Springboot环境搭建_第一个例子

首先创建一个maven项目

maven项目创建完成之后，找到pom.xml配置节点。需要springboot-starter-web ，springboot-starter-test，springboot-starter-parent，springboot-starter-plugin。

pom.xml配置文件：

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.happy</groupId>
    <artifactId>11SpringBoot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>11SpringBoot</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.7</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>

这样环境搭建完成。

做第一个例子，首先创建一个controller：

controller代码：

package cn.happy;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {




    @RequestMapping("/hello")
    public String ob(){
        System.out.println("我们进入了App");
        return "success";
    }
}

之后在App类中加上一个注解：SpringbootApplication

在App类的mian方法中调用： SpringApplication.run(App.class,args);

package cn.happy;

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

/**
 * Hello world!
 *
 */
@SpringBootApplication
public class App 
{
    public static void main( String[] args )
    {
        SpringApplication.run(App.class,args);
    }
}