SpringBoot-自定义stater 启动器

本是古典何须时尚 2022-03-27 05:24 760阅读 0赞

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>          有时候，我们在使用SpringBoot的时候很多都是使用SpringBoot已经写好的场景启动器，但是这些启动只能满足一些常用的大部分功能，但是我们想要完成自己的一些小功能，并不能完成，所以我们需要自己定义场景启动器来完成我们需要完成的功能。
> 
>         以下介绍一下，SpringBoot自定义场景启动器的用法。

## 一、搭建环境 ##

*  创建一个Mavn的空工程

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x2aGFvZ3Vhbmcw_size_16_color_FFFFFF_t_70][]

*  **创建一个Maven用来定义场景启动器 **

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x2aGFvZ3Vhbmcw_size_16_color_FFFFFF_t_70 1][]

*  **定义一个SpringBootInitalizer 来实现自动配置**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x2aGFvZ3Vhbmcw_size_16_color_FFFFFF_t_70 2][]

*  ** 完成之后，删除Maven工程的src 和test 目录，删除springboot工程的test目录，和所有配置文件中的插件依赖，结构如下：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x2aGFvZ3Vhbmcw_size_16_color_FFFFFF_t_70 3][]

*  创建一个HelloProperties如下：

package com.nyist.starter;
    
    import org.springframework.boot.context.properties.ConfigurationProperties;
    
    @ConfigurationProperties(prefix = "nyist.hello")        //用于绑定 yml 和 实体类的属性
    public class HelloProperties {
    
        private String prefix;
        private String suffix;
    
        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;
        }
    }

*  HelloService.java

package com.nyist.starter;
    
    public class HelloService {
    
        HelloProperties helloProperties;
    
        public HelloProperties getHelloProperties() {
            return helloProperties;
        }
    
        public void setHelloProperties(HelloProperties helloProperties) {
            this.helloProperties = helloProperties;
        }
    
        public String sayHelloNyist(String name){
            return  helloProperties.getPrefix()+"-"+name+helloProperties.getSuffix();
        }
    }

*  HelloServiceAutoConfiguration.java

package com.nyist.starter;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
    import org.springframework.boot.context.properties.EnableConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    @Configuration
    @ConditionalOnWebApplication        //web 应用才生效
    @EnableConfigurationProperties(HelloProperties.class)       //让属性文件生效
    public class HelloServiceAutoConfiguration {
    
        @Autowired
        HelloProperties helloProperties;
    
        @Bean       //加入到容器中去
        public HelloService helloService(){
            HelloService helloService = new HelloService();
            helloService.setHelloProperties(helloProperties);
            return helloService;
        }
    }

*  spring.factories  用来配置应用启动时候会自动启动的配置

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
    com.nyist.starter.HelloServiceAutoConfiguration

*  pom.xml 依赖如下：

<?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>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.1.1.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.nyist.starter</groupId>
        <artifactId>nyist-spring-boot-starter-autoconfigure</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>nyist-spring-boot-starter-autoconfigure</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>
        </dependencies>
    </project>

*  nyist-spring-boot-stater 工程下的pom.xml文件如下：

**完成以上操作之后，将这些模块安装到maven仓库中去**

## **二、创建新工程** ##

1.创建一个新的SpringBoot工程，测试定义得 自定义得启动器是否能用

**工程结构如下：**

**![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x2aGFvZ3Vhbmcw_size_16_color_FFFFFF_t_70 4][]**

*  Controller如下：

package com.nyist.springboot08startertest.controller;
    
    import com.nyist.starter.HelloService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class HelloContoller {
    
        @Autowired
        HelloService helloService;
    
        @GetMapping("/hello")
        public String hello(){
            return helloService.sayHelloNyist("哈哈哈-");
        }
    }

*  运行结果：

![20190112105840805.png][]

## 源码下载：[下载][Link 1] ##

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x2aGFvZ3Vhbmcw_size_16_color_FFFFFF_t_70 2]: /images/20220327/9768c6948f2d420a9b55984434c88148.png
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[20190112105840805.png]: /images/20220327/ecaedb1bb5f541b585faf8bc02888c0b.png
[Link 1]: https://download.csdn.net/download/lvhaoguang0/10912338