spring boot2.0(一 ) 基础环境搭建

1.基础配置

开发环境：window

jdk版本：1.8（spring boot2.0最低要求1.8）

开发工具：eclipse

构建方式：maven3

2.POM配置文件

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.aaron</groupId>
  <artifactId>framework</artifactId>
  <packaging>war</packaging>
  <version>1.0.0</version>
  <name>framework Maven Webapp</name>
  <url>http://maven.apache.org</url>

      <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath />
    </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>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.12</version>
          <scope>test</scope>
        </dependency>

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

        <!-- 单元测试 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- 热部署 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
            <scope>true</scope>
        </dependency>

    </dependencies>

  <build>
    <finalName>framework</finalName>

    <plugins>
        <!-- Spring Boot包含一个Maven插件 ，可以将项目打包为可执行的jar。 -->
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <!-- 没有该配置，devtools 不生效 -->
                <fork>true</fork>
                <addResources>true</addResources>
            </configuration>
        </plugin>
    </plugins>
  </build>
</project>

3.配置启动类：

package com.aaron.framework;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

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

4.添加controller：

package com.aaron.framework.controller;

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

@RestController	//@RestController是返回json数据的controller，@Controller是返回页面的controller
@RequestMapping("/")
public class HelloWorldController {

	@RequestMapping("/")
	public String HelloWorld() {
		return "helloWorld";
	}
}

5.运行测试：

6.页面测试结果：