パッケージ・エクスプローラー画面で「Maven依存関係」の中に「mysql-connector-java-5.1.45.jar」が格納されません

前提・実現したいこと

初質問です。
eclipseにてMaven projectを新規に作成しpomを設定しているのですがpom設定画面にて一行目
の最後の部分 http://maven.apache.org/xsd/maven-4.0.0.xsd">　4.0.0.xsdのところにエラーが発生しました。

その後
パッケージ・エクスプローラー画面で「Maven依存関係」の中に「mysql-connector-java-5.1.45.jar」が格納されません

どう解決すればよろしいでしょうか
何卒よろしくお願いいたします。

発生している問題・エラーメッセージ

Execution default-testResources of goal org.apache.maven.plugins:maven-resources-plugin:2.6:testResources failed: Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved: The following artifacts could not be resolved: classworlds:classworlds:jar:1.1, org.codehaus.plexus:plexus-utils:jar:2.0.5, org.apache.maven.shared:maven-filtering:jar:1.1, org.codehaus.plexus:plexus-interpolation:jar:1.13: Failure to transfer classworlds:classworlds:jar:1.1 from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact classworlds:classworlds:jar:1.1 from/to central (https://repo.maven.apache.org/maven2): repo.maven.apache.org (org.apache.maven.plugins:maven-resources-plugin:2.6:testResources:default-testResources:process-test-resources)

org.apache.maven.plugin.PluginExecutionException: Execution default-testResources of goal org.apache.maven.plugins:maven-resources-plugin:2.6:testResources failed: Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved: The following artifacts could not be resolved: classworlds:classworlds:jar:1.1, org.codehaus.plexus:plexus-utils:jar:2.0.5, org.apache.maven.shared:maven-filtering:jar:1.1, org.codehaus.plexus:plexus-interpolation:jar:1.13: Failure to transfer classworlds:classworlds:jar:1.1 from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact classworlds:classworlds:jar:1.1 from/to central (https://repo.maven.apache.org/maven2):

該当のソースコード

Java
1<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">
2  <modelVersion>4.0.0</modelVersion>
3  <groupId>jp.example</groupId>
4  <artifactId>techacademy_jdbc</artifactId>
5  <version>0.0.1-SNAPSHOT</version>
6  <build>
7    <sourceDirectory>src</sourceDirectory>
8    <plugins>
9      <plugin>
10        <artifactId>maven-compiler-plugin</artifactId>
11        <version>3.5.1</version>
12        <configuration>
13          <source>1.8</source>
14          <target>1.8</target>
15        </configuration>
16      </plugin>
17    </plugins>
18  </build>
19  <dependencies>
20      <dependency>
21          <groupId>mysql</groupId>
22          <artifactId>mysql-connector-java</artifactId>
23          <version>5.1.45</version>
24      </dependency>
25  </dependencies>
26</project>
27