如何使用springboot自定義stater啟動流程

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springboot啟動時自動加載application.properties或者application.yml，如何定義自己的配置讓springboot自動識別：

首先我們新建一個maven工程打包方式選擇jar，然后引入所需的包

<?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>2.1.6.RELEASE</version>    <relativePath /> <!-- lookup parent from repository -->  </parent>  <groupId>com.ruobbo.xxl</groupId>  <artifactId>ruobbo.xxl</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>jar</packaging>  <properties>    <java.version>1.8</java.version>  </properties>  <dependencies>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter</artifactId>      <version>2.1.6.RELEASE</version>    </dependency>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-autoconfigure</artifactId>      <version>2.1.6.RELEASE</version>    </dependency>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-configuration-processor</artifactId>      <version>2.1.6.RELEASE</version>    </dependency>    <dependency>      <groupId>org.projectlombok</groupId>      <artifactId>lombok</artifactId>      <version>1.18.8</version>      <scope>provided</scope>    </dependency>    <dependency>      <groupId>com.xuxueli</groupId>      <artifactId>xxl-job-core</artifactId>      <version>2.0.1</version>    </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>  <!-- 項目部署配置 (上傳到私服的配置) -->  <distributionManagement>    <repository>      <id>releases</id>      <url>http://192.168.1.99:8081/nexus/content/repositories/releases</url>    </repository>    <snapshotRepository>      <id>snapshots</id>      <url>http://192.168.1.99:8081/nexus/content/repositories/snapshots</url>    </snapshotRepository>  </distributionManagement></project>

然后是配置讀取

@ConfigurationProperties(prefix = "xxl.job.executor")@Datapublic class XxlProperties {  private String adminAddresses;  private String appName;  private String ip;  private int port;  private String accessToken;  private String logPath;  private int logRetentionDays;  private String basePackages;  }

將讀取到的配置注入到bean中，然后加載到spring bean容器中

@Configuration@EnableConfigurationProperties(XxlProperties.class)public class XxlAutoConfiguration {    private Logger logger = LoggerFactory.getLogger(XxlAutoConfiguration.class);    @Resource  private XxlProperties xxlProperties;    @Bean(initMethod = "start", destroyMethod = "destroy")  public XxlJobSpringExecutor xxlJobExecutor() {    logger.info(">>>>>>>>>>> xxl-job config init.");    XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();    xxlJobSpringExecutor.setAdminAddresses(xxlProperties.getAdminAddresses());    xxlJobSpringExecutor.setAppName(xxlProperties.getAppName());    xxlJobSpringExecutor.setIp(xxlProperties.getIp());    xxlJobSpringExecutor.setPort(xxlProperties.getPort());    xxlJobSpringExecutor.setAccessToken(xxlProperties.getAccessToken());    xxlJobSpringExecutor.setLogPath(xxlProperties.getLogPath());    xxlJobSpringExecutor.setLogRetentionDays(xxlProperties.getLogRetentionDays());    return xxlJobSpringExecutor;  }  }

最后在resources目錄下添加META-INF文件夾添加spring.factories文件，文件內容為指定要初始化springbean的類全路徑

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\com.ruobbo.xxl.XxlAutoConfiguration

使用過程中引入包

<dependency>      <groupId>com.ruobbo.xxl</groupId>      <artifactId>ruobbo.xxl</artifactId>      <version>0.0.1-SNAPSHOT</version>    </dependency>

然后添加配置到application.properties或者application.yml

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