springboot情操陶冶-初识springboot

前言：springboot由于其轻便和去配置化等的特性已经被广泛应用，基于时代潮流以及不被鄙视，笔者于是开辟此篇开始认识springboot

前话

springboot是基于spring而开发的轻量级框架，所以在学习springboot之前，务必对spring的工作模式和源码有一定的了解。笔者此处就不展开了，如果有兴趣可直接戳以下链接阅读即可
Spring源码情操陶冶-ContextLoaderListener

springboot框架概览

具体更多的信息，可参考spring官网#springboot。笔者此处对上述的配图作下简单的翻译

springboot是什么

1. springboot让用户可以更为简单的去创建独立的、基于spring的应用程序并且运行简单化。

2. springboot固执的认为通过spring平台和其他的第三方包就可以轻松的运行相应的程序。并且说明大部分的springboot应用只需要少部分的spring配置，也就是去配置化

springboot特点

• 创建独立的Spring应用程序

• 直接内置Tomcat/Jetty/UnderTow等web容器(去war方式部署运行)

• 提供starter依赖以简化用户的构建配置

• 当需要的时候自动配置Spring和第三方依赖包

• 提供准生产特征，比如metrics(度量)、heath checks(健康检查)、externalized configuration(外部化配置)

• 无代码生成和无XML配置要求

springboot用法

笔者此处不分析springboot的相关用法，相关内容在官方的文档上已经提的非常清楚，有兴趣的直接戳链接前往阅读。Spring Boot Reference

普通方式运行

jdk(1.8)/springboot(2.0.3.RELEASE)/spring(5.0.7.RELEASE)

---

maven配置

<?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.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo-springboot</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <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-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>

---

启动类

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoSpringbootApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoSpringbootApplication.class, args);
    }
}

web方式运行

jdk(1.8)/springboot(2.0.3.RELEASE)/spring(5.0.7.RELEASE)

---

maven配置

<?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.example</groupId>
    <artifactId>demo-springboot-web</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo-springboot-web</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </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>

---

启动类

package com.example.demospringbootweb;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoSpringbootWebApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoSpringbootWebApplication.class, args);
    }
}

小结

笔者以此篇作为springboot的开篇，后续便对springboot的源码作下简单的分析，方便读者和笔者知其所以然而了如其然