SpringBoot应用程序上下文错误::Kotlin，Gradle，Database，Docker Postgresq

Question

我想在docker容器中的postgresql数据库和我的Project之间建立一个连接。Docker和所有东西都是通过Docker组合文件设置的，该文件如下所示：

version: '3.8'
services:
db:
container_name: postgres_container
image: postgres
restart: always
environment:
POSTGRES_DB: postgres_db
POSTGRES_USER: admin
POSTGRES_PASSWORD: secret
PGDATA: /var/lib/postgresql/data
ports:
- "5432:5432"
volumes:
- db-data:/var/lib/postgresql/data
pgadmin:
container_name: pgadmin4_container
image: dpage/pgadmin4:5.5
restart: always
environment:
PGADMIN_DEFAULT_EMAIL: [e-mail]
PGADMIN_DEFAULT_PASSWORD: secret
PGADMIN_LISTEN_PORT: 80
ports:
- "8080:80"
volumes:
- pgadmin-data:/var/lib/pgadmin
links:
- "db:pgsql-server"
volumes:
db-data:
pgadmin-data:

我的项目应该用Kotlin编写，我已经用初始值设定项设置了Spring Boot，如下所示：

在此处输入图像描述

我已将以下内容添加到应用程序属性文件中，以获得与数据库的连接。

spring.datasource.url=jdbc:postgresql://localhost:5432/postgres_db
spring.datasource.username=admin
spring.datasource.password=secret
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=update

这是我的main文件：

package com.nosiaj.nstudycloud
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
@SpringBootApplication
class NstudycloudApplication
fun main(args: Array<String>) {
runApplication<NstudycloudApplication>(*args)
}

我想通过代码创建一个表

package com.nosiaj.nstudycloud.entity
import javax.persistence.Entity
import javax.persistence.Id
import javax.persistence.Table
@Table(name="customer")
@Entity
class Customer {
@Id
private var uId: String = TODO("initialize me")
private val firstName: String
private val lastName: String
private val email: String
private val phone: String
private val IBAN: String

}

这是我的build.gradle.kts文件：

plugins {
id("org.springframework.boot") version "2.7.2"
id("io.spring.dependency-management") version "1.0.12.RELEASE"
kotlin("jvm") version "1.6.21"
kotlin("plugin.spring") version "1.6.21"
kotlin("plugin.jpa") version "1.6.21"
}
group = "com.nosiaj"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_17
repositories {
mavenCentral()
}
dependencies {
implementation("org.springframework.boot:spring-boot-starter-data-jpa")
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
implementation("org.jetbrains.kotlin:kotlin-reflect")
implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
runtimeOnly("org.postgresql:postgresql")
testImplementation("org.springframework.boot:spring-boot-starter-test")
}
tasks.withType<KotlinCompile> {
kotlinOptions {
freeCompilerArgs = listOf("-Xjsr305=strict")
jvmTarget = "17"
}
}
tasks.withType<Test> {
useJUnitPlatform()
}

现在，当我启动应用程序时，它连接到数据库并创建表，但我仍然收到错误，服务器停止。这是输出：

.   ____          _            __ _ _
/\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
\/  ___)| |_)| | | | | || (_| |  ) ) ) )
'  |____| .__|_| |_|_| |___, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot ::                (v2.7.2)
2022-08-07 16:54:22.736  INFO 55209 --- [           main] c.n.n.NstudycloudApplicationKt           : Starting NstudycloudApplicationKt using Java 17.0.4 on simba-desktop with PID 55209 (/home/simba/Dokumente/Project/nstudycloud/nstudycloud/build/classes/kotlin/main started by simba in /home/simba/Dokumente/Project/nstudycloud/nstudycloud)
2022-08-07 16:54:22.739  INFO 55209 --- [           main] c.n.n.NstudycloudApplicationKt           : No active profile set, falling back to 1 default profile: "default"
2022-08-07 16:54:23.342  INFO 55209 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-08-07 16:54:23.359  INFO 55209 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 3 ms. Found 0 JPA repository interfaces.
2022-08-07 16:54:23.743  INFO 55209 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-08-07 16:54:23.750  INFO 55209 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-08-07 16:54:23.751  INFO 55209 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.65]
2022-08-07 16:54:23.812  INFO 55209 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-08-07 16:54:23.812  INFO 55209 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1026 ms
2022-08-07 16:54:23.949  INFO 55209 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-08-07 16:54:23.991  INFO 55209 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 5.6.10.Final
2022-08-07 16:54:24.110  INFO 55209 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-08-07 16:54:24.182  INFO 55209 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2022-08-07 16:54:24.286  INFO 55209 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2022-08-07 16:54:24.298  INFO 55209 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
2022-08-07 16:54:24.594  INFO 55209 --- [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-08-07 16:54:24.602  INFO 55209 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2022-08-07 16:54:24.635  WARN 55209 --- [           main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2022-08-07 16:54:24.928  WARN 55209 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
2022-08-07 16:54:24.930  INFO 55209 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2022-08-07 16:54:24.932  INFO 55209 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2022-08-07 16:54:24.938  INFO 55209 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
2022-08-07 16:54:24.943  INFO 55209 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2022-08-07 16:54:24.955  INFO 55209 --- [           main] ConditionEvaluationReportLoggingListener : 
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-08-07 16:54:24.975 ERROR 55209 --- [           main] o.s.boot.SpringApplication               : Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.22.jar:5.3.22]
at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.2.jar:2.7.2]
at com.nosiaj.nstudycloud.NstudycloudApplicationKt.main(NstudycloudApplication.kt:13) ~[main/:na]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat server
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:229) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:43) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.22.jar:5.3.22]
... 14 common frames omitted
Caused by: java.lang.IllegalArgumentException: standardService.connector.startFailed
at org.apache.catalina.core.StandardService.addConnector(StandardService.java:238) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.addPreviouslyRemovedConnectors(TomcatWebServer.java:282) ~[spring-boot-2.7.2.jar:2.7.2]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.start(TomcatWebServer.java:213) ~[spring-boot-2.7.2.jar:2.7.2]
... 16 common frames omitted
Caused by: org.apache.catalina.LifecycleException: Protocol handler start failed
at org.apache.catalina.connector.Connector.startInternal(Connector.java:1077) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.StandardService.addConnector(StandardService.java:234) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
... 18 common frames omitted
Caused by: java.net.BindException: Die Adresse wird bereits verwendet
at java.base/sun.nio.ch.Net.bind0(Native Method) ~[na:na]
at java.base/sun.nio.ch.Net.bind(Net.java:555) ~[na:na]
at java.base/sun.nio.ch.ServerSocketChannelImpl.netBind(ServerSocketChannelImpl.java:337) ~[na:na]
at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:294) ~[na:na]
at org.apache.tomcat.util.net.NioEndpoint.initServerSocket(NioEndpoint.java:275) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:230) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.net.AbstractEndpoint.bindWithCleanup(AbstractEndpoint.java:1227) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.net.AbstractEndpoint.start(AbstractEndpoint.java:1313) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.coyote.AbstractProtocol.start(AbstractProtocol.java:614) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.connector.Connector.startInternal(Connector.java:1074) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
... 20 common frames omitted

Process finished with exit code 1

那么为什么会出现这个错误呢？我该如何解决？我不知道我做错了什么，如果有人能帮助我，那真的很棒！！

非常感谢！！

Answer 1

这意味着另一个进程正在同一端口上运行，所以您必须杀死它。

首先，列出哪个应用程序使用哪个端口，并获取它的pid

lsof -i:8080

然后用杀死它

kill <pid>