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spring-boot-starter-xxxxx 是 Spring boot 子模块,开发中我们可以根据自己的需求开引用所需的功能,这样不必引用所有的 Spring boot 依赖包。
我们也可以开发自己的 starter 模块和自定义注解,将我们的项目化整为零,模块化,随时根据项目的需要引用,并且可以使用自定义注解启用它们。
<?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>cn.netkiller</groupId> <artifactId>spring-boot-starter-customize</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>Spring Boot Starter Project</name> <parent> <groupId>cn.netkiller</groupId> <artifactId>parent</artifactId> <version>0.0.1-SNAPSHOT</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <start-class>cn.netkiller.starter.App</start-class> <java.version>11</java.version> <lombok.version>1.16.18</lombok.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
application.properties 加入短信网关的配置项
sms.gateway.url=https://sms.netkiller.cn/v1 sms.gateway.username=netkiller sms.gateway.password=passw0rd
SmsProperties 用于读取前缀为 sms.gateway 的配置项。
package cn.netkiller.autoconfigure; import org.springframework.boot.context.properties.ConfigurationProperties; import lombok.Data; @ConfigurationProperties(prefix = "sms.gateway") @Data public class SmsProperties { private String url; private String username; private String password; public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "SmsProperties [url=" + url + ", username=" + username + ", password=" + password + "]"; } }
package cn.netkiller.autoconfigure; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import cn.netkiller.sms.SmsSender; @EnableConfigurationProperties(value = SmsProperties.class) @Configuration public class SmsAutoConfiguration { @Autowired private SmsProperties smsProperties; @Bean public SmsSender send() { return new SmsSender(this.smsProperties); } }
package cn.netkiller.autoconfigure; import java.lang.annotation.Documented; import java.lang.annotation.Retention; import java.lang.annotation.Target; import java.lang.annotation.ElementType; import java.lang.annotation.RetentionPolicy; import org.springframework.context.annotation.Import; @Target({ ElementType.TYPE }) @Retention(RetentionPolicy.RUNTIME) @Documented @Import({ SmsAutoConfiguration.class }) public @interface EnableSms { }