springBoot中starter-编程知识

springBoot项目中引入starter

项目引入xxljob，仅需要导入对应的starter包，即可进行快速开发

<dependency><groupId>com.ydl</groupId><artifactId>xxl-job-spring-boot-starter</artifactId><version>0.0.1-SNAPSHOT</version>
</dependency>

xxl-job-spring-boot-starter

目录结构：

pom.xml中仅导入对应的xxl-job-spring-boot-autoconfiguration依赖

<?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"><parent><artifactId>xxl-job-starter</artifactId><groupId>com.xiaozhen</groupId><version>0.0.1-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>xxl-job-spring-boot-starter</artifactId><dependencies><dependency><groupId>com.ydl</groupId><artifactId>xxl-job-spring-boot-autoconfiguration</artifactId><version>0.0.1-SNAPSHOT</version></dependency></dependencies></project>

pom.properties

version=0.0.1-SNAPSHOT
groupId=com.xiaozhen
artifactId=xxl-job-spring-boot-starter

xxl-job-spring-boot-autoconfiguration

目录文件

xxlJobAutoConfiguration为配置类，springBoot启动时会加重

/*** 注解解释：** @Configuration  //指定这个类是一个配置类* @ConditionalOnXXX  //在指定条件成立的情况下自动配置类生效* @AutoConfigureAfter  //指定自动配置类的顺序* @Bean  //给容器中添加组件* @ConfigurationPropertie结合相关xxxProperties类来绑定相关的配置* @EnableConfigurationProperties //让xxxProperties生效加入到容器中*/
@Component
@EnableConfigurationProperties({XxlJobProperties.class})
public class XxlJobAutoConfiguration {private static Logger logger = LoggerFactory.getLogger(XxlJobAutoConfiguration.class);@Resourceprivate XxlJobProperties xxlJobProperties;public XxlJobAutoConfiguration() {}/*** 配置信息**/@Beanpublic XxlJobSpringExecutor xxlJobExecutor() {logger.info(">>>>>>>>>>> xxl-job config init.");XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();xxlJobSpringExecutor.setAdminAddresses(this.xxlJobProperties.getAdminAddresses());xxlJobSpringExecutor.setAppName(this.xxlJobProperties.getExecutorAppName());xxlJobSpringExecutor.setIp(this.xxlJobProperties.getExecutorIp());xxlJobSpringExecutor.setPort(this.xxlJobProperties.getExecutorPort());xxlJobSpringExecutor.setAccessToken(this.xxlJobProperties.getAccessToken());xxlJobSpringExecutor.setLogPath(this.xxlJobProperties.getExecutorLogPath() + this.xxlJobProperties.getExecutorAppName());xxlJobSpringExecutor.setLogRetentionDays(this.xxlJobProperties.getExecutorLogRetentionDays());return xxlJobSpringExecutor;}
}

xxlJobProperties

@ConfigurationProperties(prefix = "xxl.job"
)
public class XxlJobProperties {private String adminAddresses = "http://localhost:8093/xxl-job-admin";private String accessToken;private String executorAppName = "xxl-job-executor-default";private String executorIp;private int executorPort = 9999;private String executorLogPath = "/data/applogs/xxl-job/jobhandler/";private int executorLogRetentionDays = 30;public XxlJobProperties() {}
}

pom.xml导入相关的jar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><artifactId>xxl-job-starter</artifactId><groupId>com.xiaozhen</groupId><version>0.0.1-SNAPSHOT</version></parent><groupId>com.ydl</groupId><artifactId>xxl-job-spring-boot-autoconfiguration</artifactId><version>0.0.1-SNAPSHOT</version><name>xxl-job-spring-boot-autoconfiguration</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</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-configuration-processor</artifactId><optional>true</optional></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></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><!-- xxl-job-core --><dependency><groupId>com.xuxueli</groupId><artifactId>xxl-job-core</artifactId><version>2.1.1</version></dependency></dependencies>
</project>

spring.factories文件（spring启动的时候会加载此文件中的配置类）

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.ydl.xxljobspringbootautoconfiguration.XxlJobAutoConfiguration

另外这个spring.factories文件还可配置监听类

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.alibaba.boot.dubbo.autoconfigure.DubboAutoConfigurationorg.springframework.context.ApplicationListener=\
com.alibaba.boot.dubbo.context.event.OverrideDubboConfigApplicationListener,\
com.alibaba.boot.dubbo.context.event.WelcomeLogoApplicationListener,\
com.alibaba.boot.dubbo.context.event.AwaitingNonWebApplicationListener

public class AwaitingNonWebApplicationListener implements ApplicationListener<ApplicationReadyEvent> {@Order //最低优先级确保最后执行
public class OverrideDubboConfigApplicationListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent> {@Order(LoggingApplicationListener.DEFAULT_ORDER + 1)
public class WelcomeLogoApplicationListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent> {