Java 如果AppContext初始化失败，则正确终止Spring引导和Tomcat

当我在嵌入式Tomcat上启动Spring引导应用程序时，在启动过程中出现了一些故障（例如，没有连接到DB或Liquibase更新失败，或者发现了循环依赖项等），Tomcat继续在8080端口上侦听

如果我向某个端点发送HTTP请求，应用程序将返回404NotFound

这是预期的行为（Tomcat是否应该继续侦听）

当应用程序上下文初始化失败时，如何停止Spring引导和Tomcat

下面是日志的示例：

org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tomcatEmbeddedServletContainerFactory' defined in class path resource [org/springframework/boot/autoconfigure/web/EmbeddedServletContainerAutoConfiguration$EmbeddedTomcat.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverProperties' defined in class path resource [org/springframework/boot/autoconfigure/web/ServerPropertiesAutoConfiguration.class]: Initialization of bean failed; nested exception is javax.validation.ValidationException: Unable to instantiate Configuration.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:536)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
    at com.test.Application.main(Application.java:33)

在此异常之后，Tomcat在指定端口上仍然可用

UPD

application.properties：

spring.profiles.default=production
spring.application.name=test

spring.datasource.url=jdbc:postgresql://localhost:5432/testdb
spring.datasource.username=test
spring.datasource.password=test123
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect

spring.jpa.hibernate.ddl-auto=none

liquibase.change-log=classpath:/liquibase/changelog.xml

依赖项：

<properties>
    <spring.boot.version>1.5.9.RELEASE</spring.boot.version>

    <liquibase.version>3.5.3</liquibase.version>
    <postgresql.version>9.4-1201-jdbc41</postgresql.version>
    <hsqldb.version>2.4.0</hsqldb.version>

    <powermock.version>1.7.3</powermock.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>${spring.boot.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.apache.tomcat.embed</groupId>
                <artifactId>tomcat-embed-el</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.apache.tomcat</groupId>
                <artifactId>tomcat-annotations-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
        <version>${spring.boot.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.apache.tomcat</groupId>
                <artifactId>tomcat-juli</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
        <version>${spring.boot.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.codehaus.groovy</groupId>
                <artifactId>groovy</artifactId>
            </exclusion>
            <exclusion>
                <groupId>nz.net.ultraq.thymeleaf</groupId>
                <artifactId>thymeleaf-layout-dialect</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-autoconfigure</artifactId>
        <version>${spring.boot.version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
        <version>${spring.boot.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <version>${spring.boot.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>4.3.14.RELEASE</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>${postgresql.version}</version>
    </dependency>

    <dependency>
        <groupId>org.liquibase</groupId>
        <artifactId>liquibase-core</artifactId>
        <version>${liquibase.version}</version>
        <scope>compile</scope>
    </dependency>

    <dependency>
        <groupId>org.hsqldb</groupId>
        <artifactId>hsqldb</artifactId>
        <version>${hsqldb.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>${powermock.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-mockito</artifactId>
        <version>${powermock.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest-library</artifactId>
        <version>${hamcrest.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest-core</artifactId>
        <version>${hamcrest.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>com.google.code.simple-spring-memcached</groupId>
        <artifactId>spring-cache</artifactId>
        <version>3.6.1</version>
        <exclusions>
            <exclusion>
                <groupId>org.hamcrest</groupId>
                <artifactId>hamcrest-core</artifactId>
            </exclusion>
            <exclusion>
                <groupId>commons-collections</groupId>
                <artifactId>commons-collections</artifactId>
            </exclusion>
            <exclusion>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.codehaus.janino</groupId>
        <artifactId>janino</artifactId>
        <version>3.0.8</version>
    </dependency>

    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
    </dependency>

    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>1.2.3</version>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>${spring.boot.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

---

在这种情况下可能有两种情况

第一种情况

应用程序已启动并正在运行，应用程序上下文已创建，然后服务器中出现一些运行时异常，您希望正常关机。在这个场景中，您可以使用如下实用程序

情景2：

当Spring Boot无法创建应用程序上下文本身时，就会出现这种情况。您的场景属于这一类。当应用程序启动时，它尝试从application.properties连接配置，如果有任何问题，将不会创建应用程序上下文本身

因此，在这个场景中，您不能选择正常关闭，因为您没有应用程序上下文的实例。在这种情况下，您可以捕获异常，选择适当的日志记录并手动执行系统退出

       try{
           SpringApplication.run(Application.class, args).close();;
        }
        catch(Exception ex){
            System.out.println("Going to exit");
            System.exit(-1);
        }

---

在此之后，Tomcat实例将不会运行，端口将可用

请共享您的配置文件&pom。xml@Bond-JavaBond doneAlso请分享

应用程序。java

@Bond JavaBond done。在Application.javaHi中没有什么特别之处。在依赖项中添加“spring boot starter tomcat”和插件“spring boot maven plugin”。使用返回“return Application.sources（Application.class）；”覆盖应用程序类中的configure方法，这将修复配置初始化。排除tomcat注释api有什么原因吗？看起来第二个场景中的try/catch解决了这个问题。非常感谢。很难找到这些信息。我还遇到了第二种情况，出现了BeanCreationException，我的应用程序一直在运行。我认为它应该失败并默认停止，也许在某个地方仍然存在问题，但这个解决方案确实帮助我至少停止了应用程序。

       try{
           SpringApplication.run(Application.class, args).close();;
        }
        catch(Exception ex){
            System.out.println("Going to exit");
            System.exit(-1);
        }