springboot情操陶冶-初識springboot

前言：springboot由於其輕便和去配置化等的特性已經被廣泛應用，基於時代潮流以及不被鄙視，筆者於是開辟此篇開始認識springboot

前話

springboot是基於spring而開發的輕量級框架，所以在學習springboot之前，務必對spring的工作模式和源碼有一定的了解。筆者此處就不展開了，如果有興趣可直接戳以下鏈接閱讀即可
Spring源碼情操陶冶-ContextLoaderListener

springboot框架概覽

具體更多的信息，可參考spring官網#springboot。筆者此處對上述的配圖作下簡單的翻譯

springboot是什么

1. springboot讓用戶可以更為簡單的去創建獨立的、基於spring的應用程序並且運行簡單化。

2. springboot固執的認為通過spring平台和其他的第三方包就可以輕松的運行相應的程序。並且說明大部分的springboot應用只需要少部分的spring配置，也就是去配置化

springboot特點

• 創建獨立的Spring應用程序

• 直接內置Tomcat/Jetty/UnderTow等web容器(去war方式部署運行)

• 提供starter依賴以簡化用戶的構建配置

• 當需要的時候自動配置Spring和第三方依賴包

• 提供准生產特征，比如metrics(度量)、heath checks(健康檢查)、externalized configuration(外部化配置)

• 無代碼生成和無XML配置要求

springboot用法

筆者此處不分析springboot的相關用法，相關內容在官方的文檔上已經提的非常清楚，有興趣的直接戳鏈接前往閱讀。Spring Boot Reference

普通方式運行

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>

---

啟動類

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方式運行

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>

---

啟動類

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);
    }
}

小結

筆者以此篇作為springboot的開篇，后續便對springboot的源碼作下簡單的分析，方便讀者和筆者知其所以然而了如其然