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试图刷新我的 j2ee 所以下载了一个 Spring initializr 压缩文件夹并导入 IntelliJ。

尝试将其作为 Java 应用程序运行时出现以下错误。 

2019-11-04 12:50:35.702  INFO 5900 --- [           main] com.example.spring.demo.DemoApplication  : Starting DemoApplication on DESKTOP-OPAMEU4 with PID 5900 (C:\JavaWS\demo\demo\target\classes started by hemis in C:\JavaWS\demo\demo)
2019-11-04 12:50:35.705  INFO 5900 --- [           main] com.example.spring.demo.DemoApplication  : No active profile set, falling back to default profiles: default
2019-11-04 12:50:36.413  INFO 5900 --- [           main] com.example.spring.demo.DemoApplication  : Started DemoApplication in 1.24 seconds (JVM running for 2.4)

Process finished with exit code 0

下面是我的 pom.xml

<?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 https://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>2.2.1.BUILD-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example.spring</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>13.0.1</java.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

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

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

有什么线索吗？

4

1 回答 1

2

鉴于您的项目只是从 spring 初始化程序生成的，它还没有真正做任何事情，您必须添加一些功能使其不会立即退出。

如果您希望它作为 webapp 启动，则必须添加对spring-boot-starter-web.

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

如果您更喜欢tomcat作为容器，则可以使用上述依赖项，但如果您更喜欢其他东西 - 就像jetty您必须tomcat从spring-boot-starter-web

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jetty</artifactId>
</dependency>

然后你会在开始运行时得到接近这个的东西DemoApplication

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::  (v2.2.1.BUILD-SNAPSHOT)

2019-11-04 19:38:57.796  INFO 11674 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication on hostname with PID 11674 (/tmp/demo/target/classes started by user in /tmp/demo)
2019-11-04 19:38:57.800  INFO 11674 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to default profiles: default
2019-11-04 19:38:58.446  INFO 11674 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-11-04 19:38:58.451  INFO 11674 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-11-04 19:38:58.451  INFO 11674 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.27]
2019-11-04 19:38:58.487  INFO 11674 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-11-04 19:38:58.487  INFO 11674 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 641 ms
2019-11-04 19:38:58.583  INFO 11674 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-11-04 19:38:58.690  INFO 11674 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2019-11-04 19:38:58.692  INFO 11674 --- [           main] com.example.demo.DemoApplication         : Started DemoApplication in 1.148 seconds (JVM running for 1.714)
于 2019-11-04T18:49:29.293 回答