			<version>3.0.9.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>com.google.code.findbugs</groupId>
			<artifactId>annotations</artifactId>
			<version>3.0.1</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<executable>true</executable>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>

这是我的WEB-INF / lib jar的一个片段，显示了一些重复项。