为了可以生成jar包，首先需要在pom.xml中加入：
<!-- To create an executable jar-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>打开Project Structurue，选择Artifacts，点击新增，选择JAR，然后选择From modules with dependencies，选择要打包的Module，Main Class，设置jar包的输出位置，设置完毕。
选择Build-> Build Artifacts ->要打包的jar ->build，执行完毕后，在out文件夹下可以找到。
另外一个命令行的方法：
到pom所在目录，执行mvn package命令
D:\IdeaProjects\study>mvn package
[INFO] Scanning for projects...
[INFO]
[INFO] -------------------------< com.example:study >--------------------------
[INFO] Building study 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ study ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ study ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 2 source files to D:\IdeaProjects\study\target\classes
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ study ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\IdeaProjects\study\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ study ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\IdeaProjects\study\target\test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ study ---
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-junit4/2.22.2/surefire-junit4-2.22.2.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-junit4/2.22.2/surefire-junit4-2.22.2.pom (3.1 kB at 1.2 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-providers/2.22.2/surefire-providers-2.22.2.pom
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-providers/2.22.2/surefire-providers-2.22.2.pom (2.5 kB at 4.5 kB/s)
Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-junit4/2.22.2/surefire-junit4-2.22.2.jar
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/surefire/surefire-junit4/2.22.2/surefire-junit4-2.22.2.jar (85 kB at 51 kB/s)
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.example.study.StudyApplicationTests
15:14:11.962 [main] DEBUG org.springframework.test.context.junit4.SpringJUnit4ClassRunner - SpringJUnit4ClassRunner constructor called with [class com.example.study.StudyApplicationTests]
15:14:11.965 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
15:14:11.985 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
15:14:12.006 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [com.example.study.StudyApplicationTests] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
15:14:12.227 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.example.study.StudyApplicationTests], using SpringBootContextLoader
15:14:12.229 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.example.study.StudyApplicationTests]: class path resource [com/example/study/StudyApplicationTests-context.xml] does not exist
15:14:12.230 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [com.example.study.StudyApplicationTests]: class path resource [com/example/study/StudyApplicationTestsContext.groovy] does not exist
15:14:12.230 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.example.study.StudyApplicationTests]: no resource found for suffixes {-context.xml, Context.groovy}.
15:14:12.230 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.example.study.StudyApplicationTests]: StudyApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
15:14:12.281 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [com.example.study.StudyApplicationTests]
15:14:12.383 [main] DEBUG org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider - Identified candidate component class: file [D:\IdeaProjects\study\target\classes\com\example\study\StudyApplication.class]
15:14:12.384 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.example.study.StudyApplication for test class com.example.study.StudyApplicationTests
15:14:12.481 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [com.example.study.StudyApplicationTests]: using defaults.
15:14:12.481 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]
15:14:12.489 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
15:14:12.490 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
15:14:12.490 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@79924b, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@7b9a4292, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@4a94ee4, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@4cc451f2, org.springframework.test.context.support.DirtiesContextTestExecutionListener@6379eb, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@294425a7, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@67d48005, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@9f116cc, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@12468a38, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@1aa7ecca]
15:14:12.491 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.example.study.StudyApplicationTests]
15:14:12.491 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.example.study.StudyApplicationTests]
15:14:12.492 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.example.study.StudyApplicationTests]
15:14:12.492 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.example.study.StudyApplicationTests]
15:14:12.493 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.example.study.StudyApplicationTests]
15:14:12.493 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.example.study.StudyApplicationTests]
15:14:12.496 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@8f4ea7c testClass = StudyApplicationTests, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [WebMergedContextConfiguration@436813f3 testClass = StudyApplicationTests, locations = '{}', classes = '{class com.example.study.StudyApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@27808f31, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@1d8d30f7, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@44c8afef, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@e720b71], resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map['org.springframework.test.context.web.ServletTestExecutionListener.activateListener' -> true]], class annotated with @DirtiesContext [false] with mode [null].
15:14:12.497 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [com.example.study.StudyApplicationTests]
15:14:12.497 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [com.example.study.StudyApplicationTests]
15:14:12.537 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=-1}
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.6.RELEASE)
2019-08-08 15:14:12.803 INFO 15232 --- [ main] com.example.study.StudyApplicationTests : Starting StudyApplicationTests on PC-201907241146 with PID 15232 (started by Administrator in D:\IdeaProjects\study)
2019-08-08 15:14:12.804 INFO 15232 --- [ main] com.example.study.StudyApplicationTests : No active profile set, falling back to default profiles: default
2019-08-08 15:14:14.160 INFO 15232 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-08-08 15:14:14.330 INFO 15232 --- [ main] com.example.study.StudyApplicationTests : Started StudyApplicationTests in 1.786 seconds (JVM running for 2.837)
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.986 s - in com.example.study.StudyApplicationTests
2019-08-08 15:14:14.697 INFO 15232 --- [ Thread-3] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO]
[INFO] --- maven-jar-plugin:3.1.2:jar (default-jar) @ study ---
[INFO] Building jar: D:\IdeaProjects\study\target\study-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.1.6.RELEASE:repackage (repackage) @ study ---
[INFO] Replacing main artifact with repackaged archive
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 16.781 s
[INFO] Finished at: 2019-08-08T15:14:17+08:00
[INFO] ------------------------------------------------------------------------最终在target下生成jar。
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