使用SpringBoot自定义starter详解

目录一、新建一个工程二、xxx-sprig-boot-starter-configure模块自动配置编码2.1 服务层编码2.2 属性配置类编码2.3 starter自动配置类编码2.4 添加自动配置类到META-INF路径下2.5 将工程安装到本地三、新建一个工程测试自定义starter3.1 编写controller层3.2 编写配置文件四、测试结果4.1 使用starter默认配置4.2 使用自定义配置

一、新建一个工程

工程由xxx-sprig-boot-starter和xxx-sprig-boot-starter-configure两个模块组成；

xxx-sprig-boot-starter模块

只用来做依赖导入 依赖于 xxx-sprig-boot-starter-configure模块，没有实际代码

<?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>com.ander</groupId>    <artifactId>ander-spring-boot-starter</artifactId>    <version>1.0-SNAPSHOT</version>    <!--依赖ander-spring-boot-starter-configure工程-->    <dependencies>        <dependency>            <groupId>com.ander</groupId>            <artifactId>ander-spring-boot-starter-configure</artifactId>            <version>0.0.1-SNAPSHOT</version>        </dependency>    </dependencies></project>

xxx-sprig-boot-starter-configure模块

专门自动配置模块 依赖于spring-boot-starter-web

<?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>2.3.10.RELEASE</version>        <relativePath/> <!-- lookup parent from repository -->    </parent>    <groupId>com.ander</groupId>    <artifactId>ander-spring-boot-starter-configure</artifactId>    <version>0.0.1-SNAPSHOT</version>    <name>ander-spring-boot-starter-configure</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-web</artifactId>        </dependency>    </dependencies></project>

二、xxx-sprig-boot-starter-configure模块自动配置编码

2.1 服务层编码

/** * Service层 * * @Author: Ander * @Date: 2021-05-04 */public class HelloService {    private HelloServiceProperties helloServiceProperties;    public String helloService(String name) {        return helloServiceProperties.getPrefix() + " "+ name + " " + helloServiceProperties.getSuffix();    }    public HelloServiceProperties getHelloServiceProperties() {        return helloServiceProperties;    }    public void setHelloServiceProperties(HelloServiceProperties helloServiceProperties) {        this.helloServiceProperties = helloServiceProperties;    }}

2.2 属性配置类编码

/** * 属性配置类 * * @Author: Ander * @Date: 2021-05-04 */@ConfigurationProperties(prefix = "com.ander")public class HelloServiceProperties {    private String prefix = "hi";    private String suffix = "hello world";    public String getPrefix() {        return prefix;    }    public void setPrefix(String prefix) {        this.prefix = prefix;    }    public String getSuffix() {        return suffix;    }    public void setSuffix(String suffix) {        this.suffix = suffix;    }}

2.3 starter自动配置类编码

@EnableConfigurationProperties({HelloServiceProperties.class})作用：让xxxProperties生效加入到容器中

/** * 自定义starter自动配置类 * * @Author: Ander * @Date: 2021-05-04 */@Configuration@ConditionalOnWebApplication // 指定web应用才生效@EnableConfigurationProperties({HelloServiceProperties.class})public class HelloServiceAutoConfigure {    @Autowired    private HelloServiceProperties helloServiceProperties;    @Bean    public HelloService helloService() {        HelloService helloService = new HelloService();        helloService.setHelloServiceProperties(helloServiceProperties);        return helloService;    }}

2.4 添加自动配置类到META-INF路径下

2.5 将工程安装到本地

注意先安装xxx-spring-boot-starter-configure，再安装xxx-spring-boot-starter

三、新建一个工程测试自定义starter

3.1 编写controller层

/** * starter测试控制类 * * @Author: Ander * @Date: 2021-05-05 */@RestControllerpublic class StarterTestController {    @Autowired    private HelloService helloService;    @GetMapping("hello")    public String hello(String name) {        return helloService.helloService(name);    }}

3.2 编写配置文件

server.port=8888com.ander.prefix=HIcom.ander.suffix=HELLO WORLD

四、测试结果

4.1 使用starter默认配置

4.2 使用自定义配置

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