有知道这个问题怎么解决的吗？一直没有解决

Question

[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.sikiedu:MavenSSM2:war:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.apache.tomcat.maven:tomcat7-maven-plugin @ line 309, column 13
[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] -----------------------< com.sikiedu:MavenSSM2 >------------------------
[INFO] Building MavenSSM2 0.0.1-SNAPSHOT
[INFO] --------------------------------[ war ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ MavenSSM2 ---
[INFO] Deleting C:\Users\Mr.Li\Desktop\工作室\作业\Java\HelloMaven\target
[INFO]
[INFO] >>> tomcat7-maven-plugin:2.2:deploy (default-cli) > package @ MavenSSM2 >>>
[WARNING] The POM for cn.easyproject:ojdbc7:jar:12.1.0.2.0 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for javax.servlet:jstl:jar:1.2 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for commons-fileupload:commons-fileupload:jar:1.3.1 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ MavenSSM2 ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO] Copying 5 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.0:compile (default-compile) @ MavenSSM2 ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 8 source files to C:\Users\Mr.Li\Desktop\工作室\作业\Java\HelloMaven\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ MavenSSM2 ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.0:testCompile (default-testCompile) @ MavenSSM2 ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ MavenSSM2 ---
[INFO]
[INFO] --- maven-war-plugin:2.2:war (default-war) @ MavenSSM2 ---
[INFO] Packaging webapp
[INFO] Assembling webapp [MavenSSM2] in [C:\Users\Mr.Li\Desktop\工作室\作业\Java\HelloMaven\target\MavenSSM2-0.0.1-SNAPSHOT]
[INFO] Processing war project
[INFO] Copying webapp resources [C:\Users\Mr.Li\Desktop\工作室\作业\Java\HelloMaven\src\main\webapp]
[INFO] Webapp assembled in [216 msecs]
[INFO] Building war: C:\Users\Mr.Li\Desktop\工作室\作业\Java\HelloMaven\target\MavenSSM2-0.0.1-SNAPSHOT.war
[INFO] WEB-INF\web.xml already added, skipping
[INFO]
[INFO] <<< tomcat7-maven-plugin:2.2:deploy (default-cli) < package @ MavenSSM2 <<<
[INFO]
[INFO]
[INFO] --- tomcat7-maven-plugin:2.2:deploy (default-cli) @ MavenSSM2 ---
[INFO] Deploying war to http://localhost:8080/MavenSSM2

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 8.940 s
[INFO] Finished at: 2019-07-29T15:56:55+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.tomcat.maven:tomcat7-maven-plugin:2.2:deploy (default-cli) on project MavenSSM2: Cannot invoke Tomcat manager: Connection refused: connect -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

Answer 1

https://blog.csdn.net/sz15732624895/article/details/82151055