SrpingBoot入门到入坟01-HelloWorld和SpringBoot打Jar包

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第一个SpringBoot:

建立一个maven项目：

再pom.xml里面增加依赖：

<?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.lql</groupId>

    <artifactId>springboot01</artifactId>

    <version>1.0-SNAPSHOT</version>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.1.10.RELEASE</version>

    </parent>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

    </dependencies>

</project>

建立一个启动类：HelloWorldApplication.java

package com.lql;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

/**

 * @author: lql

 * @date: 2019.11.15

 * Description: 启动类

 */

@SpringBootApplication

public class HelloWorldApplication {

    public static void main(String[] args) {

        SpringApplication.run(HelloWorldApplication.class,args);

    }

}

建立一个Controller:

package com.lql.controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

/**

 * @author: lql

 * @date: 2019.11.15

 * Description: 发送hello请求响应字符串

 */

@RestController

public class HelloController {

    @RequestMapping("hello")

    public String hello() {

        return "lql";

    }

}

启动启动类“run 即可”：

在浏览器中输入地址可得：

至此，第一个HelloWorld写完了。可以看出SpringBoot比传统的Spring+Spring MVC组合更快更省事。

Springboot打Jar包

首先在pom.xml中添加插件：

<?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.lql</groupId>

    <artifactId>springboot01</artifactId>

    <version>1.0-SNAPSHOT</version>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.1.10.RELEASE</version>

    </parent>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

    </dependencies>

    <!--这个插件是将应用打包成一个可执行的jar-->

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>