java - 由于缺少 ServletWebServerFactory，无法启动 Web 服务器

Question

几天前我看过 Stack Overflow。我的问题似乎很常见，但我无法解决它。

我已经尝试过这些方法1和 2 .

这是我的 application.propreties :

spring.datasource.driver-class-name= org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5433/mydatabase
spring.datasource.username=username
spring.datasource.password=password
spring.jpa.hibernate.ddl-auto=create
spring.main.web-application-type=none

当我尝试运行它时，它给出了以下错误:

org.springframework.context.ApplicationContextException: Unable to start web server; 
nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean

这是我的主要类(class):

@SpringBootApplication
public class StartApplication {

    @Autowired
    BookRepository repository;

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

这是我的 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>toto</groupId>
    <artifactId>toto</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
    </parent>
    <properties>
        <java.version>1.8</java.version>
        <downloadSources>true</downloadSources>
        <downloadJavadocs>true</downloadJavadocs>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.1.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.0</version>
            </plugin>
        </plugins>
    </build>
</project>

预先感谢您的帮助。

Answer 1

您应该从 application.properties 文件中删除以下属性

spring.main.web-application-type=none

这意味着您的应用程序中不需要 Web 服务器。