Spring Boot 自定义 starter

在项目开发的过程中，难免需要自己引入一些其他项目的starter, 或是自己定义的starter, 本文是创建自定义的starter的一些步骤.

本文以JDBC配置为例；

一. 首先创建一个maven过程：

　　

 

 

 

二. 引入依赖

　　maven依赖

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<?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.feng</groupId>   <artifactId>jdbc-spring-boot-starter</artifactId>   <version>1.0-SNAPSHOT</version>     <name>jdbc-spring-boot-starter</name>       <dependencies>     <dependency>       <groupId>org.springframework.boot</groupId>       <artifactId>spring-boot-autoconfigure</artifactId>       <version>2.1.6.RELEASE</version>       <scope>compile</scope>     </dependency>     <!--spring 配置时 处理的依赖-->     <dependency>       <groupId>org.springframework.boot</groupId>       <artifactId>spring-boot-configuration-processor</artifactId>       <version>2.1.6.RELEASE</version>       <optional>true</optional>     </dependency>     <dependency>       <groupId>org.springframework.boot</groupId>       <artifactId>spring-boot-starter-logging</artifactId>       <version>2.1.6.RELEASE</version>     </dependency>     <!--alibaba 数据源-->     <dependency>       <groupId>com.alibaba</groupId>       <artifactId>druid</artifactId>       <version>1.1.10</version>     </dependency>     <!--lombok-->     <dependency>       <groupId>org.projectlombok</groupId>       <artifactId>lombok</artifactId>       <version>1.18.20</version>       <scope>provided</scope>     </dependency>     </dependencies>   <build>     <plugins>       <plugin>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-maven-plugin</artifactId>       </plugin>       <plugin>         <groupId>org.apache.maven.plugins</groupId>         <artifactId>maven-compiler-plugin</artifactId>         <configuration>           <source>1.8</source>           <target>1.8</target>           <encoding>UTF-8</encoding>         </configuration>       </plugin>     </plugins>   </build> </project>

 三. 在项目中新建配置类

　　

　　配置文件 application.yml

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server:   port: 8080   jdbc:   driver-class-name: com.mnysql.cj.jdbc.Driver   url: jdbc:mysql://localhost:3306/bank?characterEncoding=utf-8&serverTimezone=UTC   username: root   password: 123

　　

JdbcProperties.java

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package com.feng.config;   import lombok.Data; import org.springframework.boot.context.properties.ConfigurationProperties;   /**  * Jdbc配置类  */ @ConfigurationProperties(prefix = "jdbc") public class JdbcProperties {       private String driverClassName;     private String url;     private String username;     private String password;       public JdbcProperties() {     }       public String getDriverClassName() {         return driverClassName;     }       public void setDriverClassName(String driverClassName) {         this.driverClassName = driverClassName;     }       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;     } }

　　

JdbcConfig.java

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package com.feng.config;   import com.alibaba.druid.pool.DruidDataSource; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Conditional; import org.springframework.context.annotation.Configuration;   import javax.sql.DataSource;   @Configuration @ConditionalOnClass(DataSource.class) //包含DataSource这样的类才生效 @EnableConfigurationProperties(JdbcProperties.class) public class JdbcConfig {       @Bean     public DataSource dataSource(JdbcProperties prop){         DruidDataSource dataSource = new DruidDataSource();         dataSource.setDriverClassName(prop.getDriverClassName());         dataSource.setUrl(prop.getUrl());         dataSource.setUsername(prop.getUsername());         dataSource.setPassword(prop.getPassword());         return dataSource;     } }

　　还需要在resources 文件目录下新建META-INF目录，新建文件 spring.factories, 配置如下：

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1 2	org.springframework.boot.autoconfigure.EnableAutoConfiguration=\ com.feng.config.JdbcConfig

　　

四. 打包操作

　　执行命令： mvn clean install 

 　  打包成功后，在本地maven仓库里面，找到对应的jar

　　

 

 

 五. 上面的jar，可以根据本地仓库中的路径，直接在pom.xml中引用

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<dependency>     <groupId>com.feng</groupId>     <artifactId>jdbc-spring-boot-starter</artifactId>     <version>1.0-SNAPSHOT</version> </dependency>